WO2012000144A1 - 特高压直流输电接线方法、换流站及特高压直流输电系统 - Google Patents

特高压直流输电接线方法、换流站及特高压直流输电系统 Download PDF

Info

Publication number
WO2012000144A1
WO2012000144A1 PCT/CN2010/001349 CN2010001349W WO2012000144A1 WO 2012000144 A1 WO2012000144 A1 WO 2012000144A1 CN 2010001349 W CN2010001349 W CN 2010001349W WO 2012000144 A1 WO2012000144 A1 WO 2012000144A1
Authority
WO
WIPO (PCT)
Prior art keywords
uhv
converter station
low
power
inverter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2010/001349
Other languages
English (en)
French (fr)
Inventor
刘振亚
舒印彪
孙昕
高理迎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
Original Assignee
State Grid Corp of China SGCC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by State Grid Corp of China SGCC filed Critical State Grid Corp of China SGCC
Priority to US13/583,892 priority Critical patent/US9543762B2/en
Priority to EP10853850.5A priority patent/EP2605358B1/en
Priority to BR112012023301-7A priority patent/BR112012023301B1/pt
Publication of WO2012000144A1 publication Critical patent/WO2012000144A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for AC mains or AC distribution networks
    • H02J3/36—Arrangements for transfer of electric power between AC networks via high-voltage DC [HVDC] links; Arrangements for transfer of electric power between generators and networks via HVDC links
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]

