EP4320700A1 - Agencement de commutation et procédé pour connecter une installation de production d'énergie à un réseau de distribution d'énergie et la déconnecter de celui-ci - Google Patents

Agencement de commutation et procédé pour connecter une installation de production d'énergie à un réseau de distribution d'énergie et la déconnecter de celui-ci

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Publication number
EP4320700A1
EP4320700A1 EP22722694.1A EP22722694A EP4320700A1 EP 4320700 A1 EP4320700 A1 EP 4320700A1 EP 22722694 A EP22722694 A EP 22722694A EP 4320700 A1 EP4320700 A1 EP 4320700A1
Authority
EP
European Patent Office
Prior art keywords
voltage
power generation
transformer
network
contactor
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.)
Pending
Application number
EP22722694.1A
Other languages
German (de)
English (en)
Inventor
Jürgen MOSER
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP4320700A1 publication Critical patent/EP4320700A1/fr
Pending 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
    • H02J3/001—Arrangements for handling faults or abnormalities, e.g. emergencies or contingencies
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/04—Arrangements for preventing response to transient abnormal conditions, e.g. to lightning or to short duration over voltage or oscillations; Damping the influence of DC component by short circuits in AC networks
    • H02H1/043—Arrangements for preventing response to transient abnormal conditions, e.g. to lightning or to short duration over voltage or oscillations; Damping the influence of DC component by short circuits in AC networks to inrush currents
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/04—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/001—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection limiting speed of change of electric quantities, e.g. soft switching on or off
    • H02H9/002—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection limiting speed of change of electric quantities, e.g. soft switching on or off limiting inrush current on switching on of inductive loads subjected to remanence, e.g. transformers

Definitions

  • the invention relates to a switching arrangement for connecting a power generation system operated with a generator voltage to a power distribution network operated with a mains voltage above 1 kV and for disconnecting it, with a transformer being designed to convert the secondary-side generator voltage to the primary-side mains voltage and with the transformer on the primary side via a voltage line is connected to a transfer switch that connects the power plant to the power distribution network.
  • a switching arrangement for connecting a power generation system operated with a generator voltage to a power distribution network operated with a mains voltage above 1 kV and for disconnecting it, with a transformer being designed to convert the secondary-side generator voltage to the primary-side mains voltage and with the transformer on the primary side via a voltage line is connected to a transfer switch that connects the power plant to the power distribution network.
  • the mains voltage can be medium, high and/or extra high.
  • a medium voltage denotes a voltage between 1 kV and 60 kV, preferably a voltage between 10 kV and 30 kV, particularly preferably a voltage between 18 kV and 22 kV.
  • High voltage is a voltage between 60 kV and 150 kV.
  • a voltage between 150 kV and 1000 kV is referred to as extra high voltage.
  • the invention further relates to a method for connecting a power generation plant to a power distribution network operated with a mains voltage above 1 kV and for separating the power generation plant from the power distribution network, with a generator voltage of the power generation plant being converted to the mains voltage by means of a transformer and with the transformer on the primary side having a Voltage line is connected to a transfer switch that connects the power generation plant to the power distribution network.
  • a method for connecting a power generation plant to a power distribution network operated with a mains voltage above 1 kV and for separating the power generation plant from the power distribution network with a generator voltage of the power generation plant being converted to the mains voltage by means of a transformer and with the transformer on the primary side having a Voltage line is connected to a transfer switch that connects the power generation plant to the power distribution network.
  • the invention proposes the features of claim 1.
  • a current switch designed as a contactor is formed between the transformer and the transfer switch in the voltage line.
  • the power distribution grid can be operated with a grid voltage of more than 1 kV. It is advantageous if the mains voltage is high voltage or extra-high voltage. It is particularly advantageous if the voltage is a medium voltage. It is advantageous if the electricity distribution network is a medium-voltage network. It is advantageous if the voltage line is a medium-voltage line. It is advantageous if the electricity distribution network is a medium-voltage network.
  • the inventive design of a contactor between the transformer and the transfer switch in the voltage line has the advantage that the power generation system can be frequently disconnected from the power distribution network and reconnected before a mechanical or electrical failure of the switching elements occurs. By increasing the maximum number of possible switching cycles, the service life and reliability of the entire system and the associated electrical components can be increased and costs saved at the same time.
  • the aforementioned transfer switch can be a transfer switch operated by the operator of the electricity distribution network.
  • the above-mentioned switch can also be a transfer switch operated by the operator of the power generation system.