Definitions

  • the invention relates to the field of ultra-high voltage technology, in particular to a wiring method for rectifying side UHV DC transmission, a wiring method for UHV direct current transmission on the inverter side, a wiring method for UHV direct current transmission, and a rectification side High-voltage converter station, inverter-side UHV converter station and UHV DC transmission system.
  • FIG. 1 is a schematic diagram of the layout of the existing conventional UHV converter station, that is, two high-end valve halls are arranged in one converter station. 101 and 2 low-end valve halls 102, each of which has a plurality of high-end transformers disposed therein, and each of the low-end valve halls 102 is provided with a plurality of low-end transformers.
  • the high and low end valve halls are in the same physical location, ie each UHV converter station includes a high-end transformer and a low-end transformer.
  • the UHV converter station itself is a very complicated project. Because the high-end transformer in the UHV converter station itself has a large volume and volume, it is not convenient to transport, so it must be located in a convenient place for construction. For the converter station, multiple large-capacity power sources need to be merged and output through the UHV DC transmission line. However, large-capacity power supplies are often located in remote locations. In this way, multiple large-capacity power supplies in different remote areas must be transported to the location of the UHV converter station by means of AC transmission. Therefore, many AC circuits are needed. . Referring to FIG. 2, it is a schematic diagram of a wiring manner for UHV DC transmission in the prior art.
  • the power supply terminal 201 transmits the converged multi-channel high-voltage alternating currents (each of which may be 500 kV) to the UHV converter station 202 through the power supply converging means 205.
  • the power feeding device 205 is provided with a bus for AC convergence and a device associated with the line, and the power combining device 205 is configured to collect the first power collection point and the second power source in the power terminal 201. The power of the point is converged.
  • the rectification-side UHV converter station 202 converts the received multi-channel high-voltage AC power into UHV DC power and transmits it to the inverter-side UHV converter station 203, which receives the UHV high-voltage converter station 203.
  • the DC power is converted to the AC power required for the load and then transmitted to the load region 204.
  • the UHV converter station used in the prior art Xiangjiaba-Shanghai ⁇ 800 kV special high-voltage direct current transmission project uses the layout shown in Figure 1 and the wiring shown in Figure 2. the way.
  • the high-end transformers on the rectification side and the inverter side are large in volume and volume, they are not easy to transport. According to the construction requirements of the UHV converter station, the high-end transformers must be transported to a designated location for convenient construction. Transportation technology is extremely difficult and costly.
  • the present invention provides a wiring method for the rectification side UHV DC transmission and a rectification side UHV converter station.
  • a wiring method for rectifying side UHV DC transmission which includes separately setting a rectification side UHV high-end converter station and a rectification side UHV low-end converter station;
  • the terminal converter station receives the first alternating current from the first power collection point, converts the first alternating current into the first low voltage direct current, and inputs it to the rectification side UHV high-end converter station;
  • the rectification side UHV high-end converter station receives the first The second alternating current and the first low-voltage direct current of the second power collecting point rectify the second alternating current and superimpose the first low-voltage direct current to generate the first ultra-high voltage direct current, and output the first ultra-high voltage direct current through the ultra-high voltage direct current transmission line.
  • the rectification side UHV high-end converter station may include two high-end valve halls of different polarities; the rectification side UHV low-end converter station may include Two low-end valve halls with different polarities.
  • two high-end valve halls of different polarities are located at different positions and/or two low-end valve halls of different polarities are located at different positions.
  • a rectification-side UHV converter station including a rectification-side UHV low-end converter station for receiving a first AC power from a first power collection point, and the first AC power Converted to the first low-voltage DC power, and input to the rectification side UHV high-end converter station; the rectification side UHV high-end converter station, for receiving the second AC power from the second power collection point and the first low-voltage DC, the second The alternating current rectification is superimposed with the first low voltage direct current to generate a first ultra high voltage direct current, and the first ultra high voltage direct current is output through the ultra high voltage direct current transmission line.
  • the rectification side UHV low-end converter station includes a first power supply access module for receiving the first AC power from the first power collection point, and the first AC power
  • the first power conversion module is configured to convert the first alternating current into the first low voltage direct current and output to the rectification side ultra high voltage high end converter station.
  • the rectification side UHV The high-end converter station includes a second power input module, configured to receive the second alternating current from the second power collection point and transmit the second alternating current to the second power conversion module, and the second power conversion module is configured to rectify the second alternating current with the first
  • the low-voltage direct current is superimposed to generate a first UHV DC power, and the first UHV DC power is output through the UHV DC transmission line.
  • the rectification side UHV high-end converter station comprises two high-end valve halls of different polarities; the rectification side UHV low-end converter station comprises two different polarities Low-end valve hall.
  • two high-end valve halls of different polarities are located at different positions and/or two low-end valve halls of different polarities are located at different positions.
  • a wiring method for rectifying side UHV DC transmission includes separately setting a rectification side UHV high-end converter station, a rectification side UHV low-end converter station, and a rectification side.
  • the rectification-side ultra-high-voltage low-end converter station receives the first alternating current from the first power collection point, converts the first alternating current into the first low-voltage direct current, and inputs to the rectification side ultra-high voltage mid-end commutation
  • the rectification side UHV mid-end converter station receives the alternating current and the first low-voltage direct current, and the alternating current is rectified and superimposed with the first low-voltage direct current to generate the first medium-voltage direct current, and the first medium-voltage direct current is input to the rectification side ultra-high voltage.
  • the rectification side UHV high-end converter station receives the second alternating current and the first medium-voltage direct current from the second power collection point, and rectifies the second alternating current and superimposes with the first medium-voltage direct current to generate the first ultra-high voltage Direct current, and output the first UHV DC through the UHV DC transmission line.
  • the number of rectification side UHV mid-end converter stations is one or more.
  • the method for rectifying side UHV DC transmission wiring when there are more than two UHV mid-end converter stations on the rectification side, two or more rectification side UHV mid-end converter stations are cascaded in sequence
  • the method further includes receiving, by each rectifying side, the high-voltage mid-end converter station, the corresponding alternating current and the input direct current, and the corresponding alternating current is rectified and superimposed with the input direct current, and outputting the added direct current.
  • the rectification side UHV high-end converter station includes two high-end halls with different polarities; the rectification side UHV mid-end converter station includes two middle-end valve halls with different polarities; the rectification side UHV low-end commutation The station consists of two low-end valve halls with different polarities.
  • two high-end valve halls of different polarities are located at different positions and/or two different center valve chambers are located at different positions and / or two low-end valve halls of different polarity are located in different positions.
  • a rectification-side UHV converter station including a rectification-side UHV low-end converter station for receiving a first AC power from a first power collection point, and the first AC power Converted to the first low-voltage DC power, and input to the rectification side UHV mid-end converter station; the rectification side UHV mid-end converter station is used to receive AC power and the first low-voltage DC power, and the AC power is rectified and superimposed with the first low-voltage DC power a first medium voltage direct current is generated, and the first medium voltage direct current is input to the rectification side UHV high-end converter station; the rectification side ultra-high voltage high-end converter station is configured to receive the second alternating current from the second power collection point and the first A medium voltage direct current, the second alternating current is rectified and superposed with the first medium voltage direct current to generate a first ultra high voltage direct current, and the first ultra high voltage direct current is output through the ultra high voltage direct
  • the rectification side UHV low-end converter station includes a first power input module for receiving the first AC power from the first power collection point, which will be the first The alternating current is transmitted to the first power conversion module; the first power conversion module is configured to convert the first alternating current into the first low voltage direct current, and output to the rectification side high voltage middle end connected to the rectification side ultra high voltage low end converter station Stream station.
  • the number of rectification side UHV mid-range converter stations is one or more.
  • the end UHV rectifier converter station is two or more, two or more successively cascaded rectifier Mid UHV converter station 0
  • the rectification side UHV mid-range converter station includes a fifth power input module for receiving from a corresponding power collection point The alternating current is transmitted to the fifth power conversion module; the fifth power conversion module is configured to rectify the alternating current and superimpose the input direct current, and output the superimposed direct current.
  • the rectification-side UHV high-end converter station includes a second power input module for receiving a second AC power from the second power collection point and transmitting the second AC power to the second power source
  • the second power conversion module is configured to rectify the second alternating current and superimpose the input direct current to generate a first ultra high voltage direct current, and output the first ultra high voltage direct current through the ultra high voltage direct current transmission line.
  • the rectification side UHV high-end converter station includes two high-end valve halls of different polarities; the rectification side UHV mid-end converter station includes two different polarities The mid-end valve hall; the rectification side UHV low-end converter station includes two low-end valve halls of different polarities.
  • two high-end valve halls of different polarities are located at different positions and/or two differently-positioned central valve halls are located at different positions and/or two The low-end valve halls with different polarities are located at different locations.
  • the method for rectifying side UHVDC transmission line and the rectification side UHV converter station of the present invention since the rectification side UHV high-end converter station and the rectification side UHV low-end converter station are separately arranged, there is no need to The first power collection point and the second power collection point perform power supply convergence, thereby reducing the number of outgoing lines of the AC line between the first power collection point, the second power collection point, and the rectification side UHV converter station, thereby reducing Transmission cost and transmission loss have achieved good economic benefits.
  • the rectification side UHV high and low end converter stations can be separately set, the problem of high-end transformer transportation is solved, the construction cost is greatly reduced, and the freight rate is reduced.
  • the above embodiment can also facilitate the dispersion of power supply access.
  • the power output of two or more medium-sized power plants or power plants within a distance of 200 - 300 km can be bundled and delivered at a very long distance, so It can save a lot of AC power transmission lines and reduce power loss.
  • the present invention also provides a technical problem for inconvenience of power supply in the load end caused by the distance between the UHV converter station on the inverter side and the load and the single point of the load region.
  • the present invention also provides an UHV DC transmission for the inverter side. Wiring method and inverter side UHV converter station.
  • an infrared high voltage direct current transmission for an inverter side includes separately setting an inverter side UHV high-end converter station and an inverter side UHV low-end converter station; the inverter side UHV high-end converter station inputs the first UHV DC through the UHV DC transmission line, The third alternating current and the second low-voltage direct current are output, and the third alternating current is sent to the first load region; the second low-voltage direct current is converted into the fourth alternating current by the inverter-side ultra-high voltage low-end converter station and transmitted to the second load region.
  • the inverter side UHV high-end converter station may include two high-end valve halls of different polarities; the inverter side UHV low-end commutation The station can include two low-end valve halls of different polarities.
  • two high-end valve halls of different polarities are located at different positions and/or two low-end valve halls of different polarities are located at different positions. position.
  • an inverter side UHV converter station including an inverter side UHV high-end converter station, for inputting the first UHV DC power through the UHV DC transmission line, and outputting the first Three alternating current and second low voltage direct current, and the third alternating current is delivered to the first load region; the inverter side ultra high voltage low end converter station is configured to convert the second low voltage direct current into the fourth alternating current and transmit to the second load region .
  • the inverter-side UHV high-end converter station includes a fourth power input module for receiving the first UHV DC input through the UHV DC transmission line, and And transmitting to the fourth power conversion module; the fourth power conversion module is configured to receive the first UHV DC power, output the third AC power and the second low voltage DC power, and send the third AC power to the first load region, and the second low voltage DC power Transfer to the inverter side UHV low-end converter station.
  • the inverter-side UHV low-end converter station includes a third power input module for receiving the second low-voltage DC power and transmitting the third power conversion module to the third power conversion module. And a third power conversion module, configured to convert the second low voltage direct current into the fourth alternating current and transmit to the second load region.
  • the inverter side UHV high-end converter station includes two high-end valve halls of different polarities; the inverter side UHV low-end converter station includes Two low-end valve halls with different polarities.
  • two high-end valve halls of different polarities are located at different positions and/or two low-end valve halls of different polarities are located at different positions.
  • a wiring method for an inverter side UHV DC transmission includes separately setting an inverter side UHV high-end converter station, an inverter side UHV low-end converter station, and Inverter side UHV mid-range converter station; Inverter side UHV high-end converter station inputs first UHV DC power through UHV DC transmission line, outputs third AC power and second medium voltage DC power; Delivers third AC power to The first load region; the inverter side UHV mid-end converter station receives the second medium voltage direct current, outputs the alternating current and the second low voltage direct current, and sends the output alternating current to the corresponding load region; through the inverter side ultra high voltage low end The converter station converts the second low voltage direct current into a fourth alternating current and transmits it to the second load region.
  • the number of inverter side UHV mid-range converter stations is one or more.
  • each inverter side UHV mid-end converter station receives the input DC power, outputs corresponding AC power and DC power, and sends the corresponding AC power to the corresponding load area.
  • the inverter side UHV high-end converter station comprises two high-end valve halls with different polarities; the inverter side UHV mid-end converter station It includes two middle-end valve halls with different polarities; the inverter-side UHV low-end converter station includes two low-end valve halls with different polarities.
  • two high-end valve halls of different polarities are located at different positions and/or two different polarity of the middle-end valve hall are located at different positions. And / or two low-end valve halls of different polarities are located at different positions.
  • an inverter side UHV converter station including an inverter side UHV high-end converter station for input through an UHV DC transmission line. a first UHV direct current, outputting a third alternating current and a second medium voltage direct current, and transmitting the third alternating current to the first load region, and inputting the second medium voltage direct current to the inverter side extra high voltage intermediate converter station;
  • the side ultra-high voltage middle-end converter station is configured to receive the second medium-voltage direct current, output the alternating current and the second low-voltage direct current, and send the output alternating current to the corresponding load area; the inverter side ultra-high voltage low-end converter station, Receiving a second low voltage direct current and converting to a fourth alternating current transmission to the second load region.
  • the inverter-side UHV high-end converter station includes a fourth power input module for receiving the first UHV DC input through the UHV DC transmission line. And transmitting to the fourth power conversion module; the fourth power conversion module is configured to receive the first UHV DC power, output the third AC power and the second medium voltage DC power, and deliver the third AC power to the first load region, and The second medium voltage direct current is transmitted to the inverter side UHV mid-end converter station connected to the UHV high-end converter station on the inverter side.
  • the number of inverter-side UHV mid-range converter stations is one or more.
  • the inverter side UHV mid-range converter station includes a sixth power input module for receiving the input DC power and transmitting to the Six power conversion modules; six power conversion modules for receiving input DC power, and outputting alternating current and direct current, and sending the output alternating current to the corresponding load area.
  • the inverter-side UHV low-end converter station includes a third power input module for receiving the input DC power and transmitting it to the third power converter.
  • the third power conversion module is configured to convert the input DC power into a fourth alternating current and transmit the signal to the second load region.
  • the high-end converter station includes two high-end valve halls with different polarities; the inverter-side UHV mid-range converter station includes two middle-end valve halls with different polarities; the inverter-side UHV low-end converter station includes two Low-end valve halls with different polarities.
  • two high-end valve halls of different polarity of the inverter side UHV high-end converter station are located at different positions and/or the inverter side UHV mid-range
  • the two differently-polarized mid-valve chambers of the converter station are located at different positions and/or the two low-end valve halls of different polarity of the inverter side UHV low-end converter station are located at different positions.
  • the method for connecting the UHV DC transmission line on the inverter side and the UHV converter station on the inverter side of the present invention because the inverter side UHV high-end converter station is separately set from the inverter side UHV low-end converter station, Power can be directly projected to multiple load centers, which not only reduces the power foldback and power loss caused by the transmission of electrical energy between the load areas, but also provides more convenient power to the load terminals.
  • the inverter side can easily access the AC system of each load zone by setting such a step-by-step evacuation energy of a plurality of load centers.
  • the present invention adopts a multi-drop method to simplify the network structure on the inverter side, and does not cause excessive short-circuit current of the AC network frame due to excessive system capacity.
  • the short-circuit current caused by the standard exceeds the standard, thereby effectively solving the problem of poor safety and stability of the power grid caused by the huge amount of power generated by the single-drop point of the load region on the inverter side in the prior art. It also solves the problem of poor reliability of parallel multi-terminals. For an inverter to be cut, all inverters of this polarity must be cut off.
  • the present invention also provides a wiring method for an ultra-high voltage direct current transmission and an ultra high voltage direct current transmission system.
  • a wiring method for UHV DC transmission includes separately setting a rectification side UHV high-end converter station and a rectification side UHV low-end converter station; respectively, setting an inverter side UHV The high-end converter station and the inverter side ultra-high voltage low-end converter station; the rectification side ultra-high voltage low-end converter station receives the first alternating current from the first power collection point, converts the first alternating current into the first low-voltage direct current, and inputs To the rectification side UHV high-end converter station; the rectification side UHV high-end converter station receives the second alternating current and the first low-voltage direct current from the second power collection point, and rectifies the second alternating current and superimposes with the first low-voltage direct current to generate the first An ultra-high voltage direct current, and outputting the first ultra-high voltage direct current through the ultra-high voltage direct current transmission line; the inverter side ultra-high voltage high-end
  • the rectification side UHV high-end converter station includes two high-end valve halls of different polarities; the rectification side UHV low-end converter station includes two polarities Different low end valve halls.
  • two high-end valve halls of different polarities are located at different positions and/or two low-end valve halls of different polarities are located at different positions.
  • the inverter side UHV high-end converter station includes two high-end valve halls of different polarities; the inverter side UHV low-end converter station includes two A low-end valve hall with different polarities.
  • two high-end valve halls of different polarity of the inverter side UHV high-end converter station are located at different positions and/or the inverter side has a low voltage and a low voltage.
  • the two low-end valve halls of different polarity at the end converter station are located at different positions.
  • a wiring method for UHV DC transmission comprising separately setting a rectification side UHV high-end converter station, a rectification side UHV low-end converter station, and a rectification side UHV.
  • the rectification side ultra-high voltage low-end converter station receives the first alternating current from the first power collection point, converts the first alternating current into the first low-voltage direct current, and inputs to the rectification side ultra-high voltage middle-end converter station;
  • the terminal converter station receives the alternating current and the first low-voltage direct current, and the alternating current is rectified and superimposed with the first four-voltage direct current to generate the first medium-voltage direct current, and the first medium-voltage direct current is input to the rectification side ultra-high voltage high-end converter station;
  • the rectification side UHV high-end converter station receives the second alternating current and the first medium voltage direct current from the second power collection point, rectifies the second alternating current and superimposes with the first medium voltage direct current to generate the first ultra high voltage direct current, and
  • the number of rectification side UHV mid-range converter stations is one or more.
  • the method for connecting a UHV DC transmission line when there are two or more converter stations at the rectifier side of the UHV intermediate end, two or more rectification side UHV mid-end converter stations are cascaded in sequence, The method further includes receiving, by each rectification side, the high-voltage mid-end converter station, the corresponding alternating current and the input direct current, and the corresponding alternating current is rectified and superimposed with the input direct current, and outputting the superposed direct current.
  • the number of inverter side UHV mid-range converter stations is one or more.
  • the method for connecting UHV DC transmission when there are two or more UHV mid-end converter stations on the inverter side, two or more inverter-side UHV mid-range converter stations are cascaded in sequence
  • the method further includes receiving, by each inverter side, the high-voltage mid-range converter station, the input direct current, outputting the corresponding alternating current and direct current, and sending the corresponding alternating current to the corresponding load area.
  • the side UHV high-end converter station includes two high-end valve halls with different polarities; the rectification side UHV mid-end converter station includes two middle-end valve halls with different polarities; the rectification side UHV low-end converter station includes two A low-end valve hall with different polarities.
  • two high-end valve halls of different polarities are located at different positions and/or two different polarity of the middle valve halls are located at different positions and/or Two low-end valve halls of different polarities are located at different positions.
  • the inverter side UHV high-end converter station includes two high-end valve halls of different polarities; the inverter side UHV mid-end converter station includes two The mid-range valve hall with different polarity; the inverter-side UHV low-end converter station includes two low-end valve halls with different polarities.
  • two high-end valve halls of different polarity at the inverter side UHV high-end converter station are located at different positions and
  • a UHV DC transmission system including the rectification side UHV converter station and the inverter side UHV converter station of the above embodiment, wherein the rectification side UHV converter station
  • the rectification side UHV high-end converter station in the rectification side and the UHV high-end converter station on the inverter side in the UHV converter station on the inverter side are connected through the UHV DC transmission line.
  • the rectification side UHV high-end converter station includes two high-end valve halls of different polarities; the rectification side UHV low-end converter station includes two low-end low-end terminals. Valve hall.
  • two high-end valve halls of different polarities are located at different positions and/or two low-end valve halls of different polarities are located at different positions.
  • the inverter side UHV high-end converter station includes two high-end valve halls of different polarities; the inverter side UHV low-end converter station includes two poles. Different low-end valve halls.
  • two high-end halls of different polarity of the inverter side UHV high-end converter station are located at different positions and/or inverter side UHV low-end converter stations The two low-end valve halls of different polarities are located at different positions.
  • the amount of the rectification side UHV mid-range converter station is one or more.
  • the two high-voltage intermediate-side converter stations are cascaded in sequence.
  • the number of inverter side UHV mid-range converter stations is one or more.
  • the inverter side when there are two or more converter stations at the intermediate side of the inverter side, the inverter side is cascaded with two or more inverter side UHV mid-end converter stations.
  • the rectification side UHV high-end converter station includes two high-end valve halls of different polarities; the rectification side UHV mid-end converter station includes two different polarities.
  • the mid-end valve hall; the rectification side UHV low-end converter station includes two low-end valve halls of different polarities.
  • two high-end valve halls of different polarities are located at different positions and/or two different polarity of the middle end valve hall are located at different positions and/or two The low-end valve halls with different polarities are located at different locations.
  • the inverter side UHV high-end converter station includes two high-end valve halls of different polarities; the inverter side UHV mid-end converter station includes two different polarities.
  • the mid-end valve hall; the inverter-side UHV low-end converter station includes two low-end valve halls of different polarities.
  • two high-end valve halls of different polarity of the inverter side UHV high-end converter station are located at different positions and/or inverter side UHV mid-end exchange
  • the two different polarity mid-end valve halls of the flow station are located at different positions and/or the two low-end valve halls of different polarity of the inverter side of the UHV low-end converter station are located at different positions. s position.
  • the utility model relates to an ultra-high voltage direct current transmission wiring method and an ultra-high voltage direct current transmission system, which is characterized in that a rectification side UHV high-end converter station is separately arranged from a rectification side UHV low-end converter station, and an inverter side UHV high-end is exchanged
  • the flow station is separately arranged from the UHV low-end converter station on the inverter side, so that the first power supply collection point and the second power supply collection point do not need to be connected to the power supply at the rectification side, and the UHV commutation of the rectification side is reduced.
  • the number of AC wiring backs of the station reduces the transmission cost and transmission loss, and obtains better economic benefits.
  • the electric energy can be directly projected to multiple load centers on the inverter side, which reduces the transmission of electric energy between the load areas.
  • the power foldback and power loss are also convenient for the load to use the supplied power.
  • 1 is a schematic view showing the arrangement of a conventional conventional high-voltage converter station
  • FIG. 2 is a schematic diagram of a power transmission mode in the prior art
  • Figure 3 is a schematic view showing the structure and wiring of the first embodiment of the rectifying side UHV converter station of the present invention
  • FIG. 4 is a schematic flow chart showing a first embodiment of a wiring method of the rectifying-side UHV converter station of FIG. 3;
  • Figure 5 is a schematic view showing the wiring of the high and low end valve halls in different positions in the rectification side UHV converter station of the present invention
  • Figure 6 is a schematic view showing the structure and wiring of a second embodiment of the rectifying side UHV converter station of the present invention.
  • FIG. 7 is a second embodiment of the wiring method of the rectifying side UHV converter station of Figure 6; Schematic diagram of the process;
  • Figure 8 is a wiring diagram of a rectification side UHV converter station of the present invention comprising two or more rectification side high-voltage mid-end converter stations;
  • Figure 9 is a schematic view showing the structure and wiring of the first embodiment of the inverter-side UHV converter station of the present invention.
  • Figure 10 is a flow chart showing the first embodiment of the wiring method of the inverter-side UHV converter station of Figure 9;
  • Figure 11 is a schematic view showing the wiring of the high and low end valve halls in different positions in the inverter side side high voltage converter station of the present invention.
  • Figure 12 is a schematic view showing the structure and wiring of a second embodiment of the inverter-side UHV converter station of the present invention.
  • Figure 13 is a flow chart showing a second embodiment of the wiring method of the inverter-side UHV converter station of Figure 12;
  • FIG. 14 is a schematic diagram of wiring of an inverter-side UHV converter station of the present invention including two or more inverter-side ultra-high voltage mid-end converter stations;
  • Figure 15 is a block diagram showing the structure and wiring of a first embodiment of the UHVDC power transmission system of the present invention.
  • Figure 16 is a flow chart showing the first embodiment of the wiring method of the UHV DC power transmission system of Figure 15;
  • Figure 17 is a schematic view showing the connection of the high and low end valve halls of the rectification side and the inverter side of the present invention
  • Figure 18 is a schematic view showing the structure and wiring of the second embodiment of the UHVDC power transmission system of the present invention
  • Figure 19 is a flow chart showing a second embodiment of the wiring method of the UHV DC power transmission system of Figure 18;
  • Figure 20 is a wiring diagram of the rectifier side and the inverter side UHV converter station of the present invention each including two or more UHV mid-end converter stations.
  • the thick solid line represents DC power transmission
  • the thin solid line represents AC power transmission
  • Fig. 3 is a view showing the configuration and wiring of the first embodiment of the rectifying-side UHV converter station of the present invention.
  • the rectification side UHV converter station of this embodiment includes:
  • the rectifying side ultra-high voltage low-end converter station 11 is configured to receive the first alternating current from the first power collecting point, convert the first alternating current into the first low-voltage direct current, and input the high-voltage high-end converter station to the rectifying side;
  • a rectification side UHV high-end converter station 12 configured to receive a second alternating current from the second power collection point and the first low-voltage direct current, and rectify the second alternating current to be superimposed with the first low-voltage direct current to generate a first ultra-high voltage Direct current, and output the first UHV DC through the UHV DC transmission line.
  • the rectification side UHV low-end converter station 11 may include:
  • a first power input module configured to receive a first alternating current from the first power collection point, and transmit the first alternating current to the first power conversion module;
  • a first power conversion module configured to convert the first alternating current power into a first low voltage direct current power, and output to the rectification side ultra high voltage high end converter station;
  • the rectification side UHV high-end converter station 12 may include:
  • a second power input module configured to receive a second alternating current from the second power collection point and transmit the second alternating current to the second power conversion module