  • circuit breakers designed for network voltages above 1 kV, in particular for medium voltages.
  • Circuit breakers are mechanically more complex than contactors and also have a protective logic and protective mechanism and a protective function.
  • the primary function of a circuit breaker is grid protection in the event of faults such as short circuits, set overcurrents or ground faults.
  • the switching process usually takes place by storing energy in a spring element.
  • the spring element can be triggered in a defined manner by energizing a coil and releases the stored energy in a short time. In practice, this means that circuit breakers no longer function reliably after just a few thousand operations and require expensive maintenance or replacement.
  • Circuit breakers of this type can be designed, for example, as vacuum circuit breakers, such as the SION vacuum circuit breaker from Siemens® for voltage levels from 7.2 to 24 kV and for higher voltages.
  • the transfer switch is designed as a circuit breaker.
  • the transfer switch is usually in the power of disposal of the network operator, ie the operator of the electricity distribution network. A failure of the transfer switch can therefore lead to significant feed-in losses for the operator of the power generation plant. If such a transfer switch is provided, it fulfills protective functions, since he has to ensure the grid protection for the power generation plant.
  • Circuit breakers are usually also found in the local operator network of the power generation plant. These switches are often found in control cabinets. These circuit breakers are another source of wear and feed losses for the power plant operator.
  • a contactor has a much simpler mechanical design than a circuit breaker.
  • a contactor typically has a coil and an armature. The armature can be moved by energizing the coil and in this way can trigger the switching process.
  • a contactor can therefore be operated much more frequently than a circuit breaker before it fails or needs maintenance.
  • a contactor lacks protective functions that are essential for the operation of a power generation system. It is therefore provided according to the invention that a contactor is provided in addition to the transfer switch and possible further circuit breakers.
  • the circuit breakers allow the power generation system to be operated sufficiently safely, while the contactor makes it possible to frequently connect the power generation system to the power distribution network and disconnect it again without problematic wear on the switching elements occurring.
  • the contactor only has a switching function and no protective function.
  • a circuit breaker on the other hand, has a protective function and is usually unsuitable for switching.
  • the invention now recognizes for the first time that a consistent separation of the protective function and the separation function in two different switches avoids these disadvantages.
  • a contactor has a trigger that triggers a circuit of the contactor.
  • the trigger can be actuated manually or by a signal transmitted via a signal line.
  • the signal line can conduct a signal from a sensor, with the sensor being able to measure a physical quantity as described elsewhere.
  • no electrical properties are detected in the voltage line in which the contactor is arranged and sent to the release via a signal line. Rather, there is signal isolation between the trigger and the voltage line.
  • the circuit breaker is equipped with line protection functions and can respond to unwanted current changes that occur on the voltage line. For this purpose, it can be provided that an electrical property is detected in the voltage line in which the circuit breaker is arranged. The detected can then be processed. Depending on a result of the processing, the power switch can then change a property of a current flowing in the voltage line.
  • Such intelligent mechanisms that lead to network protection, however, are missing from the contactor.
  • a contactor In contrast to an isolating switch, a contactor has no visible isolating distance and is therefore free of isolating distances.
  • the invention enables the contactor to be used exclusively for switching, ie for switching on the power generation plant Power distribution network and for separating it can be used and is used. Grid stabilization in the event of faults cannot be achieved with the contactor.
  • the circuit breaker is provided for this purpose.
  • the separation of switching and network protection functions in different switching elements also has the advantage that the contactor can be arranged at different points in the switching arrangement.
  • the contactor can therefore be installed at any point in the voltage line on the primary side, before but also after the switchgear in which the circuit breakers are located.
  • the contactor is preferably a contactor designed for mains voltages above 1 kV.
  • the contactor is particularly preferably a contactor designed for medium voltages.
  • the contactor is particularly preferably a vacuum contactor.
  • Vacuum contactors are offered by Siemens®, for example, such as the 3TL vacuum contactors. Such vacuum contactors are distinguished by the fact that they consist of a medium-voltage part and a low-voltage part. One or more vacuum interrupters together with the main conductor connections form the medium-voltage part.
  • the low-voltage part includes components required for switching the vacuum tube/s, such as drive, switch-on latch and/or control.
  • the switching arrangement according to the invention is particularly advantageous for cases in which the power generation system is to be frequently disconnected from the power distribution network.
  • the invention is therefore particularly effective when the power generation system is not used to cover the base load.
  • These are preferably systems that can be switched on temporarily, preferably within a few minutes or hours, to cover power requirements that go beyond the base load.
  • These can be, for example, solar systems, wind power systems or pumped storage systems. These can generate electricity cyclically and/or according to short-term needs and/or depending on external environmental conditions such as sunshine or sufficient wind.
  • the power plant is therefore preferably a non-base load power plant and/or a power plant capable of handling peak loads.
  • the invention can also be used in base-load power plants that are operated as continuously as possible, such as nuclear power plants, coal-fired power plants, gas-fired power plants, oil-fired power plants or run-of-river power plants, but it is particularly advantageous in plants that do not permanently feed electricity into the power grid.
  • a solar system can be characterized in that it can convert solar energy into electrical, thermal or mechanical energy, such as a photovoltaic system or a solar thermal power plant.
  • the power generation system is not required, for example because the sun has set in a solar system designed as a photovoltaic system, it is advantageous to disconnect the power generation system from the power distribution network.
  • the transformers that transform the power from the power generation facility to the grid voltage continue to consume electricity to maintain the magnetic flux, which can be saved if the power generation facility is disconnected from the electricity distribution grid.
  • Solar systems currently remain connected to the power distribution network at night, which therefore has a negative effect on the system's profitability.
  • the switching elements are spared by the invention, it is possible to separate the power generation plant from the mains with almost no wear, which has a positive effect on the Economic efficiency of the power generation plant affects. Corresponding advantages can be achieved with other non-continuous current systems.
  • the switching elements of such power generation systems are also subject to increased wear in these systems, so that the invention can be particularly effective in these systems.
  • the contactor is preferably closed after the soft start of the transformer. When open, the contactor can isolate the entire power generation system from the power distribution network.
  • a soft switch-on device is designed for softly switching on the transformer.
  • the advantage of this is that the transformer is protected when it is switched on, where significant current peaks can occur without a soft start.
  • the combination of contactor and soft switching on of the transformer therefore enables the power generation system to be switched on and off with virtually no wear.
  • Soft switching on is preferably carried out by inductive pre-magnetizing of the transformer core.
  • This type of pre-magnetization is advantageous because only reactive power and no power loss occurs here; the latter, on the other hand, occurs when switching on softly by means of resistors.
  • the inductive pre-magnetization also has the advantage that heating of the soft switch-on device is avoided, that cooling times are not necessary and that the soft switch-on device can be switched on again immediately.
  • the soft start device can be connected to the voltage line via a power line.
  • the soft switch-on device can, in particular, receive a signal about the phase position from the voltage line. It can also be provided that the soft switch-on device with energy supplied from the power line.
  • the soft switch-on device is preferably connected to the transformer on the secondary side or on the primary side.
  • the soft switch-on device can therefore, among other things, fulfill the task of ensuring correct magnetization of the transformer core and/or adjusting the phase angle at the open contactor so that no voltage drops at the two terminals of the contactor.
  • the primary side refers to the voltage side, which is located between the transformer and the power distribution network. This can be operated with a voltage above 1 kV.
  • Secondary side in this context refers to the voltage side, which is located between the transformer and the power generation system.
  • the generator voltage can be, for example, between 400 volts and 690 volts, in particular 400 volts or 690 volts.
  • the generator voltage will be below the mains voltage.
  • the generator voltage is then stepped up to the mains voltage by means of the transformer.
  • the transformer is then designed accordingly for step-up transformation. However, in special situations, the generator voltage can also be above the mains voltage.
  • the generator voltage is then transformed down to the mains voltage by means of the transformer.
  • the transformer is then designed accordingly for step-down.
  • the generator voltage or feed can also be medium voltage or high or extra-high voltage.
  • the transformation ratio can be adjusted accordingly by retransforming to the mains voltage and suitable design of the transformer. If there are several transformers, it may be sufficient if the soft switch-on device is only formed on one of the several transformers, since the remaining transformers in the system are also connected to one another and are therefore also switched on softly when the transformer on which the soft switch-on device is formed is switched on softly.
  • a power connection string of a power generation system to whose transformer one or the soft switch-on device is connected can be referred to as the master connection string.
  • the other or the remaining power connection strings of the power generation system can be referred to as slave connection strings.
  • a slave connection string can be characterized in that the soft start device is not connected to its transformer. Due to the coupling of master connection string and slave connection string, soft switching on of the transformer of the master connection string can at the same time cause soft switching on of the transformer of a slave connection string.