  • the second power conversion module is configured to rectify the second alternating current and superimpose the low voltage direct current to generate the first ultra high voltage direct current, and output the first ultra high voltage direct current through the ultra high voltage direct current transmission line.
  • the rectifier side UHV high-end converter station only includes the high-end transformer, excluding the low-end transformer, so that the rectifier-side UHV low-end converter station only includes the low-end transformer and does not include the high-end transformer.
  • Fig. 4 is a flow chart showing the first embodiment of the wiring method of the rectifying-side UHV converter station of Fig. 3.
  • this embodiment may include the following steps:
  • the rectification side UHV low-end converter station receives the first alternating current from the first power collection point, converts the first alternating current into the first low-voltage direct current, and inputs the same to the rectification side UHV high-end converter station;
  • the rectification side UHV high-end converter station receives the second alternating current from the second power collection point and the first low-voltage direct current, and rectifies the second alternating current to be superimposed with the first low-voltage direct current to generate the first ultra-high voltage direct current. And outputting the first UHV DC power through the UHV DC transmission line.
  • the voltage of the first UHV DC can be above ⁇ 750KV, for example, the voltage of the first UHV DC is ⁇ 800KV or ⁇ 1000KV.
  • the voltage of the first low voltage DC power may range from 300 KV to 660 KV.
  • the voltage of the first low voltage DC power is half of the voltage of the first UHV DC power, that is, 400 KV.
  • the above superposition process if the voltage of the first low voltage direct current is 400 kV, and the voltage of the second alternating current after rectification is 400 kV, the voltage of the first extra high voltage direct current after the superposition of the two is 800 kV.
  • the first alternating current and the second alternating current may each include one or more alternating current circuits, and the voltage value and the determining principle are the same as those in the prior art, and will not be described in detail herein.
  • the above-mentioned rectification side UHV high-end converter station may include a high-end valve hall or two high-end valve halls with different polarities, that is, two high-end valve halls may constitute one rectifying side high-voltage high-end end.
  • the converter station can also be constructed by a high-end valve hall Into a rectification side UHV high-end converter station; correspondingly, the rectification side UHV low-end converter station may comprise a low-end valve hall or two low-end valve halls of different polarities.
  • the two high-end valve halls with different polarities can be located at different positions.
  • the two low-end valve halls in the rectification side high-pressure low-end converter station can be in the same or different positions.
  • the two low-end valve halls with different polarities can be located at different positions.
  • the two high-end valve halls in the high-voltage converter station on the rectification side can be in the same or different positions.
  • the two high-end valve halls on the rectification side UHV high-end converter station are in different positions, and the two low-end valve halls of the rectification side UHV low-end converter station are in different positions, as shown in Fig. 5.
  • Fig. 6 is a view showing the configuration and wiring of a second embodiment of the rectifying-side UHV converter station of the present invention.
  • the rectification-side UHV converter station of this embodiment further includes a rectification side UHV low-end converter station 11 and a rectification side, as compared with the first embodiment of the rectification-side UHV converter station. a rectification side UHV mid-end converter station 21 between the UHV high-end converter stations 12, wherein
  • the rectification side ultra-high voltage middle-end converter station 21 is configured to receive the first low-voltage direct current outputted by the alternating current and the rectification side ultra-high voltage low-end converter station 11, and the alternating current is rectified and superimposed with the first low-voltage direct current to generate the first medium-voltage direct current , and input the medium-voltage DC power to the high-voltage high-end converter station on the rectification side.
  • the rectification side UHV mid-end converter station 21 may include:
  • a fifth power input module configured to receive alternating current from a corresponding power collection point, and transmit to the fifth power conversion module
  • the fifth power conversion module is configured to rectify the alternating current and superimpose the input direct current, and output the superimposed direct current.
  • Fig. 7 is a flow chart showing the second embodiment of the wiring method of the rectifying-side UHV converter station of Fig. 6. As shown in FIG. 7, this embodiment may include the following steps:
  • the rectification side UHV low-end converter station receives the first alternating current from the first power collection point, converts the first alternating current into the first low-voltage direct current, and inputs the same to the rectification side ultra-high voltage middle-end converter station;
  • the rectifying side UHV mid-end converter station receives the alternating current and the first low-voltage direct current, and the alternating current is rectified and superposed with the first low-voltage direct current to generate the first medium-voltage direct current, and the first medium-voltage direct current is input to the rectifying side ultra-high voltage.
  • High-end converter station
  • the rectifying side UHV high-end converter station receives the second alternating current and the first medium-voltage direct current from the second power collecting point, rectifies the second alternating current, and superimposes with the first medium-voltage direct current to generate the first ultra-high voltage direct current, and The first UHV DC power is output through the UHV DC transmission line.
  • the voltage of the first UHV direct current can be above ⁇ 750KV, for example, the voltage of the first UHV direct current is 1000KV or ⁇ 1200KV.
  • the voltage of the first low-voltage DC may be 300KV-600KV.
  • the voltage of the first low-voltage DC is the voltage of the UHV DC. 1/3, ie, 333.3KV, in the asymmetric case, the voltage of the first low voltage direct current can be 400KV; the voltage of the first medium voltage direct current can be 600KV ⁇ 900KV, optionally, in the case of symmetry, first The voltage of the medium voltage direct current is 2/3 of the voltage of the first UHV direct current, that is, 666.6 KV. In the case of asymmetry, the voltage of the first medium voltage direct current can be 800 kV.
  • the above superposition process if the voltage of the first low voltage direct current is 400 kV, and the voltage of the alternating current of the input high voltage intermediate converter station of the rectification side is 400 kV, the voltage of the first medium voltage direct current is 800 kV, the second alternating current After the rectified voltage is 200 kV, the voltage of the first UHV DC power superimposed with the first medium voltage direct current is 1000 KV.
  • the voltage of the first UHV DC is ⁇ 1200KV
  • the voltage of a low voltage direct current is 400 kV
  • the voltage of the first medium voltage direct current is 800 kV
  • the voltage of the first low voltage direct current may be 500 kV
  • the voltage of the first medium voltage direct current may be 1000 kV.
  • Each of the first alternating current and the second alternating current may include one or more alternating current circuits, and the magnitude and determination principle of the voltage value are the same as those in the prior art, and will not be described in detail herein.
  • the number of rectification side UHV mid-end converter stations may be one or more.
  • two or more rectification side UHV mid-end converter stations are cascaded in sequence.
  • each of the rectification side UHV mid-range converter stations in the two or more rectification side UHV mid-range converter stations can receive the corresponding AC power and the input DC power, and the corresponding AC power is rectified and input.
  • the DC currents are superimposed and the superimposed DC power is output.
  • the rectification side UHV high-end converter station may include a high-end valve hall or two high-end valve halls of different polarities
  • the rectification side UHV low-end converter station may include a low-end valve hall or two
  • the rectification side UHV mid-end converter station can include a mid-end valve hall or two mid-range valve halls with different polarities.
  • the two high-end valve halls with different polarities can be located at different positions; at this time, the rectification side UHV low-end converter station
  • the two low-end valve halls may be in the same or different positions
  • the two mid-end valve halls in the rectification side UHV mid-end converter station may be in the same or different positions.
  • the two low-end valve halls with different polarities can be located at different positions; at this time, the rectification side UHV high-end converter station
  • the two high-end valve halls can be in the same or different positions
  • the two mid-end valve halls in the rectification side UHV mid-end converter station can be in the same or different positions.
  • the two different-end mid-end valve halls can be located at different positions; at this time, the rectification side UHV high-end converter station
  • the two high-end valve halls can be in the same or different positions
  • the two low-end valve halls in the rectification side UHV low-end converter station can be in the same or different positions.
  • the first power collection point in the power terminal can directly be the rectification side UHV.
  • the low-end converter station is powered, and the second power collection point in the power supply terminal can directly supply power to the rectification side UHV high-end converter station, and the first power collection point and the second power collection point do not need to be connected to the power source. That is, the power supply device 205 in FIG. 2 is no longer needed, thereby reducing the number of outgoing lines of the AC line between the first power collection point, the second power collection point, and the rectification side UHV converter station, thereby reducing transmission costs. And transmission loss, and achieved good economic benefits.
  • the way of setting the rectification side UHV high and low end converter stations in different physical positions respectively solves the problem of high-end transformer transportation, greatly reducing construction costs and reducing freight costs.
  • the second embodiment of the rectification side is compared with the first embodiment, and since the at least one rectification side UHV mid-end converter station is introduced, the rectification side UHV high-end converter station of the second embodiment can output the first ratio The first higher UHV DC of the embodiment is higher. At the same time, the second embodiment can more conveniently collect more distributed AC power sources than the first embodiment.
  • Fig. 9 is a view showing the configuration and wiring of the first embodiment of the inverter-side UHV converter station of the present invention.
  • the inverter side UHV converter station of this embodiment includes:
  • the inverter side UHV high-end converter station 31 is configured to input the first UHV DC power through the UHV DC transmission line, output the third AC power and the second low voltage DC power, and deliver the third AC power to the first load region;
  • the inverter side UHV low-end converter station 32 is configured to convert the second low-voltage DC power into the fourth AC power and transmit to the second load region.
  • the inverter side UHV high-end converter station 31 may include: a fourth power input module, configured to receive the first UHV DC input through the UHV DC transmission line, and transmit the same to the fourth power conversion module;
  • a fourth power conversion module configured to receive the first UHV DC power, output the third AC power and the second low voltage DC power, deliver the third AC power to the first load region, and transmit the second low voltage DC power to the inverter side UHV low Terminal converter station.
  • the inverter side UHV low-end converter station 32 can include:
  • a third power input module configured to receive the second low voltage direct current and transmit the same to the third power conversion module
  • the third power conversion module is configured to convert the second low voltage direct current into the fourth alternating current and transmit to the second load region.
  • Fig. 10 is a flow chart showing the first embodiment of the wiring method of the inverter-side UHV converter station of Fig. 9.
  • this embodiment may include the following steps:
  • the inverter side UHV high-end converter station inputs the first UHV DC power through the UHV DC transmission line, outputs the third AC power and the second low-voltage DC power, and transmits the third AC power to the first load region;
  • the first load zone and the second load zone may be physically different load zones.
  • the voltage of the first UHV DC can be above ⁇ 750KV, for example, the voltage of the first UHV DC is ⁇ 800KV or ⁇ 1000KV.
  • the voltage of the second low voltage DC may be 300KV-660KV.
  • the voltage of the second low voltage DC is half of the voltage of the first UHV DC, that is, 400KV.
  • the foregoing third and fourth alternating currents may include one or more alternating current lines, and the specific quantity may be determined according to the number and requirements of the load ends, wherein each load area may correspond to one or more alternating current lines, and the specific determining manner For the prior art, it will not be described in detail here.
  • the voltage values of the AC lines in the third and fourth AC powers may be determined according to the specific requirements of the load end, and the process of determining is a prior art, and will not be described in detail herein.
  • the above-mentioned inverter side UHV high-end converter station may include a high-end valve hall or two high-end valve halls with different polarities, that is, two inverters can be formed by two high-end halls.
  • the high-voltage high-end converter station can also be composed of a high-end valve hall to form an inverter-side UHV high-end converter station; correspondingly, the above-mentioned inverter-side UHV low-end converter station can include a low-end valve hall or two poles. Different low-end valve halls.
  • the two high-end valve halls with different polarities can be located at different positions.
  • the two low-end valve halls in the inverter-side high-pressure low-end converter station can be in the same or different positions.
  • the two low-end valve halls with different polarities can be located at different positions.
  • the two high-end valve halls in the high-voltage converter station on the inverter side can be in the same or different positions.
  • Figure 12 is a schematic view showing the structure and wiring of a second embodiment of the inverter-side UHV converter station of the present invention.
  • the inverter side UHV converter station of this embodiment further includes an inverter side UHV high-end converter station 31 and An inverter-side UHV mid-end converter station 41 between the inverter side UHV low-end converter station 32, wherein
  • Inverter side UHV mid-range converter station 41 for receiving the inverter side UHV high-end commutation
  • the second medium voltage direct current outputted by the station 31 outputs alternating current and second low voltage direct current, and transmits the second low voltage direct current to the inverter side ultra high voltage low end converter station 32, and sends the output alternating current to the corresponding load region.
  • the inverter side UHV mid-range converter station 41 may include:
  • a sixth power input module configured to receive the input DC power, and transmit the signal to the sixth power conversion module
  • the sixth power conversion module is configured to receive the input DC power, output the AC power and the DC power, and send the discovered AC power to the corresponding load region.
  • Fig. 13 is a flow chart showing the second embodiment of the wiring method of the inverter-side UHV converter station of Fig. 12.
  • this embodiment may include the following steps:
  • the inverter side UHV high-end converter station inputs the first UHV DC power through the UHV DC transmission line, and outputs the third alternating current and the second medium voltage direct current;
  • the inverter side UHV mid-end converter station receives the second medium voltage direct current, outputs the alternating current and the second low voltage direct current, and sends the output alternating current to the corresponding load area;
  • S410 Convert the second low-voltage direct current to the fourth alternating current through the inverter-side UHV low-end converter station and transmit the signal to the second load region.
  • the first load zone, the second load zone, and the corresponding load zone may be physically different load zones.
  • the voltage of the first UHV DC can be above ⁇ 750KV, for example, the voltage of the first UHV DC is ⁇ 1000KV or ⁇ 1200KV.
  • the voltage of the second medium voltage direct current may be 600KV ⁇ 900KV, optionally, in the case of symmetry, the voltage of the second medium voltage direct current is the first UHV direct current 2/3 of the voltage, ie 666.6KV, in the case of asymmetry, the voltage of the second medium voltage direct current can be 800KV; the second low voltage The voltage range of the direct current can be 300KV ⁇ 600KV.
  • the voltage of the second low voltage direct current is 1/3 of the voltage of the first ultra high voltage direct current, that is, 333.3KV, in the case of asymmetry, The voltage of the two low voltage direct current can be 400KV.
  • the power distribution process is exemplified. If the voltage of the first UHV DC is 1000 KV and the voltage delivered to the first load region is 200 KV, the second medium voltage DC is 800 KV, if it is delivered to the inverter side. The voltage of the load region corresponding to the UHV mid-range converter station is 400KV, and the second low-voltage DC power is 400KV.
  • the voltage of the second medium voltage direct current is 800KV
  • the voltage of the second low voltage direct current is 400KV
  • the voltage of the second medium voltage direct current For 1000KV, the voltage of the second low voltage DC is 500KV.
  • the number of inverter side UHV mid-range converter stations may be one or more.
  • two or more inverter-side UHV mid-range converter stations are cascaded in sequence, and two or more inverter-side UHV mid-ranges are connected.
  • Each inverter side UHV mid-range converter station in the converter station receives the input DC power and outputs corresponding AC and DC power.
  • the above-mentioned inverter side UHV high-end converter station may include a high-end valve hall or two high-end valve halls of different polarities
  • the inverter-side UHV low-end converter station may include a low-end valve hall or Two low-end valve halls with different polarities
  • the inverter-side UHV mid-end converter station may include a middle-end valve hall or two different-end central valve halls.
  • the two high-end valve halls with different polarities can be located at different positions; at this time, the inverter side UHV low-end converter station
  • the two lower end valve halls may be in the same or different positions
  • the two mid-end valve halls in the inverter side UHV mid-end converter station may be in the same or different positions.
  • the inverter side UHV low-end converter station includes two low-end valve halls with different polarities
  • the two low-end valve halls with different polarities can be located at different positions; at this time, the two high-end valve halls of the inverter side UHV high-end converter station can be in the same or different positions, and the inverter side UHV mid-range The two mid-end valve halls in the converter station can be in the same or different positions.
  • the two different-end middle-end valve halls can be located at different positions;
  • the two high-end valve halls in the flow station can be in the same or different positions, and the two low-end valve halls in the inverter-side UHV low-end converter station can be in the same or different positions.
  • the inverter side UHV low-end converter station can penetrate deep into The load end shortens the distance between the converter station and the load end, thereby reducing the transmission cost and loss between the inverter side UHV converter station and the load, and, due to the inverter side UHV low-end converter station and The separate construction of the UHV high-end converter station on the inverter side (that is, it may not be in the same physical position), thus the distribution of the load, which facilitates the supply of power to the user.
  • the second embodiment of the inverter side described above can introduce the inverter side of the second embodiment to a plurality of loads more conveniently than the first embodiment by introducing at least one inverter side UHV mid-end converter station.
  • Regional power supply at the same time, also makes the security and stability of the grid better.
  • FIG. 3 to FIG. 8 are for the improvement of the rectification side
  • FIG. 9 to FIG. 14 are for the improvement of the inverter side
  • the two can achieve the transmission cost reduction as long as one of them is applied.
  • the purpose of transmission loss if the two are applied at the same time, the beneficial effects will be more prominent.
  • it is not limited to whether the two are applied separately or simultaneously.
  • Fig. 15 is a view showing the configuration and wiring of a first embodiment of the UHV DC power transmission system of the present invention.
  • the UHV DC transmission system of this embodiment includes the embodiment of FIG.
  • the illustrated rectification side UHV converter station 51 (specifically including the rectifying side UHV low-end converter station 11 and the rectification side UHV high-end converter station 12 connected to each other) and the inverter side shown in the embodiment of FIG.
  • the high-voltage converter station 52 (specifically includes an inverter side UHV high-end converter station 31 and an inverter-side UHV low-end converter station 32 connected to each other).
  • the rectification side UHV high-end converter station in the rectification side UHV converter station and the inverter side UHV high-end converter station in the inverter side UHV converter station are connected by the UHV DC transmission line.
  • Fig. 16 is a flow chart showing the first embodiment of the wiring method of the UHV DC power transmission system of Fig. 15.
  • this embodiment includes the following steps:
  • the rectification side ultra-high voltage low-end converter station receives the first alternating current from the first power collection point, converts the first alternating current into the first low-voltage direct current, and inputs to the rectification side UHV high-end converter station;
  • the rectification side UHV high-end converter station receives the second alternating current and the first low-voltage direct current from the second power collection point, rectifies the second alternating current and superimposes with the first low-voltage direct current to generate the first ultra-high voltage direct current, and passes the special The high voltage direct current transmission line outputs the first ultra high voltage direct current;
  • the inverter side UHV high-end converter station inputs the first UHV DC power through the UHV DC transmission line, and outputs the third alternating current and the second low-voltage direct current;
  • the third alternating current is delivered to the first load area
  • first load region and the second load region may be physically different Load area.
  • the voltage of the first UHV direct current may be ⁇ 750 KV or more, for example, the voltage of the first UHV direct current is ⁇ 800 KV or ⁇ 1000 KV.
  • the voltage of the first low voltage DC may be 300KV-660KV, preferably, the voltage of the first low voltage DC is half of the voltage of the first UHV DC, that is, 400KV;
  • the voltage of the second low voltage direct current may range from 300 kV to 660 KV.
  • the voltage of the second low voltage direct current is half of the voltage of the first ultra high voltage direct current, that is, 400 kV.
  • the first alternating current and the second alternating current may each include one or more alternating current circuits, and the voltage value and the determining principle are the same as those in the prior art, and will not be described in detail herein.
  • the third and fourth alternating currents may also include one or more alternating current lines, and the specific quantity may be determined according to the number and requirements of the load ends, wherein each load area may correspond to one or more alternating current lines, and the specific determining manner is prior art. , will not be described in detail here.
  • the voltage values of the alternating current lines in the third and fourth alternating currents may be determined according to the specific requirements of the load end, and the determined process is prior art and will not be described in detail herein.
  • the rectification side UHV high-end converter station may include a high-end valve hall or two high-end valve halls with different polarities; correspondingly, the rectification side UHV low-end converter station may include a low-end valve. Hall or two low-end valve halls with different polarities.
  • the two high-end valve halls with different polarities can be located at different positions; at this time, the rectification side UHV low-end converter station
  • the two low end valve halls can be in the same or different positions.
  • the two low-end valve halls with different polarities can be located at different positions; at this time, the rectification side UHV high-end converter station
  • the two high-end valve halls can be in the same or different positions.
  • the above-mentioned inverter side UHV high-end converter station can include a high-end valve hall or two high-end valve halls with different polarities, that is, two high-end valve halls can be used to form an inverter side UHV high-end switch.
  • the flow station can also be composed of a high-end valve hall.
  • the variable-side UHV high-end converter station; correspondingly, the above-mentioned inverter-side UHV low-end converter station may include a low-end valve hall or two low-end valve halls of different polarities.
  • the two high-end valve halls with different polarities can be located at different positions; at this time, the inverter side UHV low-end converter station
  • the two lower end valve halls can be in the same or different positions.
  • the two low-end valve halls with different polarities can be located at different positions;
  • the two high-end valve halls in the station can be in the same or different locations.
  • the high-voltage low-end converter station on the rectification side includes two low-end valve halls with different polarities
  • the high-voltage high-end converter station on the rectification side includes two high-end valve halls with different polarities and an ultra-high-voltage high-end converter station on the inverter side.
  • Fig. 18 is a view showing the configuration and wiring of a second embodiment of the UHV DC power transmission system of the present invention.
  • the UHV DC transmission system of this embodiment further includes a rectification side UHV low-end converter station 11 and a rectification side UHV high-end exchange.
  • the rectification side UHV mid-end converter station 21 between the flow stations 12, and the inverter-side UHV between the inverter side UHV high-end converter station 31 and the inverter-side UHV low-end converter station 32 The mid-end converter station 41.
  • Fig. 19 is a flow chart showing the second embodiment of the wiring method of the UHV DC power transmission system of Fig. 18.
  • this embodiment includes the following steps:
  • the rectification side ultra-high voltage low-end converter station receives the first alternating current from the first power collection point, converts the first alternating current into the first low-voltage direct current, and inputs to the rectification side UHV mid-range converter station;
  • the rectifying side ultra-high voltage middle-end converter station receives the alternating current and the first low-voltage direct current, and the alternating current is rectified and superposed with the first low-voltage direct current to generate the first medium-voltage direct current, and the first medium-voltage direct current is input to the rectifying side ultra-high voltage High-end converter station;
  • the rectifying side UHV high-end converter station receives the second alternating current and the first medium voltage direct current from the second power collecting point, rectifies the second alternating current and superimposes with the first medium voltage direct current to generate the first ultra high voltage direct current, and Outputting the first UHV DC power through the UHV DC transmission line;
  • the inverter side UHV high-end converter station inputs the first UHV DC power through the UHV DC transmission line, and outputs the third alternating current and the second medium voltage direct current;
  • the inverter side UHV mid-range converter station receives the second medium voltage direct current, outputs the alternating current and the second low voltage direct current, and sends the output alternating current to the corresponding load area;
  • S618 Convert the second low voltage direct current to the fourth alternating current through the inverter side ultra high voltage low end converter station and transmit to the second load region.
  • the first load zone, the second load zone, and the corresponding load zone may be physically different load zones.
  • the number of rectification side UHV mid-end converter stations may be one or more.
  • two or more rectification side UHV intermediate-end converter stations are cascaded in turn, and each rectification side of two or more rectification-side UHV mid-end converter stations
  • the UHV mid-range converter station receives the corresponding AC power and the input DC power, and the corresponding AC power is rectified and superimposed with the input DC power, and the superimposed DC power is output.
  • the number of inverter side UHV mid-range converter stations may be one or more.
  • two or more inverter-side UHV mid-range converter stations are cascaded in turn, and each of two or more inverter-side UHV mid-range converter stations
  • the inverter side UHV mid-range converter station receives the input DC power and outputs the corresponding AC and DC power.
  • the UHV mid-end converter station is more than two, and the inverter side is in the UHV.
  • the inverter side is in the UHV.
  • the voltage of the first UHV DC can be above ⁇ 750KV, for example, the voltage of the first UHV DC is ⁇ 1000KV or ⁇ 1200KV.
  • the voltage of the first low voltage DC power may be 300KV ⁇ 600KV.
  • the voltage of the first low voltage DC power is the voltage of the first UHV DC power. 1/3, that is, 333.3KV, in the case of asymmetry, the voltage of the first low-voltage direct current can be 400KV.
  • the voltage of the first medium voltage direct current may be 600KV ⁇ 900KV.
  • the voltage of the first medium voltage direct current is 2/3 of the voltage of the first ultra high voltage direct current, that is, 666.6KV, in the non- In the case of symmetry, the voltage of the first medium voltage direct current can be 800 kV.
  • the voltage of the second medium voltage direct current may be 600KV ⁇ 900KV.
  • the voltage of the second medium voltage direct current is 2/3 of the voltage of the first ultra high voltage direct current, that is, 666.6KV, in the non-
  • the voltage of the second medium voltage direct current may be 800 kV;
  • the voltage range of the second low voltage direct current may be 300 kV ⁇ 600 kV, optionally, in the case of symmetry, the voltage of the second low voltage direct current is the first ultra high voltage direct current One-third of the voltage, that is, 333.3 KV, in the case of asymmetry, the voltage of the second low-voltage direct current can be 400 kV.
  • the voltage of the first UHV DC is ⁇ 1200KV
  • the voltage of the first low voltage direct current is 400KV
  • the voltage of the first medium voltage direct current is 800KV
  • the voltage of the first low voltage direct current is 500KV
  • the voltage of the first medium voltage direct current is 1000KV
  • the voltage of the second medium voltage direct current is 800KV
  • the voltage of the second low voltage direct current is 400KV
  • the voltage of the second medium voltage direct current is 1000KV
  • the voltage of the second low voltage DC is 500KV.
  • the rectification side UHV high-end converter station may include a high-end valve hall or two high-end valve halls of different polarities
  • the rectification side UHV low-end converter station may include a low-end valve hall or two Low-end valve hall with different polarity
  • rectification side high-voltage mid-end The converter station can include a mid-port valve hall or two mid-range valve halls of different polarity.
  • the two high-end valve halls with different polarities can be located at different positions; at this time, the rectification side UHV low-end converter station
  • the two low-end valve halls can be in the same or different positions, and the two middle-end valve halls in the rectification-side UHV mid-end converter station can be in the same or different positions when the rectification side UHV low-end converter station includes two
  • the two low-end valve halls of different polarities are different
  • the two low-end valve halls with different polarities can be located at different positions; at this time, the two high-end valve halls of the rectification side UHV high-end converter station can be the same or different
  • the position, the two mid-end halls in the rectification side UHV mid-end converter station can be in the same or different positions.
  • the two different-end mid-end valve halls can be located at different positions; at this time, the rectification side UHV high-end converter station
  • the two high-end valve halls can be in the same or different positions
  • the two low-end valve halls in the rectification side UHV low-end converter station can be in the same or different positions.
  • the above-mentioned inverter side UHV high-end converter station may include a high-end valve hall or two high-end valve halls of different polarities
  • the inverter-side UHV low-end converter station may include a low-end valve hall or Two low-end valve halls with different polarities
  • the inverter-side UHV mid-end converter station may include a middle-end valve hall or two different-end central valve halls.
  • the two high-end valve halls with different polarities can be located at different positions; at this time, the inverter side UHV low-end converter station
  • the two lower end valve halls may be in the same or different positions
  • the two mid-end valve halls in the inverter side UHV mid-end converter station may be in the same or different positions.
  • the two low-end valve halls with different polarities can be located at different positions;
  • the two high-end valve halls in the station can be in the same or different positions, inverting
  • the two mid-end valve halls in the side extra high-pressure mid-end converter station can be in the same or different positions.
  • the two different-end middle-end valve halls can be located at different positions;
  • the two high-end valve halls in the flow station can be in the same or different positions, and the two low-end valve halls in the inverter-side UHV low-end converter station can be in the same or different positions.
  • the first power collection point and the second power collection point need not be further disposed on the rectification side.
  • the convergence of the power supply reduces the number of AC wirings sent to the rectifier side UHV converter station, reduces transmission costs and transmission losses, and obtains good economic benefits.
  • the inverter side UHV high-end converter station and the inverter side UHV low-end converter station are respectively disposed at different physical positions, the electric energy can be directly projected to the plurality of load centers on the inverter side, which is reduced. Power retraction and power loss caused by the transmission of electrical energy between the load regions can also provide power to the load terminals more conveniently.
  • the second embodiment of the UHV DC power transmission system described above is capable of outputting the rectification side UHV high-end converter station of the second embodiment by introducing at least one rectification side UHV mid-end converter station as compared with the first embodiment.
  • the first UHV DC power is higher than that of the first embodiment.
  • the second embodiment can conveniently collect more distributed AC power sources than the first embodiment.
  • the inverter side of the second embodiment can more easily supply power to a plurality of load areas, and at the same time, the safety and stability of the power grid can be further improved. it is good.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Rectifiers (AREA)
  • Direct Current Feeding And Distribution (AREA)

Description

特高压直流输电接线方法、
换流站及特高压直流输电系统
技术领域
本发明涉及特高压技术领域, 特别涉及一种用于整流侧特高压 直流输电的接线方法、 用于逆变侧特高压直流输电的接线方法、 用 于特高压直流输电的接线方法、 整流侧特高压换流站、 逆变侧特高 压换流站及特高压直流输电系统。
背景技术
特高压直流输电工程的常规方案为 "单起点, 单落点 "输电方案, 图 1是现有的常规特高压换流站的布置方式示意图, 即在一个换流 站中布置 2个高端阀厅 101和 2个低端阀厅 102,每个高端阀厅 101 内配置有若干高端变压器, 每个低端阀厅 102内配置有若干低端变 压器。 高、 低端阀厅在同一物理位置, 即每个特高压换流站都包括 高端变压器和低端变压器。
特高压换流站本身是个非常复杂的工程, 由于特高压换流站中 的高端变压器本身的容积和体积均很大, 不便于运输, 所以必须选 址在方便建造的地方, 对于整流侧特高压换流站而言, 需要将多个 大容量电源汇合后通过特高压直流输电线路输出。 然而, 大容量电 源常常位于位置偏僻的地区, 这样, 必须通过交流输电的方式将不 同偏僻地区的多个大容量的电源输送到方便建设特高压换流站的所 在地, 因而, 需要的交流回路很多。 参见图 2, 其是现有技术中的 用于特高压直流输电的接线方式示意图。 在整流侧, 电源端 201通 过电源汇合装置 205将汇合后的多路高压交流电 (其中每路可以为 500KV )传输至特高压换流站 202。 其中, 电源汇合装置 205 中放 置了用于交流电汇合的母线以及与线路汇合相关的设备, 该电源汇 合装置 205用于将电源端 201内的第一电源收集点和第二电源收集 点的电源进行汇合操作。 整流侧特高压换流站 202将接收到的多路 高压交流电转换为特高压直流电后传送给逆变侧特高压换流站 203, 该逆变侧特高压换流站 203将接收到的特高压直流电转换为负荷所 需的交流电后传送给负荷区域 204。 目前,现有技术中的向家坝—— 上海 ±800千伏特特高压直流输电工程中所应用的特高压换流站均釆 用如图 1所示的布置方式和如图 2所示的接线方式。
通过反复的试验和深入的研究后发现, 现有的特高压换流站及 其接线方式至少存在如下问题:
1、 由于处于位置偏僻地区的多个大容量电源与处于方便建造位 置的整流侧特高压换流站之间距离远, 而且又必须采用多路交流的 方式将来自多个大容量电源的电能传输到整流侧特高压换流站, 因 而送入整流侧特高压换流站的交流接线回数过多, 造成传输成本高 且传输损耗大。
2、 由于逆变侧特高压换流站与负荷之间的距离远、 两者之间也 必须采用交流方式进行电能传输, 并且由于逆变侧的负荷区域单落 点导致负荷端用电的不便。
3、 由于整流侧和逆变侧的高端变压器本身的容积和体积均很 大, 不便于运输, 而根据特高压换流站的建设要求, 其中的高端变 压器必须被运往方便建设的指定地点, 因而运输技术难度极大、 成 本高。
4、 由于逆变侧的负荷区域单落点使得巨量电力通过一点 (即, 单落点)馈入逆变侧交流电流电网, 造成大系统容量下的过强短路 电流, 从而导致电网的安全稳定性差。
发明内容
针对多个大容量电源与整流侧特高压换流站之间距离远且又必 须采用多路交流的方式进行电能传输方式引起的送入整流侧特高压 换流站的交流接线回数过多的技术问题, 本发明提供了一种用于整 流侧特高压直流输电的接线方法和整流侧特高压换流站。
根据本发明的一方面, 提供了一种用于整流侧特高压直流输电 的接线方法, 包括分别设置整流侧特高压高端换流站和整流侧特高 压低端换流站; 整流侧特高压低端换流站接收来自第一电源收集点 的第一交流电, 将第一交流电转换为第一低压直流电, 并输入到整 流侧特高压高端换流站; 整流侧特高压高端换流站接收来自第二电 源收集点的第二交流电及第一低压直流电, 将第二交流电整流后与 第一低压直流电叠加, 产生第一特高压直流电, 并通过特高压直流 输电线路输出第一特高压直流电。
根据本发明用于整流侧特高压直流输电的接线方法的一个实施 例, 整流侧特高压高端换流站可以包括两个极性不同的高端阀厅; 整流侧特高压低端换流站可以包括两个极性不同的低端阀厅。
根据本发明用于整流侧特高压直流输电的接线方法的另一实施 例, 两个极性不同的高端阀厅位于不同的位置和 /或两个极性不同的 低端阀厅位于不同的位置。
根据本发明的另一方面, 还提供了一种整流侧特高压换流站, 包括整流侧特高压低端换流站, 用于接收来自第一电源收集点的第 一交流电, 将第一交流电转换为第一低压直流电, 并输入到整流侧 特高压高端换流站; 整流侧特高压高端换流站, 用于接收来自第二 电源收集点的第二交流电及第一低压直流电, 将第二交流电整流后 与第一低压直流电叠加, 产生第一特高压直流电, 并通过特高压直 流输电线路输出第一特高压直流电。
根据本发明整流侧特高压换流站的一个实施例, 整流侧特高压 低端换流站包括第一电源愉入模块, 用于接收来自第一电源收集点 的第一交流电, 将第一交流电传送至第一电源变换模块; 第一电源 变换模块, 用于将第一交流电转换为第一低压直流电, 并输出到整 流侧特高压高端换流站。
根据本发明整流侧特高压换流站的另一实施例, 整流侧特高压 高端换流站包括第二电源输入模块, 用于接收来自第二电源收集点 的第二交流电并传送至第二电源变换模块; 第二电源变换模块, 用 于将第二交流电整流后与第一低压直流电叠加, 产生第一特高压直 流电, 并通过特高压直流输电线路输出第一特高压直流电。
根据本发明整流侧特高压换流站的又一实施例, 整流侧特高压 高端换流站包括两个极性不同的高端阀厅; 整流侧特高压低端换流 站包括两个极性不同的低端阀厅。
才 据本发明整流侧特高压换流站的另一实施例, 两个极性不同 的高端阀厅位于不同的位置和 /或两个极性不同的低端阀厅位于不 同的位置。
根据本发明的又一方面, 还提供了一种用于整流侧特高压直流 输电的接线方法, 包括分别设置整流侧特高压高端换流站、 整流侧 特高压低端换流站和整流侧特高压中端换流站; 整流侧特高压低端 换流站接收来自第一电源收集点的第一交流电, 将第一交流电转换 为第一低压直流电, 并输入到整流侧特高压中端换流站; 整流侧特 高压中端换流站接收交流电及第一低压直流电, 交流电经整流后与 第一低压直流电叠加, 产生第一中压直流电, 并将第一中压直流电 输入到整流侧特高压高端换流站; 整流侧特高压高端换流站接收来 自第二电源收集点的第二交流电及第一中压直流电, 将第二交流电 整流后与第一中压直流电叠加, 产生第一特高压直流电, 并通过特 高压直流输电线路输出第一特高压直流电。
根据本发明用于整流侧特高压直流输电接线方法的一个实施 例, 整流侧特高压中端换流站的数量是一个或多个。
根据本发明用于整流侧特高压直流输电接线方法的另一实施 例, 在整流侧特高压中端换流站为两个以上时, 依次级联两个以上 整流侧特高压中端换流站, 该方法还包括每个整流侧特高压中端换 流站接收相应的交流电及输入的直流电, 相应的交流电经整流后与 输入的直流电相叠加, 并输出聱加后的直流电。
根据本发明用于整流侧特高压直流输电接线方法的又一实施 例, 整流侧特高压高端换流站包括两个极性不同的高端岡厅; 整流 侧特高压中端换流站包括两个极性不同的中端阀厅; 整流侧特高压 低端换流站包括两个极性不同的低端阀厅。
根据本发明用于整流侧特高压直流输电接线方法的再一实施 例, 两个极性不同的高端阀厅位于不同的位置和 /或两个极性不同的 中端阀厅位于不同的位置和 /或两个极性不同的低端阀厅位于不同 的位置。
根据本发明的再一方面, 还提供了一种整流侧特高压换流站, 包括整流侧特高压低端换流站, 用于接收来自第一电源收集点的第 一交流电, 将第一交流电转换为第一低压直流电, 并输入到整流侧 特高压中端换流站; 整流侧特高压中端换流站, 用于接收交流电及 第一低压直流电, 交流电经整流后与第一低压直流电叠加, 产生第 一中压直流电, 并将第一中压直流电输入到整流侧特高压高端换流 站; 整流侧特高压高端换流站, 用于接收来自第二电源收集点的第 二交流电及第一中压直流电, 将第二交流电整流后与第一中压直流 电叠加, 产生第一特高压直流电, 并通过特高压直流输电线路输出 第一特高压直流电。
才艮据本发明整流侧特高压换流站的一个实施例, 整流侧特高压 低端换流站包括第一电源输入模块, 用于接收来自第一电源收集点 的第一交流电, 将第一交流电传送至第一电源变换模块; 第一电源 变换模块, 用于将第一交流电转换为第一低压直流电, 并输出到与 整流侧特高压低端换流站相连的整流侧特高压中端换流站。
才 据本发明整流侧特高压换流站的另一实施例, 整流侧特高压 中端换流站的数量是一个或多个。
才艮据本发明整流侧特高压换流站的又一实施例, 在整流侧特高 压中端换流站为两个以上时, 依次级联两个以上整流侧特高压中端 换流站 0
根据本发明整流侧特高压换流站的再一实施例, 整流侧特高压 中端换流站包括第五电源输入模块, 用于接收来自相应电源收集点 的交流电, 并传送至第五电源变换模块; 第五电源变换模块, 用于 将交流电整流后与输入的直流电叠加, 并输出叠加后的直流电。
根据本发明整流侧特高压换流站的再一实施例, 整流侧特高压 高端换流站包括第二电源输入模块, 用于接收来自第二电源收集点 的第二交流电并传送至第二电源变换模块; 第二电源变换模块, 用 于将第二交流电整流后与输入的直流电叠加, 产生第一特高压直流 电, 并通过特高压直流输电线路输出第一特高压直流电。
根据本发明整流侧特高压换流站的再一实施例, 整流侧特高压 高端换流站包括两个极性不同的高端阀厅; 整流侧特高压中端换流 站包括两个极性不同的中端阀厅; 整流侧特高压低端换流站包括两 个极性不同的低端阀厅。
根据本发明整流侧特高压换流站的再一实施例, 两个极性不同 的高端阀厅位于不同的位置和 /或两个极性不同的中端阀厅位于不 同的位置和 /或两个极性不同的低端阀厅位于不同的位置。
本发明的用于整流侧特高压直流输电接线方法和整流侧特高压 换流站, 由于将整流侧特高压高端换流站与整流侧特高压低端换流 站分开设置, 所以不需要再将第一电源收集点和第二电源收集点进 行电源的汇合, 因此, 减少了第一电源收集点、 第二电源收集点与 整流侧特高压换流站之间的交流线路的出线回数, 降低了传输成本 及传输损耗, 获得了较好的经济效益。 此外, 由于整流侧特高压高、 低端换流站可以分别设置, 因而解决了高端变压器运输难的问题, 大大减少了建设成本, 降低了运费。 上述实施例还可以更方便分散 电源的接入, 例如, 可以将距离在 200 - 300公里内的两个或者更多 个中型电站或电厂输出的功率打捆并实现超远距离的外送, 所以可 以节约大量交流送电线路, 减少了功率损耗。
针对逆变侧特高压换流站与负荷之间距离远和负荷区域单落点 方式所引起的负荷端使用供电不便的技术问题, 本发明还提供了一 种用于逆变侧特高压直流输电的接线方法和逆变侧特高压换流站。
根据本发明的一方面, 提供了一种用于逆变侧特高压直流输电 的接线方法, 包括分别设置逆变侧特高压高端换流站和逆变侧特高 压低端换流站; 逆变侧特高压高端换流站通过特高压直流输电线路 输入第一特高压直流电, 输出第三交流电和第二低压直流电, 将第 三交流电输送至第一负荷区域; 通过逆变侧特高压低端换流站将第 二低压直流电转换为第四交流电并传输至第二负荷区域。
根据本发明用于逆变侧特高压直流输电的接线方法的一个实施 例, 逆变侧特高压高端换流站可以包括两个极性不同的高端阀厅; 逆变侧特高压低端换流站可以包括两个极性不同的低端阀厅。
根据本发明用于逆变侧特高压直流输电的接线方法的另一实施 例, 两个极性不同的高端阀厅位于不同的位置和 /或两个极性不同的 低端阀厅位于不同的位置。
根据本发明的另一方面, 还提供了一种逆变侧特高压换流站, 包括逆变侧特高压高端换流站, 用于通过特高压直流输电线路输入 第一特高压直流电, 输出第三交流电和第二低压直流电, 并将第三 交流电输送至第一负荷区域; 逆变侧特高压低端换流站, 用于将第 二低压直流电转换为第四交流电并传输至第二负荷区域。
根据本发明逆变侧特高压换流站的一个实施例, 逆变侧特高压 高端换流站包括第四电源输入模块, 用于接收通过特高压直流输电 线路输入的第一特高压直流电, 并传送给第四电源变换模块; 第四 电源变换模块, 用于接收第一特高压直流电, 输出第三交流电和第 二低压直流电, 将第三交流电输送至第一负荷区域, 并将第二低压 直流电传输至逆变侧特高压低端换流站。
根据本发明逆变侧特高压换流站的另一实施例, 逆变侧特高压 低端换流站包括第三电源输入模块, 用于接收第二低压直流电, 并 传送给第三电源变换模块; 第三电源变换模块, 用于将第二低压直 流电转换为第四交流电, 并传输至第二负荷区域。
才艮据本发明逆变侧特高压换流站的又一实施例, 逆变侧特高压 高端换流站包括两个极性不同的高端阀厅; 逆变侧特高压低端换流 站包括两个极性不同的低端阀厅。 根据本发明逆变侧特高压换流站的再一实施例, 两个极性不同 的高端阀厅位于不同的位置和 /或两个极性不同的低端阀厅位于不 同的位置。
根据本发明的又一方面, 还提供了一种用于逆变侧特高压直流 输电的接线方法, 包括分别设置逆变侧特高压高端换流站、 逆变侧 特高压低端换流站和逆变侧特高压中端换流站; 逆变侧特高压高端 换流站通过特高压直流输电线路输入第一特高压直流电, 输出第三 交流电和第二中压直流电; 将第三交流电输送至第一负荷区域; 逆 变侧特高压中端换流站接收第二中压直流电, 输出交流电和第二低 压直流电, 并将输出的交流电送至对应的负荷区域; 通过逆变侧特 高压低端换流站将第二低压直流电转换为第四交流电并传输至第二 负荷区域。
根据本发明用于逆变侧特高压直流输电接线方法的一个实施 例, 逆变侧特高压中端换流站的数量是一个或多个。
根据本发明用于逆变侧特高压直流输电接线方法的另一实施 例, 在逆变侧特高压中端换流站为两个以上时, 依次级联两个以上 逆变侧特高压中端换流站, 该方法还包括: 每个逆变侧特高压中端 换流站接收输入的直流电, 输出相应的交流电和直流电, 并将相应 的交流电送至对应的负荷区域。
根据本发明用于逆变侧特高压直流输电接线方法的又一实施 例, 逆变侧特高压高端换流站包括两个极性不同的高端阀厅; 逆变 侧特高压中端换流站包括两个极性不同的中端阀厅; 逆变侧特高压 低端换流站包括两个极性不同的低端阀厅。
根据本发明用于逆变侧特高压直流输电接线方法的再一实施 例, 两个极性不同的高端阀厅位于不同的位置和 /或两个极性不同的 中端阀厅位于不同的位置和 /或两个极性不同的低端阀厅位于不同 的位置。
根据本发明的再一方面, 还提供了一种逆变侧特高压换流站, 包括逆变侧特高压高端换流站, 用于通过特高压直流输电线路输入 第一特高压直流电, 输出第三交流电和第二中压直流电, 并将第三 交流电输送至第一负荷区域, 将第二中压直流电输入到逆变侧特高 压中端换流站; 逆变侧特高压中端换流站, 用于接收第二中压直流 电, 输出交流电和第二低压直流电, 并将输出的交流电送至对应的 负荷区域; 逆变侧特高压低端换流站, 用于接收第二低压直流电, 并转换为第四交流电传输至第二负荷区域。
才艮据本发明逆变侧特高压换流站的一个实施例, 逆变侧特高压 高端换流站包括第四电源输入模块, 用于接收通过特高压直流输电 线路输入的第一特高压直流电, 并传送给第四电源变换模块; 第四 电源变换模块, 用于接收第一特高压直流电, 输出第三交流电和第 二中压直流电, 将第三交流电输送至第一负荷区域, 并将第二中压 直流电传输至与逆变侧特高压高端换流站相连的逆变侧特高压中端 换流站。
才艮据本发明逆变侧特高压换流站的另一实施例, 逆变侧特高压 中端换流站的数量是一个或多个。
才艮据本发明逆变侧特高压换流站的又一实施例, 在逆变侧特高 压中端换流站为两个以上时, 依次级联两个以上逆变侧特高压中端 换流站- 才艮据本发明逆变侧特高压换流站的再一实施例, 逆变侧特高压 中端换流站包括第六电源输入模块, 用于接收输入的直流电, 并传 送至第六电源变换模块; 笫六电源变换模块, 用于接收输入的直流 电, 并输出交流电和直流电, 并将输出的交流电送至对应的负荷区 域。
才艮据本发明逆变侧特高压换流站的再一实施例, 逆变侧特高压 低端换流站包括第三电源输入模块, 用于接收输入的直流电, 并传 送给第三电源变换模块; 第三电源变换模块, 用于将输入的直流电 转换为第四交流电, 并传输至第二负荷区域。
根据本发明逆变侧特高压换流站的再一实施例, 逆变侧特高压 0 001349
高端换流站包括两个极性不同的高端阀厅; 逆变侧特高压中端换流 站包括两个极性不同的中端阀厅; 逆变侧特高压低端换流站包括两 个极性不同的低端阀厅。
根据本发明逆变侧特高压换流站的再一实施例, 逆变侧特高压 高端换流站的两个极性不同的高端阀厅位于不同的位置和 /或逆变 侧特高压中端换流站的两个极性不同的中端阀厅位于不同的位置和 /或逆变侧特高压低端换流站的两个极性不同的低端阀厅位于不同 的位置。
本发明的用于逆变侧特高压直流输电接线方法和逆变侧特高压 换流站, 由于将逆变侧特高压高端换流站与逆变侧特高压低端换流 站分开设置, 所以可以将电能直接投射到多个负荷中心, 不仅减少 了由于负荷区域之间传输电能所引起的功率折返和功率损耗, 同时 还能够更方便地向负荷端提供电能。 逆变侧通过设置多个负荷中心 的这种逐级疏散能量的方式可以方便地接入到各负荷区的交流系 统。 此外, 由于逆变侧特高压高端换流站和逆变侧特高压低端换流 站分开建设, 可以使电能分别直接输送至第一负荷区域和第二负荷 区域, 降低了逆变侧特高压换流站与负荷之间的传输成本, 便于将 电能输送至不同的负荷区域, 同时, 还解决了高端变压器运输难的 问题, 大大减少了建设成本, 降低了运费。 而且, 与现有技术的单 落点相比, 本发明采用多落点的方式可以简化逆变侧的网络结构, 不会由于系统容量过大而引^部交流网架的短路电流过强所导致 的短路电流超标, 从而有效地解决了现有技术中由于逆变侧的负荷 区域单落点所导致的巨量电力通过一点馈入逆变侧交流电流电网而 引起的电网安全稳定性差的问题; 还解决了并联多端的可靠性较差 的问题, 一个换流器切除, 必须切除该极性所有的换流器。
针对多个大容量电源与整流侧特高压换流站之间距离远且又必 须采用多路交流的方式进行电能传输方式引起的送入整流侧特高压 换流站的交流接线回数过多的技术问题, 本发明还提供了一种用于 特高压直流输电的接线方法和特高压直流输电系统。 根据本发明的一方面, 提供了一种用于特高压直流输电的接线 方法, 包括分别设置整流侧特高压高端换流站和整流侧特高压低端 换流站; 分别设置逆变侧特高压高端换流站和逆变侧特高压低端换 流站; 整流侧特高压低端换流站接收来自第一电源收集点的第一交 流电, 将第一交流电转换为第一低压直流电, 并输入到整流侧特高 压高端换流站; 整流侧特高压高端换流站接收来自第二电源收集点 的第二交流电及第一低压直流电, 将第二交流电整流后与第一低压 直流电叠加, 产生第一特高压直流电, 并通过特高压直流输电线路 输出第一特高压直流电; 逆变侧特高压高端换流站通过特高压直流 输电线路输入第一特高压直流电, 输出第三交流电和第二低压直流 电; 将第三交流电输送至第一负荷区域; 通过逆变侧特高压低端换 流站将第二低压直流电转换为第四交流电并传输至第二负荷区域。
根据本发明用于特高压直流输电的接线方法的一个实施例, 整 流侧特高压高端换流站包括两个极性不同的高端阀厅; 整流侧特高 压低端换流站包括两个极性不同的低端阀厅。
根据本发明用于特高压直流输电的接线方法的另一实施例, 两 个极性不同的高端阀厅位于不同的位置和 /或两个极性不同的低端 阀厅位于不同的位置。
根据本发明用于特高压直流输电的接线方法的又一实施例, 逆 变侧特高压高端换流站包括两个极性不同的高端阀厅; 逆变侧特高 压低端换流站包括两个极性不同的低端阀厅。
根据本发明用于特高压直流输电的接线方法的再一实施例, 逆 变侧特高压高端换流站的两个极性不同的高端阀厅位于不同的位置 和 /或逆变侧特高压低端换流站的两个极性不同的低端阀厅位于不 同的位置。
根据本发明的另一方面, 还提供了一种用于特高压直流输电的 接线方法, 包括分别设置整流侧特高压高端换流站、 整流侧特高压 低端换流站和整流侧特高压中端换流站; 分别设置逆变侧特高压高 端换流站、 逆变侧特高压低端换流站和逆变侧特高压中端换流站; 整流侧特高压低端换流站接收来自第一电源收集点的第一交流电, 将第一交流电转换为第一低压直流电, 并输入到整流侧特高压中端 换流站; 整流侧特高压中端换流站接收交流电及第一低压直流电, 交流电经整流后与第一 4氏压直流电叠加, 产生第一中压直流电, 并 将第一中压直流电输入到整流侧特高压高端换流站; 整流侧特高压 高端换流站接收来自第二电源收集点的第二交流电及第一中压直流 电, 将第二交流电整流后与第一中压直流电叠加, 产生第一特高压 直流电, 并通过特高压直流输电线路输出第一特高压直流电; 逆变 侧特高压高端换流站通过特高压直流输电线路输入第一特高压直流 电, 输出第三交流电和第二中压直流电; 将第三交流电输送至第一 负荷区域; 逆变侧特高压中端换流站接收第二中压直流电, 输出交 流电和第二低压直流电, 并将输出的交流电送至对应的负荷区域; 通过逆变侧特高压低端换流站将第二低压直流电转换为第四交流电 并传输至第二负荷区域。
根据本发明用于特高压直流输电接线方法的一个实施例, 整流 侧特高压中端换流站的数量是一个或多个。
根据本发明用于特高压直流输电接线方法的另一实施例, 在整 流侧特高压中端换流站为两个以上时, 依次级联两个以上整流侧特 高压中端换流站, 该方法还包括每个整流侧特高压中端换流站接收 相应的交流电及输入的直流电, 相应的交流电经整流后与输入的直 流电相叠加, 并输出叠加后的直流电。
根据本发明用于特高压直流输电接线方法的再一实施例, 逆变 侧特高压中端换流站的数量是一个或多个。
根据本发明用于特高压直流输电接线方法的再一实施例, 在逆 变侧特高压中端换流站为两个以上时, 依次级联两个以上逆变侧特 高压中端换流站, 该方法还包括每个逆变侧特高压中端换流站接收 输入的直流电, 输出相应的交流电和直流电, 并将相应的交流电送 至对应的负荷区域。
根据本发明用于特高压直流输电接线方法的再一实施例, 整流 侧特高压高端换流站包括两个极性不同的高端阀厅; 整流侧特高压 中端换流站包括两个极性不同的中端阀厅; 整流侧特高压低端换流 站包括两个极性不同的低端阀厅。
根据本发明用于特高压直流输电接线方法的再一实施例, 两个 极性不同的高端阀厅位于不同的位置和 /或两个极性不同的中端阀 厅位于不同的位置和 /或两个极性不同的低端阀厅位于不同的位置。
根据本发明用于特高压直流输电接线方法的再一实施例, 逆变 侧特高压高端换流站包括两个极性不同的高端阀厅; 逆变侧特高压 中端换流站包括两个极性不同的中端阀厅; 逆变侧特高压低端换流 站包括两个极性不同的低端阀厅。
根据本发明用于特高压直流输电接线方法的再一实施例, 逆变 侧特高压高端换流站的两个极性不同的高端阀厅位于不同的位置和
/或逆变侧特高压中端换流站的两个极性不同的中端阀厅位于不同 的位置和 /或逆变侧特高压低端换流站的两个极性不同的低端阀厅 位于不同的位置。
根据本发明的又一方面, 还提供了一种特高压直流输电系统, 包括上述实施例的整流侧特高压换流站和逆变侧特高压换流站, 其 中, 整流侧特高压换流站中的整流侧特高压高端换流站与逆变侧特 高压换流站中的逆变侧特高压高端换流站通过特高压直流输电线路 相连。
根据本发明特高压直流输电系统的一个实施例, 整流侧特高压 高端换流站包括两个极性不同的高端阀厅; 整流侧特高压低端换流 站包括两个极性不同的低端阀厅。
根据本发明特高压直流输电系统的另一实施例, 两个极性不同 的高端阀厅位于不同的位置和 /或两个极性不同的低端阀厅位于不 同的位置。
才艮据本发明特高压直流输电系统的又一实施例, 逆变侧特高压 高端换流站包括两个极性不同的高端阀厅; 逆变侧特高压低端换流 站包括两个极性不同的低端阀厅。 根据本发明特高压直流输电系统的再一实施例, 逆变侧特高压 高端换流站的两个极性不同的高端岡厅位于不同的位置和 /或逆变 侧特高压低端换流站的两个极性不同的低端阀厅位于不同的位置。
才艮据本发明特高压直流输电系统的再一实施例, 整流侧特高压 中端换流站的 量是一个或多个。
根据本发明特高压直流输电系统的再一实施例, 在整流侧特高 压中端换流站为两个以上时, 依次级联两个以上整流侧特高压中端 换流站。
根据本发明特高压直流输电系统的再一实施例, 逆变侧特高压 中端换流站的数量是一个或多个。
根据本发明特高压直流输电系统的再一实施例, 在逆变侧特高 压中端换流站为两个以上时, 依次级联两个以上逆变侧特高压中端 换流站
才艮据本发明特高压直流输电系统的再一实施例, 整流侧特高压 高端换流站包括两个极性不同的高端阀厅; 整流侧特高压中端换流 站包括两个极性不同的中端阀厅; 整流侧特高压低端换流站包括两 个极性不同的低端阀厅。
才艮据本发明特高压直流输电系统的再一实施例, 两个极性不同 的高端阀厅位于不同的位置和 /或两个极性不同的中端阀厅位于不 同的位置和 /或两个极性不同的低端阀厅位于不同的位置。
根据本发明特高压直流输电系统的再一实施例, 逆变侧特高压 高端换流站包括两个极性不同的高端阀厅; 逆变侧特高压中端换流 站包括两个极性不同的中端阀厅; 逆变侧特高压低端换流站包括两 个极性不同的低端阀厅。
才艮据本发明特高压直流输电系统的再一实施例, 逆变侧特高压 高端换流站的两个极性不同的高端阀厅位于不同的位置和 /或逆变 侧特高压中端换流站的两个极性不同的中端阀厅位于不同的位置和 /或逆变侧特高压低端换流站的两个极性不同的低端阀厅位于不同 的位置。
本发明的用于特高压直流输电接线方法和特高压直流输电系 统, 由于将整流侧特高压高端换流站与整流侧特高压低端换流站分 开设置, 以及将逆变侧特高压高端换流站与逆变侧特高压低端换流 站分开设置, 不仅在整流侧不需要再将第一电源收集点和第二电源 收集点进行电源的汇合, 减少了送入整流侧特高压换流站的交流接 线回数, 降低了传输成本及传输损耗, 获得了较好的经济效益; 而 且在逆变侧可以将电能直接投射到多个负荷中心, 在减少了由于负 荷区域之间传输电能所引起的功率折返和功率损耗的同时还能够方 便负荷端使用所提供的电能。 附图说明
为了更清楚地说明本发明实施例和现有技术中的技术方案, 下 面将对实施例和现有技术描述中所需要使用的附图作简单地介绍, 显而易见地, 下面描述中的附图仅仅是本发明的一些实施例, 对于 本领域普通技术人员来讲, 在不付出创造性劳动的前提下, 还可以 根据这些附图获得其他的附图。
图 1是现有的常规特高压换流站的布置方式示意图;
图 2是现有技术中输电方式示意图;
图 3是本发明整流侧特高压换流站的第一实施例的结构和接线 示意图;
图 4是图 3的整流侧特高压换流站的接线方法的第一实施例的 流程示意图;
图 5是本发明整流侧特高压换流站中的高低端阀厅处于不同位 置的接线示意图;
图 6是本发明整流侧特高压换流站的第二实施例的结构和接线 示意图;
图 7是图 6的整流侧特高压换流站的接线方法的第二实^ <例的 流程示意图;
图 8是本发明整流侧特高压换流站中包含两个以上整流侧特高 压中端换流站的接线示意图;
图 9是本发明逆变侧特高压换流站的第一实施例的结构和接线 示意图;
图 10是图 9的逆变侧特高压换流站的接线方法的第一实施例的 流程示意图;
图 11是本发明逆变侧侧特高压换流站中的高低端阀厅处于不同 位置的接线示意图;
图 12是本发明逆变侧特高压换流站的第二实施例的结构和接线 示意图;
图 13是图 12的逆变侧特高压换流站的接线方法的第二实施例 的流程示意图;
图 14是本发明逆变侧特高压换流站中包含两个以上逆变侧特高 压中端换流站的接线示意图;
图 15是本发明特高压直流输电系统的第一实施例的结构和接线 示意图;
图 16是图 15的特高压直流输电系统的接线方法的第一实施例 的流程示意图;
图 17是本发明整流侧和逆变侧的高低端阀厅的连接示意图; 图 18是本发明特高压直流输电系统的第二实施例的结构和接线 示意图;
图 19是图 18的特高压直流输电系统的接线方法的第二实施例 的流程示意图;
图 20是本发明整流侧和逆变侧特高压换流站中均包含两个以上 特高压中端换流站的接线示意图。 具体实施方式 下面将结合本发明实施例中的附图, 对本发明实施例中的技术 方案进行清楚、 完整地描述, 显然, 所描述的实施例仅仅 本发明 一部分实施例, 而不是全部的实施例。 基于本发明中的实施例, 本 领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他 实施例, 都属于本发明保护的范围。
在以下结构和接线方式的示意图中, 粗实线代表直流输电, 细 实线代表交流输电。
图 3是本发明整流侧特高压换流站的第一实施例的结构和接线 示意图。
如图 3所示, 该实施例的整流侧特高压换流站包括:
整流侧特高压低端换流站 11, 用于接收来自第一电源收集点的 第一交流电, 将第一交流电转换为第一低压直流电, 并输入到整流 侧特高压高端换流站;
整流侧特高压高端换流站 12, 用于接收来自第二电源收集点的 第二交流电及上述第一低压直流电, 将第二交流电经整流后与第一 低压直流电相叠加以产生第一特高压直流电, 并通过特高压直流输 电线路输出第一特高压直流电。
具体地, 整流侧特高压低端换流站 11可以包括:
第一电源输入模块, 用于接收来自第一电源收集点的第一交流 电, 将第一交流电传送至第一电源变换模块;
第一电源变换模块,用于将第一交流电转换为第一低压直流电, 并输出到整流侧特高压高端换流站;
整流侧特高压高端换流站 12可以包括:
第二电源输入模块, 用于接收来自第二电源收集点的第二交流 电并传送至第二电源变换模块;
第二电源变换模块, 用于将第二交流电整流后与第 低压直流 电叠加, 产生第一特高压直流电, 并通过特高压直流输电线路输出 第一特高压直流电。 令整流侧特高压高端换流站中只包括高端变压器, 不包括低端 变压器, 令整流侧特高压低端换流站中只包括低端变压器不包括高 端变压器。
图 4是图 3的整流侧特高压换流站的接线方法的第一实施例的 流程示意图。
如图 4所示, 该实施例可以包括以下步骤:
S102, 分别设置整流侧特高压高端换流站和整流侧特高压低端 换流站, 即, 这两个换流站可以处于不同的物理位置;
S104, 整流侧特高压低端换流站接收来自第一电源收集点的第 一交流电, 将第一交流电转换为第一低压直流电, 并输入到整流侧 特高压高端换流站;
S106, 整流侧特高压高端换流站接收来自第二电源收集点的第 二交流电及上述第一低压直流电, 将笫二交流电经整流后与第一低 压直流电相叠加以产生第一特高压直流电, 并通过特高压直流输电 线路输出第一特高压直流电。
其中,第一特高压直流电的电压范围可以是 ±750KV以上,例如, 第一特高压直流电的电压为 ±800KV或 ±1000KV。
当第一特高压直流电的电压为 ±800KV时,第一低压直流电的电 压范围可以是 300KV-660KV, 优选地, 第一低压直流电的电压为 第一特高压直流电的电压的一半, 即, 400KV。
举例说明上述叠加过程,如果第一低压直流电的电压为 400KV, 第二交流电经整流后的电压为 400KV, 则这两者叠加后的第一特高 压直流电的电压为 800KV。
上述第一交流电和第二交流电均可以包括一条或多条交流回 路, 其电压值大小及确定原则与现有技术相同, 在此不再详细说明。
需要说明的是, 上述整流侧特高压高端换流站可以包括一个高 端阀厅或两个极性不同的高端阀厅, 也就是说, 既可以由两个高端 阀厅构成一个整流侧特高压高端换流站, 也可以由一个高端阀厅构 成一个整流侧特高压高端换流站; 相应地, 上述整流侧特高压低端 换流站可以包括一个低端阀厅或两个极性不同的低端阀厅。
当整流侧特高压高端换流站包括两个极性不同的高端阀厅时, 这两个极性不同的高端阀厅可以位于不同的位置。 此时整流侧特高 压低端换流站中的两个低端阀厅可以处于相同或不同的位置。
当整流侧特高压低端换流站包括两个极性不同的低端阀厅时, 这两个极性不同的低端阀厅可以位于不同的位置。 此时整流侧特高 压高端换流站中的两个高端阀厅可以处于相同或不同的位置。
在整流侧特高压高端换流站的两个高端阀厅处于不同的位置, 且整流侧特高压低端换流站的两个低端阀厅处于不同的位置时, 如 图 5所示。
图 6是本发明整流侧特高压换流站的第二实施例的结构和接线 示意图。
如图 6所示, 与整流侧特高压换流站的第一实施例相比, 该实 施例的整流侧特高压换流站还包括介于整流侧特高压低端换流站 11 和整流侧特高压高端换流站 12之间的整流侧特高压中端换流站 21, 其中,
整流侧特高压中端换流站 21, 用于接收交流电及整流侧特高压 低端换流站 11输出的第一低压直流电,交流电经整流后与第一低压 直流电叠加, 产生第一中压直流电, 并将笫一中压直流电输入到整 流侧特高压高端换流站。
具体地, 整流侧特高压中端换流站 21可以包括:
第五电源输入模块, 用于接收来自相应电源收集点的交流电, 并传送至第五电源变换模块;
第五电源变换模块, 用于将交流电整流后与输入的直流电叠加, 并输出叠加后的直流电。
图 7是图 6的整流侧特高压换流站的接线方法的第二实施例的 流程示意图。 如图 7所示, 该实施例可以包括以下步骤:
S202, 分别设置整流侧特高压高端换流站、 整流侧特高压低端 换流站和整流侧特高压中端换流站;
S204, 整流侧特高压低端换流站接收来自第一电源收集点的第 一交流电, 将第一交流电转换为第一低压直流电, 并输入到整流侧 特高压中端换流站;
S206,整流侧特高压中端换流站接收交流电及第一低压直流电, 交流电经整流后与第一低压直流电叠加, 产生第一中压直流电, 并 将第一中压直流电输入到整流侧特高压高端换流站;
S208, 整流侧特高压高端换流站接收来自第二电源收集点的第 二交流电及第一中压直流电, 将第二交流电整流后与第一中压直流 电叠加, 产生第一特高压直流电, 并通过特高压直流输电线路输出 第一特高压直流电。
其中,第一特高压直流电的电压范围可以是 ±750KV以上,例如, 第一特高压直流电的电压是士 1000KV或 ±1200KV。
当第一特高压直流电的电压为 ±1000KV时, 第一低压直流电的 电压范围可以是 300KV-600KV, 可选地, 在对称情况下, 第一低 压直流电的电压为笫一特高压直流电的电压的 1/3, 即, 333.3KV, 在非对称情况下, 第一低压直流电的电压可以为 400KV; 第一中压 直流电的电压范围可以是 600KV~900KV, 可选地, 在对称情况下, 第一中压直流电的电压为第一特高压直流电的电压的 2/3 , 即, 666.6KV, 在非对称情况下, 第一中压直流电的电压可以为 800KV。
举例说明上述叠加过程,如果第一低压直流电的电压为 400KV, 输入整流侧特高压中端换流站的交流电经整流后的电压为 400KV, 则第一中压直流电的电压为 800KV, 第二交流电经整流后的电压为 200KV, 则与第一中压直流电叠加后的第一特高压直流电的电压为 1000KV。
当第一特高压直流电的电压为 ±1200KV时, 在对称情况下, 第 一低压直流电的电压为 400KV, 第一中压直流电的电压为 800KV; 在非对称情况下, 第一低压直流电的电压可以为 500KV, 第一中压 直流电的电压可以为 1000KV。
当采用上述对称的配置方式时, 可以有效地保证电网的输出功 率。
上述第一交流电和第二交流电均可以包括一条或多条交流回 路, 其电压值的大小及确定原则与现有技术相同, 在此不再详细说 明。
其中, 整流侧特高压中端换流站的数量可以是一个或多个。 在整流侧特高压中端换流站为两个以上时, 如图 8所示, 依次 级联两个以上整流侧特高压中端换流站。 在这种情况下, 两个以上 整流侧特高压中端换流站中的每个整流侧特高压中端换流站都可以 接收相应的交流电及输入的直流电, 相应的交流电经整流后与输入 的直流电相叠加, 并输出叠加后的直流电。
需要说明的是, 上述整流侧特高压高端换流站可以包括一个高 端阀厅或两个极性不同的高端阀厅, 整流侧特高压低端换流站可以 包括一个低端阀厅或两个极性不同的低端阀厅, 整流侧特高压中端 换流站可以包括一个中端阀厅或两个极性不同的中端阀厅。
当整流侧特高压高端换流站包括两个极性不同的高端阀厅时, 这两个极性不同的高端阀厅可以位于不同的位置; 此时整流侧特高 压低端换流站中的两个低端阀厅可以处于相同或不同的位置, 整流 侧特高压中端换流站中的两个中端阀厅可以处于相同或不同的位 置。
当整流侧特高压低端换流站包括两个极性不同的低端阀厅时, 这两个极性不同的低端阀厅可以位于不同的位置; 此时整流侧特高 压高端换流站中的两个高端阀厅可以处于相同或不同的位置, 整流 侧特高压中端换流站中的两个中端阀厅可以处于相同或不同的位 置。 当整流侧特高压中端换流站包括两个极性不同的中端阀厅时, 这两个极性不同的中端阀厅可以位于不同的位置; 此时整流侧特高 压高端换流站中的两个高端阀厅可以处于相同或不同的位置, 整流 侧特高压低端换流站中的两个低端阀厅可以处于相同或不同的位 置。
应用上述实施例, 由于将整流侧特高压高端换流站与整流侧特 高压低端换流站分别设置在不同的物理位置, 所以电源端内的第一 电源收集点可以直接为整流侧特高压低端换流站送电, 电源端内的 第二电源收集点可以直接为整流侧特高压高端换流站送电, 不需要 再将第一电源收集点和第二电源收集点进行电源的汇合, 即不再需 要图 2 中的电源汇合装置 205, 因此, 减少了第一电源收集点、 第 二电源收集点与整流侧特高压换流站之间的交流线路的出线回数, 降低了传输成本及传输损耗, 获得了较好的经济效益。 此外, 这种 将整流侧特高压高、 低端换流站分别设置在不同物理位置的方式解 决了高端变压器运输难的问题, 大大减少了建设成本, 降低了运费。
上述整流侧的第二实施例与第一实施例相比, 由于引入了至少 一个整流侧特高压中端换流站, 使得第二实施例的整流侧特高压高 端换流站能够输出比第一实施例更高的第一特高压直流电。 同时, 与第一实施例相比, 第二实施例还可以更方便地收集更多个分散的 交流电电源。
图 9是本发明逆变侧特高压换流站的第一实施例的结构和接线 示意图。
如图 9所示, 该实施例的逆变侧特高压换流站包括:
逆变侧特高压高端换流站 31, 用于通过特高压直流输电线路输 入第一特高压直流电, 输出第三交流电和第二低压直流电, 将第三 交流电输送至第一负荷区域;
逆变侧特高压低端换流站 32, 用于将第二低压直流电转换为第 四交流电并传输至第二负荷区域。 具体地, 逆变侧特高压高端换流站 31可以包括: 第四电源输入模块, 用于接收通过特高压直流输电线路输入的 第一特高压直流电, 并传送给第四电源变换模块;
第四电源变换模块, 用于接收第一特高压直流电, 输出第三交 流电和第二低压直流电, 将第三交流电输送至第一负荷区域, 并将 第二低压直流电传输至逆变侧特高压低端换流站。
逆变侧特高压低端换流站 32可以包括:
第三电源输入模块, 用于接收第二低压直流电, 并传送给第三 电源变换模块;
第三电源变换模块, 用于将第二低压直流电转换为第四交流电, 并传输至第二负荷区域。
图 10是图 9的逆变侧特高压换流站的接线方法的第一实施例的 流程示意图。
如图 10所示, 该实施例可以包括以下步骤:
S302, 设置逆变侧特高压高端换流站和逆变侧特高压低端换流 站, 即, 可以将这两个换流站分別设置在不同的物理位置;
S304, 逆变侧特高压高端换流站通过特高压直流输电线路输入 第一特高压直流电, 输出第三交流电和第二低压直流电, 将第三交 流电输送至第一负荷区域;
S306, 通过逆变侧特高压低端换流站将第二低压直流电转换为 第四交流电并传输至第二负荷区域。
其中, 上述第一负荷区域与第二负荷区域可以是物理上不同的 负荷区域。
其中,第一特高压直流电的电压范围可以是 ±750KV以上,例如, 第一特高压直流电的电压是 ±800KV或 ±1000KV。
当第一特高压直流电的电压为 ±800KV时,第二低压直流电的电 压范围可以是 300KV-660KV, 优选地, 第二低压直流电的电压为 第一特高压直流电的电压的一半, 即, 400KV。 需要说明的是, 上述第三、 四交流电可以包括一条或多条交流 线路, 具体数量可以根据负荷端的数量及要求确定, 其中, 每个负 荷区域可以对应一条或一条以上交流线路, 具体的确定方式为现有 技术, 在此不再详细说明。
需要说明的是, 上述第三、 四交流电中各条交流线路的电压值 可以根据负荷端的具体要求确定, 其确定的过程为现有技术, 在此 不再详细说明。
需要说明的是, 上述逆变侧特高压高端换流站可以包括一个高 端阀厅或两个极性不同的高端阀厅, 也就是说, 既可以由两个高端 岡厅构成一个逆变侧特高压高端换流站, 也可以由一个高端阀厅构 成一个逆变侧特高压高端换流站; 相应的, 上述逆变侧特高压低端 换流站可以包括一个低端阀厅或两个极性不同的低端阀厅。
当逆变侧特高压高端换流站包括两个极性不同的高端阀厅时, 这两个极性不同的高端阀厅可以位于不同的位置。 此时逆变侧特高 压低端换流站中的两个低端阀厅可以处于相同或不同的位置。
当逆变侧特高压低端换流站包括两个极性不同的低端阀厅时, 这两个极性不同的低端阀厅可以位于不同的位置。 此时逆变侧特高 压高端换流站中的两个高端阀厅可以处于相同或不同的位置。
当逆变侧特高压高端换流站的两个高端阀厅处于不同位置, 并 且逆变侧特高压低端换流站的两个低端阀厅处于不同位置时, 如图
11所示。
图 12 是本发明逆变侧特高压换流站的第二实施例的结构和接 线示意图。
如图 12所示, 与逆变侧特高压换流站的第一实施例相比, 该实 施例的逆变侧特高压换流站还包括介于逆变侧特高压高端换流站 31 和逆变侧特高压低端换流站 32之间的逆变侧特高压中端换流站 41, 其中,
逆变侧特高压中端换流站 41, 用于接收逆变侧特高压高端换流 站 31输出的第二中压直流电, 输出交流电和第二低压直流电, 并将 第二低压直流电传送至逆变侧特高压低端换流站 32, 将输出的交流 电送至对应的负荷区域。
具体地, 逆变侧特高压中端换流站 41可以包括:
第六电源输入模块, 用于接收输入的直流电, 并传送至第六电 源变换模块;
第六电源变换模块, 用于接收输入的直流电, 输出交流电和直 流电, 将愉出的交流电送至对应的负荷区域。
图 13是图 12的逆变侧特高压换流站的接线方法的第二实施例 的流程示意图。
如图 13所示, 该实施例可以包括以下步骤:
S402, 分别设置逆变侧特高压高端换流站、 逆变侧特高压低端 换流站和逆变侧特高压中端换流站;
S404, 逆变侧特高压高端换流站通过特高压直流输电线路输入 第一特高压直流电, 输出第三交流电和第二中压直流电;
S406, 将第三交流电输送至第一负荷区域;
S408, 逆变侧特高压中端换流站接收第二中压直流电, 输出交 流电和第二低压直流电, 并将输出的交流电送至对应的负荷区域;
S410, 通过逆变侧特高压低端换流站将第二低压直流电转换为 第四交流电并传输至第二负荷区域。
其中, 上述第一负荷区域、 第二负荷区域和对应的负荷区域可 以是物理上不同的负荷区域。
其中,第一特高压直流电的电压范围可以是 ±750KV以上,例如, 第一特高压直流电的电压为 ±1000KV或 ±1200KV。
当第一特高压直流电的电压为 ±1000KV时, 第二中压直流电的 电压范围可以是 600KV~900KV, 可选地, 在对称情况下, 第二中 压直流电的电压为第一特高压直流电的电压的 2/3, 即, 666.6KV, 在非对称情况下, 第二中压直流电的电压可以为 800KV; 第二低压 直流电的电压范围可以是 300KV~600KV, 可选地, 在对称情况下, 第二低压直流电的电压为第一特高压直流电的电压的 1/3, 即, 333.3KV, 在非对称情况下, 第二低压直流电的电压可以为 400KV。
在非对称情况下, 举例说明上述功率分发过程, 如果第一特高 压直流电的电压为 1000KV,输送到第一负荷区域的电压为 200KV, 则第二中压直流电为 800KV, 如果输送到逆变侧特高压中端换流站 对应的负荷区域的电压为 400KV, 则第二低压直流电为 400KV。
当第一特高压直流电的电压为 ±1200KV时, 在对称情况下, 第 二中压直流电的电压为 800KV, 第二低压直流电的电压为 400KV; 在非对称情况下, 第二中压直流电的电压为 1000KV, 第二低压直 流电的电压为 500KV。
当采用上述对称的配置方式时, 可以有效地保证电网的输出功 率。
逆变侧特高压中端换流站的数量可以是一个或多个。 在逆变侧 特高压中端换流站为两个以上时, 如图 14所示,依次级联两个以上 逆变侧特高压中端换流站, 两个以上逆变侧特高压中端换流站中的 每个逆变侧特高压中端换流站接收输入的直流电, 输出相应的交流 电和直流电。
需要说明的是, 上述逆变侧特高压高端换流站可以包括一个高 端阀厅或两个极性不同的高端阀厅, 逆变侧特高压低端换流站可以 包括一个低端阀厅或两个极性不同的低端阀厅, 逆变侧特高压中端 换流站可以包括一个中端阀厅或两个极性不同的中端阀厅。
当逆变侧特高压高端换流站包括两个极性不同的高端阀厅时, 这两个极性不同的高端阀厅可以位于不同的位置; 此时逆变侧特高 压低端换流站中的两个低端阀厅可以处于相同或不同的位置, 逆变 侧特高压中端换流站中的两个中端阀厅可以处于相同或不同的位 置。
当逆变侧特高压低端换流站包括两个极性不同的低端阀厅时, 这两个极性不同的低端阀厅可以位于不同的位置; 此时逆变侧特高 压高端换流站中的两个高端阀厅可以处于相同或不同的位置, 逆变 侧特高压中端换流站中的两个中端阀厅可以处于相同或不同的位 置。
当逆变侧特高压中端换流站包括两个极性不同的中端阀厅时, 这两个极性不同的中端阀厅可以位于不同的位置; 此时逆变侧特高 压高端换流站中的两个高端阀厅可以处于相同或不同的位置, 逆变 侧特高压低端换流站中的两个低端阀厅可以处于相同或不同的位 置。
应用上述实施例, 由于可以将逆变侧特高压高端换流站与逆变 侧特高压低端换流站分别设置在不同的物理位置, 因而逆变侧特高 压低端换流站可以深入到负荷端以缩短换流站与负荷端之间的距 离,从而降低了逆变侧特高压换流站与负荷之间的传输成本及损耗, 而且, 由于逆变侧特高压低端换流站和逆变侧特高压高端换流站的 分开建设(即, 可以不在同一物理位置), 因而^ L了负荷的分布, 方便了对用户的供电。
上述逆变侧的第二实施例与第一实施例相比, 由于引入了至少 一个逆变侧特高压中端换流站, 使得第二实施例的逆变侧能够更方 便地向多个负荷区域供电, 同时, 也使能够使电网的安全稳定性更 好。
需要说明的是, 图 3至图 8所述实施例是针对整流侧的改进, 图 9至图 14所述实施例是针对逆变侧的改进,两者只要应用其一就 可以达到降低传输成本及传输损耗的目的, 如果二者同时应用, 所 产生的有益效果将更加突出。 在本发明实施例中, 并不限定二者是 分别单独应用还是同时被应用。
图 15 是本发明特高压直流输电系统的第一实施例的结构和接 线示意图。
如图 15所示, 该实施例的特高压直流输电系统包括图 3实施例 所示的整流侧特高压换流站 51 (具体包括相互连接的整流侧特高压 低端换流站 11和整流侧特高压高端换流站 12 )和图 9实施例所示 的逆变侧特高压换流站 52 (具体包括相互连接的逆变侧特高压高端 换流站 31和逆变侧特高压低端换流站 32 )。 其中, 整流侧特高压换 流站中的整流侧特高压高端换流站与逆变侧特高压换流站中的逆变 侧特高压高端换流站通过特高压直流输电线路相连。
图 16是图 15的特高压直流输电系统的接线方法的第一实施例 的流程示意图。
如图 16所示, 该实施例包括以下步骤:
S502, 分别设置整流侧特高压高端换流站和整流侧特高压低端 换流站, 即, 可以将这两者分别设置在不同的物理位置以尽量减少 送入整流侧特高压换流站的交流接线回数;
S504, 分别设置逆变侧特高压高端换流站和逆变侧特高压低端 换流站, 即, 可以将这两者分别设置在不同的物理位置以方便向负 荷端提供电能;
S506, 整流侧特高压低端换流站接收来自第一电源收集点的第 一交流电, 将第一交流电转换为第一低压直流电, 并输入到整流侧 特高压高端换流站;
S508, 整流侧特高压高端换流站接收来自第二电源收集点的第 二交流电及第一低压直流电, 将第二交流电整流后与第一低压直流 电叠加, 产生第一特高压直流电, 并通过特高压直流输电线路输出 第一特高压直流电;
S510, 逆变侧特高压高端换流站通过特高压直流输电线路输入 第一特高压直流电, 输出第三交流电和第二低压直流电;
S512, 将第三交流电输送至第一负荷区域;
S514, 通过逆变侧特高压低端换流站将第二低压直流电转换为 第四交流电并传输至第二负荷区域。
其中, 上述第一负荷区域与第二负荷区域可以是物理上不同的 负荷区域。
第一特高压直流电的电压范围可以是 ±750KV以上,例如,第一 特高压直流电的电压是 ±800KV或 ±1000KV。
当第一特高压直流电的电压为 ±800KV时,第一低压直流电的电 压范围可以是 300KV-660KV, 优选地, 第一低压直流电的电压为 第一特高压直流电的电压的一半, 即, 400KV; 第二低压直流电的 电压范围可以是 300KV-660KV, 优选地, 第二低压直流电的电压 为第一特高压直流电的电压的一半, 即, 400KV。
上述第一交流电和第二交流电均可以包括一条或多条交流回 路, 其电压值大小及确定原则与现有技术相同, 在此不再详细说明。 上述第三、 四交流电也可以包括一条或多条交流线路, 具体数量可 以根据负荷端的数量及要求确定, 其中, 每个负荷区域可以对应一 条或一条以上交流线路, 具体的确定方式为现有技术, 在此不再详 细说明。 另外, 上述第三、 四交流电中各条交流线路的电压值可以 根据负荷端的具体要求确定, 其确定的过程为现有技术, 在此不再 详细说明。
需要说明的是, 上述整流侧特高压高端换流站可以包括一个高 端阀厅或两个极性不同的高端阀厅; 相应地, 上述整流侧特高压低 端换流站可以包括一个低端阀厅或两个极性不同的低端阀厅。
当整流侧特高压高端换流站包括两个极性不同的高端阀厅时, 这两个极性不同的高端阀厅可以位于不同的位置; 此时整流侧特高 压低端换流站中的两个低端阀厅可以处于相同或不同的位置。
当整流侧特高压低端换流站包括两个极性不同的低端阀厅时, 这两个极性不同的低端阀厅可以位于不同的位置; 此时整流侧特高 压高端换流站中的两个高端阀厅可以处于相同或不同的位置。
另外, 上述逆变侧特高压高端换流站可以包括一个高端阀厅或 两个极性不同的高端阀厅, 也就是说, 既可以由两个高端阀厅构成 一个逆变侧特高压高端换流站, 也可以由一个高端阀厅构成一个逆 变侧特高压高端换流站; 相应的, 上述逆变侧特高压低端换流站可 以包括一个低端阀厅或两个极性不同的低端阀厅。
当逆变侧特高压高端换流站包括两个极性不同的高端阀厅时, 这两个极性不同的高端阀厅可以位于不同的位置; 此时逆变侧特高 压低端换流站中的两个低端阀厅可以处于相同或不同的位置。
当逆变侧特高压低端换流站包括两个极性不同的低端岡厅时, 这两个极性不同的低端阀厅可以位于不同的位置; 此时逆变侧特高 压高端换流站中的两个高端阀厅可以处于相同或不同的位置。
在整流侧特高压低端换流站包括两个极性不同的低端阀厅、 整 流侧特高压高端换流站包括两个极性不同的高端阀厅、 逆变侧特高 压高端换流站包括两个极性不同的高端阀厅以及逆变侧特高压低端 换流站包括两个极性不同的低端阀厅时, 如图 17所示。
图 18是本发明特高压直流输电系统的第二实施例的结构和接 线示意图。
如图 18所示, 与特高压直流输电系统的第一实施例相比, 该实 施例的特高压直流输电系统还包括介于整流侧特高压低端换流站 11 与整流侧特高压高端换流站 12之间的整流侧特高压中端换流站 21, 以及介于逆变侧特高压高端换流站 31 和逆变侧特高压低端换流站 32之间的逆变侧特高压中端换流站 41。
图 19是图 18的特高压直流输电系统的接线方法的第二实施例 的流程示意图。
如图 19所示, 该实施例包括以下步骤:
S602, 分别设置整流侧特高压高端换流站、 整流侧特高压低端 换流站和整流侧特高压中端换流站;
S604, 分别设置逆变侧特高压高端换流站、 逆变侧特高压低端 换流站和逆变侧特高压中端换流站;
S606, 整流侧特高压低端换流站接收来自第一电源收集点的第 一交流电, 将第一交流电转换为第一低压直流电, 并输入到整流侧 特高压中端换流站;
S608,整流侧特高压中端换流站接收交流电及第一低压直流电, 交流电经整流后与第一低压直流电叠加, 产生第一中压直流电, 并 将第一中压直流电输入到整流侧特高压高端换流站;
S610, 整流侧特高压高端换流站接收来自第二电源收集点的第 二交流电及第一中压直流电, 将第二交流电整流后与第一中压直流 电叠加, 产生第一特高压直流电, 并通过特高压直流输电线路输出 第一特高压直流电;
S612, 逆变侧特高压高端换流站通过特高压直流输电线路输入 第一特高压直流电, 输出第三交流电和第二中压直流电;
S614, 将第三交流电输送至第一负荷区域;
S616, 逆变侧特高压中端换流站接收第二中压直流电, 输出交 流电和第二低压直流电, 并将输出的交流电送至对应的负荷区域;
S618, 通过逆变侧特高压低端换流站将第二低压直流电转换为 第四交流电并传输至第二负荷区域。
其中, 上述第一负荷区域、 第二负荷区域和对应的负荷区域可 以是物理上不同的负荷区域。
整流侧特高压中端换流站的数量可以是一个或多个。 在整流侧 特高压中端换流站为两个以上时, 依次级联两个以上整流侧特高压 中端换流站, 两个以上整流侧特高压中端换流站中的每个整流侧特 高压中端换流站接收相应的交流电及输入的直流电, 相应的交流电 经整流后与输入的直流电相叠加, 并输出叠加后的直流电。
可选地, 逆变侧特高压中端换流站的数量可以是一个或多个。 在逆变侧特高压中端换流站为两个以上时, 依次级联两个以上逆变 侧特高压中端换流站, 两个以上逆变侧特高压中端换流站中的每个 逆变侧特高压中端换流站接收输入的直流电, 输出相应的交流电和 直流电。
在整流侧特高压中端换流站为两个以上, 并且逆变侧特高压中 端换流站为两个以上时, 如图 20所示。
其中,第一特高压直流电的电压范围可以是 ±750KV以上,例如, 第一特高压直流电的电压是 ±1000KV或 ±1200KV。
当第一特高压直流电的电压为 ±1000KV时, 第一低压直流电的 电压范围可以是 300KV~600KV, 可选地, 在对称情况下, 第一低 压直流电的电压为第一特高压直流电的电压的 1/3, 即, 333.3KV, 在非对称情况下, 第一低压直流电的电压可以为 400KV。 第一中压 直流电的电压范围可以是 600KV~900KV, 可选地, 在对称情况下, 第一中压直流电的电压为第一特高压直流电的电压的 2/3 , 即, 666.6KV, 在非对称情况下, 第一中压直流电的电压可以为 800KV。 第二中压直流电的电压范围可以是 600KV〜900KV, 可选地, 在对 称情况下, 第二中压直流电的电压为第一特高压直流电的电压的 2/3, 即, 666.6KV, 在非对称情况下, 第二中压直流电的电压可以 为 800KV; 第二低压直流电的电压范围可以是 300KV~600KV, 可 选地, 在对称情况下, 第二低压直流电的电压为第一特高压直流电 的电压的 1/3, 即, 333.3KV, 在非对称情况下, 第二低压直流电的 电压可以为 400KV。
当第一特高压直流电的电压为 ±1200KV时, 在对称情况下, 第 一低压直流电的电压为 400KV, 第一中压直流电的电压为 800KV; 在非对称情况下, 第一低压直流电的电压为 500KV, 第一中压直流 电的电压为 1000KV, 在对称情况下, 第二中压直流电的电压为 800KV, 第二低压直流电的电压为 400KV; 在非对称情况下, 第二 中压直流电的电压为 1000KV, 第二低压直流电的电压为 500KV。
当采用上述对称的配置方式时, 可以有效地保证电网的输出功 率。
需要说明的是, 上述整流侧特高压高端换流站可以包括一个高 端阀厅或两个极性不同的高端阀厅, 整流侧特高压低端换流站可以 包括一个低端阀厅或两个极性不同的低端阀厅, 整流侧特高压中端 换流站可以包括一个中端阀厅或两个极性不同的中端阀厅。
当整流侧特高压高端换流站包括两个极性不同的高端阀厅时, 这两个极性不同的高端阀厅可以位于不同的位置; 此时整流侧特高 压低端换流站中的两个低端阀厅可以处于相同或不同的位置, 整流 侧特高压中端换流站中的两个中端阀厅可以处于相同或不同的位 当整流侧特高压低端换流站包括两个极性不同的低端阀厅时, 这两个极性不同的低端阀厅可以位于不同的位置; 此时整流侧特高 压高端换流站中的两个高端阀厅可以处于相同或不同的位置, 整流 侧特高压中端换流站中的两个中端岡厅可以处于相同或不同的位 置。
当整流侧特高压中端换流站包括两个极性不同的中端阀厅时, 这两个极性不同的中端阀厅可以位于不同的位置; 此时整流侧特高 压高端换流站中的两个高端阀厅可以处于相同或不同的位置, 整流 侧特高压低端换流站中的两个低端阀厅可以处于相同或不同的位 置。
需要说明的是, 上述逆变侧特高压高端换流站可以包括一个高 端阀厅或两个极性不同的高端阀厅, 逆变侧特高压低端换流站可以 包括一个低端阀厅或两个极性不同的低端阀厅, 逆变侧特高压中端 换流站可以包括一个中端阀厅或两个极性不同的中端阀厅。
当逆变侧特高压高端换流站包括两个极性不同的高端阀厅时, 这两个极性不同的高端阀厅可以位于不同的位置; 此时逆变侧特高 压低端换流站中的两个低端阀厅可以处于相同或不同的位置, 逆变 侧特高压中端换流站中的两个中端阀厅可以处于相同或不同的位 置。
当逆变侧特高压低端换流站包括两个极性不同的低端阀厅时, 这两个极性不同的低端阀厅可以位于不同的位置; 此时逆变侧特高 压高端换流站中的两个高端阀厅可以处于相同或不同的位置, 逆变 侧特高压中端换流站中的两个中端阀厅可以处于相同或不同的位 置。
当逆变侧特高压中端换流站包括两个极性不同的中端阀厅时, 这两个极性不同的中端阀厅可以位于不同的位置; 此时逆变侧特高 压高端换流站中的两个高端阀厅可以处于相同或不同的位置, 逆变 侧特高压低端换流站中的两个低端阀厅可以处于相同或不同的位 置。
该实施例由于将整流侧特高压高端换流站与整流侧特高压低端 换流站分别设置在不同的物理位置, 所以在整流侧不需要再将第一 电源收集点和第二电源收集点进行电源的汇合, 减少了送入整流侧 特高压换流站的交流接线回数, 降低了传输成本及传输损耗, 获得 了较好的经济效益。 而且由于将逆变侧特高压高端换流站与逆变侧 特高压低端换流站分别设置在不同的物理位置, 所以在逆变侧可以 将电能直接投射到多个负荷中心, 在减少了由于负荷区域之间传输 电能所引起的功率折返和功率损耗的同时还能够更方便地向负荷端 提供电能。
上述特高压直流输电系统的第二实施例与第一实施例相比, 由 于引入了至少一个整流侧特高压中端换流站, 使得第二实施例的整 流侧特高压高端换流站能够输出比第一实施例更高的第一特高压直 流电。 同时, 第二实施例相比第一实施例还可以方便地收集更多个 分散的交流电电源。 另外, 由于引入了至少一个逆变侧特高压中端 换流站, 使得第二实施例的逆变侧能够更方便地向多个负荷区域供 电, 同时, 也使能够使电网的安全稳定性更好。
需要说明的是, 在本文中, 诸如第一和第二等之类的关系术语 仅仅用来将一个实体或者操作与另一个实体或操作区分开来, 而不 一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或 者顺序。 而且, 术语"包括"、 "包含 "或者其任何其他变体意在涵盖 非排他性的包含, 从而使得包括一系列要素的过程、 方法、 物品或 者设备不仅包括那些要素, 而且还包括没有明确列出的其他要素, 或者是还包括为这种过程、 方法、 物品或者设备所固有的要素。 在 没有更多限制的情况下, 由语句 "包括一个 ...... "限定的要素, 并不 排除在包括所述要素的过程、 方法、 物品或者设备中还存在另外的 相同要素。
以上所述仅为本发明的较佳实施例而已,并非用于限定本发明的 保护范围。 凡在本发明的精神和原则之内所作的任何修改、 等同替 换、 改进等, 均包含在本发明的保护范围内。

Claims

1. 一种用于整流侧特高压直流输电的接线方法, 其特征在于, 所述方法包括:
分别设置整流侧特高压高端换流站和整流侧特高压低端换流站; 所述整流侧特高压低端换流站接收来自第一电源收集点的第一交流 电, 将所述第一交流电转换为第一低压直流电, 并输入到所述整流 侧特高压高端换流站;
所述整流侧特高压高端换流站接收来自笫二电源收集点的第二交流 电及所述第一低压直流电, 将所述第二交流电整流后与所述第一低 压直流电叠加, 产生第一特高压直流电, 并通过特高压直流输电线 路输出所述第一特高压直流电。
2. 根据权利要求 1所述的方法, 其特征在于,
所述整流侧特高压高端换流站包括两个极性不同的高端阀厅; 所述整流侧特高压低端换流站包括两个极性不同的低端阀厅。
3. 根据权利要求 2所述的方法, 其特征在于,
所述两个极性不同的高端阀厅位于不同的位置和 /或所述两个极性 不同的低端阀厅位于不同的位置。
4. 一种用于逆变侧特高压直流输电的接线方法, 其特征在于, 所述方法包括:
分别设置逆变侧特高压高端换流站和逆变侧特高压低端换流站; 所述逆变侧特高压高端换流站通过特高压直流输电线路输入第一特 高压直流电, 输出第三交流电和第二低压直流电;
将所述第三交流电输送至第一负荷区域;
通过所述逆变侧特高压低端换流站将所述第二低压直流电转换为第 四交流电并传输至第二负荷区域。
5. 根据权利要求 4所述的方法, 其特征在于,
所述逆变侧特高压高端换流站包括两个极性不同的高端阀厅; 所述逆变侧特高压低端换流站包括两个极性不同的低端阀厅。
6. 根据权利要求 5所述的方法, 其特征在于,
所述两个极性不同的高端阀厅位于不同的位置和 /或所述两个极性 不同的低端阀厅位于不同的位置。
7. 一种用于特高压直流输电的接线方法, 其特征在于, 所述方 法包括:
分别设置整流侧特高压高端换流站和整流侧特高压低端换流站; 分别设置逆变侧特高压高端换流站和逆变侧特高压低端换流站; 所述整流侧特高压低端换流站接收来自第一电源收集点的第一交流 电, 将所述第一交流电转换为第一低压直流电, 并输入到所述整流 侧特高压高端换流站;
所述整流侧特高压高端换流站接收来自第二电源收集点的第二交流 电及所述第一低压直流电, 将所述第二交流电整流后与所述第一低 压直流电叠加, 产生第一特高压直流电, 并通过特高压直流输电线 路输出所述第一特高压直流电;
所述逆变侧特高压高端换流站通过特高压直流输电线路输入第一特 高压直流电, 输出第三交流电和笫二低压直流电;
将所述第三交流电输送至第一负荷区域;
通过所述逆变侧特高压低端换流站将所述第二低压直流电转换为第 四交流电并传输至第二负荷区域。
8. 根据权利要求 7所述的方法, 其特征在于,
所述整流侧特高压高端换流站包括两个极性不同的高端阀厅; 所述整流侧特高压低端换流站包括两个极性不同的低端阀厅。
9. 根据权利要求 8所述的方法, 其特征在于,
所述两个极性不同的高端阀厅位于不同的位置和 /或所述两个极性 不同的低端阀厅位于不同的位置。
10. 根据权利要求 7-9中任一项所述的方法, 其特征在于, 所述逆变侧特高压高端换流站包括两个极性不同的高端阀厅; 所述逆变侧特高压低端换流站包括两个极性不同的低端阀厅。
11. 根据权利要求 10所述的方法, 其特征在于, 所述逆变侧特高压高端换流站的两个极性不同的高端阀厅位于不同 的位置和 /或所述逆变侧特高压低端换流站的两个极性不同的低端 阀厅位于不同的位置。
12. 一种用于整流侧特高压直流输电的接线方法, 其特征在于, 所述方法包括:
分别设置整流侧特高压高端换流站. 整流侧特高压低端换流站 和整流侧特高压中端换流站;
所述整流侧特高压低端换流站接收来自第一电源收集点的第一交流 电, 将所述第一交流电转换为第一低压直流电, 并输入到所述整流 侧特高压中端换流站;
所述整流侧特高压中端换流站接收交流电及所述第一低压直流电, 所述交流电经整流后与所述第一低压直流电叠加, 产生第一中压直 流电, 并将所述第一中压直流电输入到所述整流侧特高压高端换流 站;
所述整流侧特高压高端换流站接收来自第二电源收集点的第二交流 电及所述第一中压直流电, 将所述第二交流电整流后与所述第一中 压直流电叠加, 产生第一特高压直流电, 并通过特高压直流输电线 路输出所述第一特高压直流电。
13. 根据权利要求 12 所述的方法, 其特征在于, 所述整流侧特 高压中端换流站的数量是一个或多个。
14. 根据权利要求 13 所述的方法, 其特征在于, 在所述整流侧 特高压中端换流站为两个以上时, 依次级联所述两个以上整流侧特 高压中端换流站, 所述方法还包括:
每个整流侧特高压中端换流站接收相应的交流电及输入的直流电, 所述相应的交流电经整流后与所述输入的直流电相叠加, 并输出叠 加后的直流电。
15. 根据权利要求 12所述的方法, 其特征在于,
所述整流侧特高压高端换流站包括两个极性不同的高端阀厅; 所述整流侧特高压中端换流站包括两个极性不同的中端阀厅; 所述整流侧特高压低端换流站包括两个极性不同的低端阀厅。
16. 根据权利要求 15所述的方法, 其特征在于,
所述两个极性不同的高端阀厅位于不同的位置和 /或所述两个极性 不同的中端阀厅位于不同的位置和 /或所述两个极性不同的低端阀 厅位于不同的位置。
17. 一种用于逆变侧特高压直流输电的接线方法, 其特征在于, 所述方法包括:
分别设置逆变侧特高压高端换流站. 逆变侧特高压低端换流站 和逆变侧特高压中端换流站;
所述逆变侧特高压高端换流站通过特高压直流输电线路输入第一特 高压直流电, 输出第三交流电和第二中压直流电;
将所述第三交流电输送至第一负荷区域;
所述逆变侧特高压中端换流站接收所述第二中压直流电, 输出交流 电和第二低压直流电, 并将输出的交流电送至对应的负荷区域; 通过所述逆变侧特高压低端换流站将所述第二低压直流电转换为第 四交流电并传输至第二负荷区域。
18. 根据权利要求 17所述的方法, 其特征在于, 所述逆变侧特 高压中端换流站的数量是一个或多个。
19. 根据权利要求 18所述的方法, 其特征在于, 在所述逆变侧 特高压中端换流站为两个以上时, 依次级联所述两个以上逆变侧特 高压中端换流站, 所述方法还包括:
每个逆变侧特高压中端换流站接收输入的直流电, 输出相应的交流 电和直流电, 并将所 目应的交流电送至对应的负荷区域。
20. 根据权利要求 17所述的方法, 其特征在于,
所述逆变侧特高压高端换流站包括两个极性不同的高端阀厅; 所述逆变侧特高压中端换流站包括两个极性不同的中端阀厅; 所述逆变侧特高压低端换流站包括两个极性不同的低端阀厅。
21. 根据权利要求 20所述的方法, 其特征在于,
所述两个极性不同的高端阀厅位于不同的位置和 /或所述两个极性 不同的中端阀厅位于不同的位置和 /或所述两个极性不同的低端阀 厅位于不同的位置。
22. 一种用于特高压直流输电的接线方法, 其特征在于, 所述方 法包括:
分别设置整流侧特高压高端换流站. 整流侧特高压低端换流站 和整流侧特高压中端换流站;
分别设置逆变侧特高压高端换流站. 逆变侧特高压低端换流站 和逆变侧特高压中端换流站;
所述整流侧特高压低端换流站接收来自第一电源收集点的第一交流 电, 将所述第一交流电转换为第一低压直流电, 并输入到所述整流 侧特高压中端换流站;
所述整流侧特高压中端换流站接收交流电及所述第一低压直流电, 所述交流电经整流后与所述第一低压直流电叠加, 产生第一中压直 流电, 并将所述第一中压直流电输入到所述整流侧特高压高端换流 站;
所述整流侧特高压高端换流站接收来自第二电源收集点的第二交流 电及所述第一中压直流电, 将所述第二交流电整流后与所述第一中 压直流电叠加, 产生第一特高压直流电, 并通过特高压直流输电线 路输出所述第一特高压直流电;
所述逆变侧特高压高端换流站通过特高压直流输电线路输入第一特 高压直流电, 输出第三交流电和第二中压直流电;
将所述第三交流电输送至第一负荷区域;
所述逆变侧特高压中端换流站接收所述第二中压直流电, 输出交流 电和第二低压直流电, 并将输出的交流电送至对应的负荷区域; 通过所述逆变侧特高压低端换流站将所述第二低压直流电转换为第 四交流电并传输至第二负荷区域。
23. 根据权利要求 22 所述的方法, 其特征在于, 所述整流侧特 高压中端换流站的数量是一个或多个。
24. 根据权利要求 23 所述的方法, 其特征在于, 在所述整流侧 特高压中端换流站为两个以上时, 依次级联所述两个以上整流侧特 高压中端换流站, 所述方法还包括:
每个整流侧特高压中端换流站接收相应的交流电及输入的直流电, 所述相应的交流电经整流后与所述输入的直流电相叠加, 并输出叠 加后的直流电。
25. 根据权利要求 22或 23所述的方法, 其特征在于, 所述逆变 侧特高压中端换流站的数量是一个或多个。
26. 根据权利要求 25所述的方法, 其特征在于, 在所述逆变侧 特高压中端换流站为两个以上时, 依次级联所述两个以上逆变侧特 高压中端换流站, 所述方法还包括:
每个逆变侧特高压中端换流站接收输入的直流电, 输出相应的交流 电和直流电, 并将所 ^目应的交流电送至对应的负荷区域。
27. 根据权利要求 22所述的方法, 其特征在于,
所述整流侧特高压高端换流站包括两个极性不同的高端阀厅; 所述整流侧特高压中端换流站包括两个极性不同的中端阀厅; 所述整流侧特高压低端换流站包括两个极性不同的低端阀厅。
28. 根据权利要求 27所述的方法, 其特征在于,
所述两个极性不同的高端阀厅位于不同的位置和 /或所述两个极性 不同的中端阀厅位于不同的位置和 /或所述两个极性不同的低端阀 厅位于不同的位置。
29. 根据权利要求 22. 27和 28中任一项所述的方法,其特征 在于,
所述逆变侧特高压高端换流站包括两个极性不同的高端阀厅; 所述逆变侧特高压中端换流站包括两个极性不同的中端阀厅; 所述逆变侧特高压低端换流站包括两个极性不同的低端阀厅。
30. 根据权利要求 29所述的方法, 其特征在于,
所述逆变侧特高压高端换流站的两个极性不同的高端阀厅位于不同 的位置和 /或所述逆变侧特高压中端换流站的两个极性不同的中端 阀厅位于不同的位置和 /或所述逆变侧特高压低端换流站的两个极 性不同的低端阀厅位于不同的位置。
31. 一种整流侧特高压换流站, 其特征在于, 包括:
整流侧特高压低端换流站, 用于接收来自第一电源收集点的第一交 流电, 将所述第一交流电转换为第一低压直流电, 并输入到整流侧 特高压高端换流站;
所述整流侧特高压高端换流站, 用于接收来自第二电源收集点的第 二交流电及所述第一低压直流电, 将所述第二交流电整流后与所述 第一低压直流电叠加, 产生第一特高压直流电, 并通过特高压直流 输电线路输出所述第一特高压直流电。
32. 根据权利要求 31所述的整流侧特高压换流站, 其特征在于, 所述整流侧特高压低端换流站包括:
第一电源输入模块, 用于接收来自第一电源收集点的第一交流电, 将所述第一交流电传送至第一电源变换模块;
所述第一电源变换模块, 用于将所述第一交流电转换为第一低压直 流电, 并输出到所述整流侧特高压高端换流站。
33. 根据权利要求 31所述的整流侧特高压换流站, 其特征在于, 所述整流侧特高压高端换流站包括:
第二电源输入模块, 用于接收来自第二电源收集点的第二交流电并 传送至第二电源变换模块;
所述第二电源变换模块, 用于将所述第二交流电整流后与所述第一 低压直流电叠加, 产生第一特高压直流电, 并通过特高压直流输电 线路输出所述第一特高压直流电。
34. 根据权利要求 31所述的整流侧特高压换流站, 其特征在于, 所述整流侧特高压高端换流站包括两个极性不同的高端阀厅; 所述整流侧特高压低端换流站包括两个极性不同的低端阀厅。
35. 根据权利要求 34所述的整流侧特高压换流站, 其特征在于, 所述两个极性不同的高端阀厅位于不同的位置和 /或所述两个极性 不同的低端阀厅位于不同的位置。
36. 一种逆变侧特高压换流站, 其特征在于, 包括: 逆变侧特高压高端换流站, 用于通过特高压直流输电线路输入第一 特高压直流电, 输出第三交流电和第二低压直流电, 并将所述第三 交流电输送至第一负荷区域;
逆变侧特高压低端换流站, 用于将所述第二低压直流电转换为第四 交流电并传输至第二负荷区域。
37. 根据权利要求 36所述的逆变侧特高压换流站, 其特征在于, 所述逆变侧特高压高端换流站包括:
第四电源输入模块, 用于接收通过特高压直流输电线路输入的第一 特高压直流电, 并传送给第四电源变换模块;
所述第四电源变换模块, 用于接收所述第一特高压直流电, 输出第 三交流电和第二低压直流电, 将所述第三交流电输送至第一负荷区 域,并将所述第二低压直流电传输至所述逆变侧特高压低端换流站。
38. 根据权利要求 36所述的逆变侧特高压换流站, 其特征在于, 所述逆变侧特高压低端换流站包括:
第三电源输入模块, 用于接收所述第二低压直流电, 并传送给第三 电源变换模块;
所述第三电源变换模块, 用于将所述第二低压直流电转换为第四交 流电, 并传输至第二负荷区域。
39. 根据权利要求 36所述的逆变侧特高压换流站, 其特征在于, 所述逆变侧特高压高端换流站包括两个极性不同的高端阀厅; 所述逆变侧特高压低端换流站包括两个极性不同的低端阀厅。
40. 根据权利要求 39所述的逆变侧特高压换流站, 其特征在于, 所述两个极性不同的高端阀厅位于不同的位置和 /或所述两个极性 不同的低端阀厅位于不同的位置。
41. 一种特高压直流输电系统, 其特征在于, 所述系统包括权利 要求 31所述的整流侧特高压换流站和权利要求 36所述的逆变侧特 高压换流站, 其中, 所述整流侧特高压换流站中的整流侧特高压高 端换流站与所述逆变侧特高压换流站中的逆变侧特高压高端换流站 通过所述特高压直流输电线路相连。
42. 根据权利要求 41所述的特高压直流输电系统, 其特征在于, 所述整流侧特高压高端换流站包括两个极性不同的高端阀厅; 所述整流侧特高压低端换流站包括两个极性不同的低端阀厅。
43. 根据权利要求 42所述的特高压直流输电系统, 其特征在于, 所述两个极性不同的高端阀厅位于不同的位置和 /或所述两个极性 不同的低端阀厅位于不同的位置。
44. 根据权利要求 41-43中任一项所述的特高压直流输电系统, 其特征在于,
所述逆变侧特高压高端换流站包括两个极性不同的高端阀厅; 所述逆变侧特高压低端换流站包括两个极性不同的低端阀厅。
45. 根据权利要求 44所述的特高压直流输电系统, 其特征在于, 所述逆变侧特高压高端换流站的两个极性不同的高端阀厅位于不同 的位置和 /或所述逆变侧特高压低端换流站的两个极性不同的低端 阀厅位于不同的位置。
46. 一种整流侧特高压换流站, 其特征在于, 包括:
整流侧特高压低端换流站, 用于接收来自第一电源收集点的第一交 流电, 将所述第一交流电转换为第一低压直流电, 并输入到整流侧 特高压中端换流站;
所述整流侧特高压中端换流站, 用于接收交流电及所述第一低压直 流电, 所述交流电经整流后与所述第一低压直流电叠加, 产生第一 中压直流电, 并将所述第一中压直流电输入到整流侧特高压高端换 流站;
所述整流侧特高压高端换流站, 用于接收来自第二电源收集点的第 二交流电及所述第一中压直流电, 将所述第二交流电整流后与所述 第一中压直流电叠加, 产生第一特高压直流电, 并通过特高压直流 输电线路输出所述第一特高压直流电。
47. 根据权利要求 46所述的整流侧特高压换流站, 其特征在于, 所述整流侧特高压低端换流站包括:
第一电源输入模块, 用于接收来自第一电源收集点的第一交流电, 将所述第一交流电传送至第一电源变换模块;
所述第一电源变换模块, 用于将所述第一交流电转换为第一低压直 流电, 并输出到与所述整流侧特高压低端换流站相连的整流侧特高 压中端换流站。
48. 根据权利要求 46所述的整流侧特高压换流站, 其特征在于, 所述整流侧特高压中端换流站的数量是一个或多个。
49. 根据权利要求 48所述的整流侧特高压换流站, 其特征在于, 在所述整流侧特高压中端换流站为两个以上时, 依次级联所述两个 以上整流侧特高压中端换流站。
50. 根据权利要求 46所述的整流侧特高压换流站, 其特征在于, 所述整流侧特高压中端换流站包括:
第五电源输入模块, 用于接收来自相应电源收集点的交流电, 并传 送至第五电源变换模块;
所述第五电源变换模块, 用于将所述交流电整流后与输入的直流电 叠加, 并输出叠加后的直流电。
51. 根据权利要求 46所述的整流侧特高压换流站, 其特征在于, 所述整流侧特高压高端换流站包括:
第二电源输入模块, 用于接收来自第二电源收集点的第二交流电并 传送至第二电源变换模块;
所述第二电源变换模块, 用于将所述第二交流电整流后与输入的直 流电叠加, 产生第一特高压直流电, 并通过特高压直流输电线路输 出所述第一特高压直流电。
52. 根据权利要求 46所述的整流侧特高压换流站, 其特征在于, 所述整流侧特高压高端换流站包括两个极性不同的高端阀厅; 所述整流侧特高压中端换流站包括两个极性不同的中端阀厅; 所述整流侧特高压低端换流站包括两个极性不同的低端阀厅。
53. 根据权利要求 52所述的整流侧特高压换流站, 其特征在于, 所述两个极性不同的高端阀厅位于不同的位置和 /或所述两个极性 不同的中端阀厅位于不同的位置和 /或所述两个极性不同的低端阀 厅位于不同的位置。
54. 一种逆变侧特高压换流站, 其特征在于, 包括:
逆变侧特高压高端换流站, 用于通过特高压直流输电线路输入第一 特高压直流电, 输出第三交流电和第二中压直流电, 并将所述第三 交流电输送至第一负荷区域, 将所述第二中压直流电输入到逆变侧 特高压中端换流站;
所述逆变侧特高压中端换流站, 用于接收所述第二中压直流电, 输 出交流电和第二低压直流电, 并将输出的交流电送至对应的负荷区 域;
逆变侧特高压低端换流站, 用于接收所述第二低压直流电, 并转换 为第四交流电传输至第二负荷区域。
55. 根据权利要求 54所述的逆变侧特高压换流站, 其特征在于, 所述逆变侧特高压高端换流站包括:
第四电源输入模块, 用于接收通过特高压直流输电线路输入的第一 特高压直流电, 并传送给第四电源变换模块;
所述第四电源变换模块, 用于接收所述第一特高压直流电, 输出第 三交流电和第二中压直流电, 将所述第三交流电输送至第一负荷区 域, 并将所述第二中压直流电传输至与所述逆变侧特高压高端换流 站相连的逆变侧特高压中端换流站。
56. 根据权利要求 54所述的逆变侧特高压换流站, 其特征在于, 所述逆变侧特高压中端换流站的数量是一个或多个。
57. 根据权利要求 56所述的逆变侧特高压换流站, 其特征在于, 在所述逆变侧特高压中端换流站为两个以上时, 依次级联所述两个 以上逆变侧特高压中端换流站。
58. 根据权利要求 54所述的逆变侧特高压换流站, 其特征在于, 所述逆变侧特高压中端换流站包括:
第六电源输入模块, 用于接收输入的直流电, 并传送至第六电源变 换模块;
所述第六电源变换模块, 用于接收所述输入的直流电, 并输出交流 电和直流电, 并将输出的交流电送至对应的负荷区域。
59. 根据权利要求 54所述的逆变侧特高压换流站, 其特征在于, 所述逆变侧特高压低端换流站包括:
第三电源输入模块, 用于接收输入的直流电, 并传送给第三电源变 换模块 ί
所述第三电源变换模块, 用于将所述输入的直流电转换为第四交流 电, 并传输至第二负荷区域。
60. 根据权利要求 54所述的逆变侧特高压换流站, 其特征在于, 所述逆变侧特高压高端换流站包括两个极性不同的高端阀厅; 所述逆变侧特高压中端换流站包括两个极性不同的中端阀厅; 所述逆变侧特高压低端换流站包括两个极性不同的低端阀厅。
61. 根据权利要求 60所述的逆变侧特高压换流站, 其特征在于, 所述逆变侧特高压高端换流站的两个极性不同的高端阀厅位于不同 的位置和 /或所述逆变侧特高压中端换流站的两个极性不同的中端 阀厅位于不同的位置和 /或所述逆变侧特高压低端换流站的两个极 性不同的低端阀厅位于不同的位置。
62. 一种特高压直流输电系统, 其特征在于, 所述系统包括权利 要求 46所述的整流侧特高压换流站和权利要求 54所述的逆变侧特 高压换流站, 其中, 所述整流侧特高压换流站中的整流侧特高压高 端换流站与所述逆变侧特高压换流站中的逆变侧特高压高端换流站 通过所述特高压直流输电线路相连。
63. 根据权利要求 62所述的特高压直流输电系统, 其特征在于, 所述整流侧特高压中端换流站的数量是一个或多个。
64. 根据权利要求 63所述的特高压直流输电系统, 其特征在于, 在所述整流侧特高压中端换流站为两个以上时, 依次级联所述两个 以上整流侧特高压中端换流站。
65. 根据权利要求 62或 63所述的特高压直流输电系统, 其特征 在于, 所述逆变侧特高压中端换流站的数量是一个或多个。
66. 根据权利要求 65所述的特高压直流输电系统, 其特征在于, 在所述逆变侧特高压中端换流站为两个以上时, 依次级联所述两个 以上逆变侧特高压中端换流站。
67. 根据权利要求 62所述的特高压直流输电系统, 其特征在于, 所述整流侧特高压高端换流站包括两个极性不同的高端阀厅; 所述整流侧特高压中端换流站包括两个极性不同的中端阀厅; 所述整流侧特高压低端换流站包括两个极性不同的低端阀厅。
68. 根据权利要求 67所述的特高压直流输电系统, 其特征在于, 所述两个极性不同的高端阀厅位于不同的位置和 /或所述两个极性 不同的中端阀厅位于不同的位置和 /或所述两个极性不同的低端阀 厅位于不同的位置。
69. 根据权利要求 62. 67和 68中任一项所述的特高压直流输 电系统, 其特征在于,
所述逆变侧特高压高端换流站包括两个极性不同的高端阀厅; 所述逆变侧特高压中端换流站包括两个极性不同的中端阀厅; 所述逆变侧特高压低端换流站包括两个极性不同的低端阀厅。
70. 根据权利要求 69所述的特高压直流输电系统, 其特征在于, 所述逆变侧特高压高端换流站的两个极性不同的高端阀厅位于不同 的位置和 /或所述逆变侧特高压中端换流站的两个极性不同的中端 阀厅位于不同的位置和 /或所述逆变侧特高压低端换流站的两个极 性不同的低端阀厅位于不同的位置。
PCT/CN2010/001349 2010-06-30 2010-09-06 特高压直流输电接线方法、换流站及特高压直流输电系统 Ceased WO2012000144A1 (zh)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US13/583,892 US9543762B2 (en) 2010-06-30 2010-09-06 Wire connecting method and converter station for ultra-high voltage direct current power transmission, and ultra-high voltage direct current power transmission system
EP10853850.5A EP2605358B1 (en) 2010-06-30 2010-09-06 Wire connecting method and converter station for ultra-high voltage direct current power transmission, and ultra-high voltage direct current power transmission system
BR112012023301-7A BR112012023301B1 (pt) 2010-06-30 2010-09-06 Método de conexão para transmissão UHVDC, estação conversora UVH e sistema de transmissão UHVDC

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN2010102231820A CN101882792B (zh) 2010-06-30 2010-06-30 一种用于特高压直流输电的接线方法及特高压换流站
CN201010223182.0 2010-06-30

Publications (1)

Publication Number Publication Date
WO2012000144A1 true WO2012000144A1 (zh) 2012-01-05

Family

ID=43054724

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2010/001349 Ceased WO2012000144A1 (zh) 2010-06-30 2010-09-06 特高压直流输电接线方法、换流站及特高压直流输电系统

Country Status (5)

Country Link
US (1) US9543762B2 (zh)
EP (1) EP2605358B1 (zh)
CN (1) CN101882792B (zh)
BR (1) BR112012023301B1 (zh)
WO (1) WO2012000144A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113162104A (zh) * 2021-04-28 2021-07-23 中国电建集团华东勘测设计研究院有限公司 一种适用于多端互联的海上柔性直流换流站直流场
CN114928088A (zh) * 2022-03-25 2022-08-19 黑龙江德恩电力集团有限公司 一种同塔双回直流输电系统低负荷无功优化方法

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR112013014380B1 (pt) * 2010-12-09 2020-10-20 State Grid Corporation Of China estação conversora em cascata e sistema de transmissão de energia hvdc de multiterminal em cascata
CN102082432B (zh) * 2010-12-09 2014-05-28 国家电网公司 级联换流站和级联多端高压直流输电系统
CN104426158B (zh) * 2013-08-21 2016-11-09 Abb技术有限公司 直流输电分层接入系统及方法
CN103530453B (zh) * 2013-09-30 2016-08-17 南方电网科学研究院有限责任公司 雷击输电线路引起特高压直流系统发生闭锁的分析方法
CN103701219A (zh) * 2013-12-31 2014-04-02 北京四方继保自动化股份有限公司 一种用于安全稳定控制系统信息传输的自愈方法
CN105205532A (zh) * 2015-08-26 2015-12-30 芜湖市凯鑫避雷器有限责任公司 基于神经网络遗传算法的带均压环结构的绝缘子优化方法
CN106547990B (zh) * 2016-11-24 2019-06-18 华北电力大学 特高压直流换流阀塔阀层集成宽频等效电路模型的建模方法
CN113270941B (zh) * 2021-05-28 2022-08-12 广东电网有限责任公司 低压交直流配电模态转换系统及其时序控制方法和装置
CN113315124B (zh) * 2021-05-31 2022-06-14 南方电网科学研究院有限责任公司 一种稳控策略生成方法、系统、计算机设备和存储介质
CN117200307B (zh) * 2023-09-04 2024-04-16 国网经济技术研究院有限公司 一种多端特高压直流输电拓扑结构及运行方法
CN120357922B (zh) * 2025-06-24 2025-08-22 国网经济技术研究院有限公司 一种串联多端直流不完整极换流站站间通信装置及方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101577417A (zh) * 2009-06-11 2009-11-11 西安交通大学 直流输电线路电流差动保护方法

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE419014B (sv) * 1978-02-21 1981-07-06 Asea Ab Kraftoverforing for hogspend likstrom
SE465343B (sv) * 1989-11-20 1991-08-26 Olof Magnus Lalander Anordning foer transformering av hoega elektriska effekter fraan en likspaenningsnivaa till en annan likspaenningsnivaa
US6858953B2 (en) * 2002-12-20 2005-02-22 Hawaiian Electric Company, Inc. Power control interface between a wind farm and a power transmission system
US20040125618A1 (en) * 2002-12-26 2004-07-01 Michael De Rooij Multiple energy-source power converter system
DE102005012371A1 (de) * 2005-03-09 2006-09-14 Siemens Ag Zwölfpuls-Hochspannungsgleichstromübertagung
AU2005334045B2 (en) * 2005-07-01 2010-08-26 Vestas Wind Systems A/S A variable rotor speed wind turbine, wind park, method of transmitting electric power and method of servicing or inspecting a variable rotor speed wind turbine
CN101297469B (zh) * 2006-01-18 2011-05-11 Abb技术有限公司 传输系统及其控制方法
BRPI0621040A2 (pt) * 2006-01-20 2011-11-29 Abb Technology Ltd conversor
WO2008002226A1 (en) * 2006-06-28 2008-01-03 Abb Technology Ltd. Modular hvdc converter
KR100795752B1 (ko) * 2006-07-06 2008-01-21 명지대학교 산학협력단 펄스다중화 보조회로를 이용한 전압원 컨버터의 직류송전시스템
DE102006031662A1 (de) * 2006-07-08 2008-01-10 Semikron Elektronik Gmbh & Co. Kg Stromrichterschaltungsanordnung für eine Hochvoltgleichspannungsverbindung
US7518266B2 (en) * 2006-11-01 2009-04-14 Electric Power Research Institute, Inc. Method and apparatus for improving AC transmission system dispatchability, system stability, and power flow controllability using DC transmission systems
EP2122797B1 (en) * 2007-01-29 2020-10-28 ABB Power Grids Switzerland AG Tapping power from a hvdc transmission system
EP2071694B1 (en) * 2007-12-11 2019-02-20 General Electric Company MVDC power transmission system for sub-sea loads
US8692408B2 (en) * 2008-12-03 2014-04-08 General Electric Company Modular stacked subsea power system architectures
US20100327599A1 (en) * 2009-06-30 2010-12-30 Vestas Wind Systems A/S Wind power plant predictive protection circuit
US8648495B2 (en) * 2009-11-23 2014-02-11 Ses Technologies, Llc Smart-grid combination power system
US7939970B1 (en) * 2010-07-26 2011-05-10 General Electric Company Variable frequency wind plant

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101577417A (zh) * 2009-06-11 2009-11-11 西安交通大学 直流输电线路电流差动保护方法

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
HU, JINSONG ET AL.: "Main Principle for Electrical engineering design of UHVDC Converter station.", SICHUAN ELECTRICAL POWER TECHNOLOGY., vol. 31, no. 3, June 2008 (2008-06-01), pages 4 - 8, XP008171149 *
LI, LIANG ET AL.: "Study on the Shared Ground Electrode of Xiangjiaba Converting Station.", ELECTRIC POWER SYSTEM., vol. 26, no. 8, 2007, pages 32 - 36, XP008171147 *
MA W. ET AL.: "Key Technical schemes for ±800kV UHVDC Project from Xiangjiaba to Shanghai.", POWER SYSTEM TECHNOLOGY, vol. 31, no. 11, June 2007 (2007-06-01), pages 1 - 5, XP055074991 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113162104A (zh) * 2021-04-28 2021-07-23 中国电建集团华东勘测设计研究院有限公司 一种适用于多端互联的海上柔性直流换流站直流场
CN113162104B (zh) * 2021-04-28 2022-06-28 中国电建集团华东勘测设计研究院有限公司 一种适用于多端互联的海上柔性直流换流站直流场
CN114928088A (zh) * 2022-03-25 2022-08-19 黑龙江德恩电力集团有限公司 一种同塔双回直流输电系统低负荷无功优化方法

Also Published As

Publication number Publication date
EP2605358A4 (en) 2016-11-02
BR112012023301A2 (pt) 2016-05-24
CN101882792B (zh) 2012-08-22
EP2605358A1 (en) 2013-06-19
US20130076118A1 (en) 2013-03-28
BR112012023301B1 (pt) 2023-11-14
CN101882792A (zh) 2010-11-10
EP2605358B1 (en) 2020-05-06
US9543762B2 (en) 2017-01-10

Similar Documents

Publication Publication Date Title
CN101882792B (zh) 一种用于特高压直流输电的接线方法及特高压换流站
Schön et al. High power HVDC-DC converters for the interconnection of HVDC lines with different line topologies
CN103269083B (zh) 一种多端高压直流输电系统
WO2014107842A1 (zh) 一种风力发电经大规模远距离并网的多端直流输电系统
CN105978362A (zh) 电能转换电路、充电机、充电站以及电动汽车充电系统
CN110137936A (zh) 一种楼宇低压直流供电系统
CN106786771A (zh) 一种能源互联网用能源路由器及能源处理方法
CN114771360A (zh) 一种电气化铁路交直流牵引供电构造及控制方法
CN106379200B (zh) 一种基于Vx牵引变压器的同相供电系统
CN210617908U (zh) 一种牵引变电所供电构造
CN104779814A (zh) 车载无工频电力电子变压器的一种拓扑结构
US20150244280A1 (en) Direct current power transmission networks operating at different voltages
CN205178525U (zh) 高压直流两端电网异步转换装置
CN106786732B (zh) 一种交直流微网群运行控制测试系统
CN110588449B (zh) 一种牵引变电所供电构造及其控制方法
CN105429176A (zh) 一种电气化铁路同相供电功率互馈实验系统
CN107666157A (zh) 一种交直流混联电网
CN102013819A (zh) 一种无变压器的高压直流输电拓扑结构
CN117200361A (zh) 一种蒲公英型配电网的组网方法
CN211530753U (zh) 交直流混合接线装置及交直流混合主变电所
CN116937530A (zh) 一种基于DC±10kV的地铁中压供电系统
CN201839219U (zh) 一种无变压器的高压直流输电拓扑结构
CN210183012U (zh) 一种输电系统
CN111355240B (zh) 一种轨道交通配电网系统、供电系统及再生能量逆变电路
CN107769211A (zh) 一种双电压等级交直流混合配用电系统

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 10853850

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 13583892

Country of ref document: US

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 2010853850

Country of ref document: EP

REG Reference to national code

Ref country code: BR

Ref legal event code: B01A

Ref document number: 112012023301

Country of ref document: BR

ENP Entry into the national phase

Ref document number: 112012023301

Country of ref document: BR

Kind code of ref document: A2

Effective date: 20120914