  • a power generation system is connected to the power distribution network with a power connection string.
  • the soft switch-on device is connected to an auxiliary network, the auxiliary network being operated with a voltage below the medium voltage, preferably with the generator voltage.
  • the soft switch-on device is particularly preferably connected to the transformer on the secondary side.
  • the auxiliary network can be the network of the power generation plant. This offers the advantage that the soft start device does not have to be must be equipped with a transformer, thus saving costs.
  • the auxiliary network is the public low-voltage network. This is usually operated with less than 500 V, often with 230 V or three-phase with 400 V.
  • the soft switch-on device and/or the contactor can be designed for a wide voltage range, in particular for soft switching on for all voltages between 1 kV and 1000 kV, preferably for all voltages in the medium-voltage range.
  • the soft switch-on device can also be designed for a wide range of transformer powers. This has the advantage that the switching arrangement described can be used flexibly for different mains voltages and transformer ratings.
  • means for detecting the phase angle of the mains voltage of the power distribution network are formed.
  • the means can be used to measure a phase difference between the phases of the mains voltage which are present on the voltage line before and after the contactor.
  • means for detecting a phase difference are formed at terminals of the contactor. The detected phase position can be used to synchronize the transformer with the power distribution network. This can be important for a soft start of the transformer, since the synchronization prevents current peaks when the transformer is switched on by closing the contactor.
  • the means for detecting the phase position can also provide that a phase difference is determined between the phase of the primary-side mains voltage of the power distribution network and the phase of the voltage generated by the power generation system on the secondary side of the transformer.
  • the features of the subordinate claim directed to a method for connecting a power generation system to a power distribution network and for disconnecting from it are provided according to the invention.
  • a current switch designed as a contactor and between the transfer switch and the transformer is switched.
  • the electricity distribution network is a medium-voltage network.
  • a transformer before the power generation system is connected to the power distribution network, a transformer is switched on gently by means of a soft switch-on device. This has the advantage that current peaks are prevented with this device when the transformer is switched on and thus, in combination with the switching on by the contactor, the number of maintenance-free switching cycles of the power generation system and its switchgear can be significantly increased.
  • the soft switch-on device is deactivated after the power generation system has been switched on. This improves the energy efficiency of the system and further reduces wear.
  • a phase position of the power distribution network is determined and that the transformer is synchronous with the phase position is switched on softly. In this way, harmful current peaks can be prevented when switching on the transformer, which protects it, so that in combination with switching on and off by the contactor, the maintenance-free switching cycles of the power generation system can be increased.
  • the soft switch-on device is fed from a current which is tapped off between the transfer switch and the contactor. This enables the soft start device to be supplied with power even if the contactor is open.
  • the power supply of the soft switch-on device can also be ensured if it is provided that the soft switch-on device is fed from an auxiliary network which has a voltage below the medium voltage, in particular the generator voltage.
  • the auxiliary network can in particular be the network of the power generation plant or the public low-voltage network.
  • a value of a power generation variable of the power generation plant is measured using a sensor and that the contactor is switched depending on a criterion, the criterion including the measured value.
  • the contactor is switched in such a way that the electrical line between the power generation system or systems and the power distribution network is interrupted. This has the advantage that electricity can be saved and components are protected.
  • the power generation variable can be a current or a voltage generated by one or more power generation modules be.
  • the power generation magnitude may also be another response of the power plant to a power generating cause, such as a rotor speed of a wind turbine.
  • the power generation variable can also be a physical variable that is the cause of the power generation by the power generation plant, such as wind strength or solar radiation strength.
  • the criterion can be given, for example, by a threshold value of the power generation variable.
  • the switching status of the contactor can depend on whether the value of the current generation variable exceeds or falls below the threshold value. For example, it can be provided that the contactor is closed when the solar radiation level is exceeded and that the contactor is opened when the solar radiation level falls below this level.
  • the built-in contactor can disconnect solar systems from the power distribution grid at night when no solar energy can be generated. Provision can also be made for wind turbines to be disconnected from the electricity distribution network when there is no wind. This can protect components and increase the service life of such systems.
  • the sensor can be installed at a suitable place.
  • the sensor can be arranged at one of the power generation systems, at a control unit for soft switching on of the transformer, ie in particular at the soft switching device, or at another location where reliable conditions exist for detecting the value of the power generation variable.
  • the contactor is formed between the transfer switch and a circuit breaker, the circuit breaker in the voltage line between the contactor and the Transformer is formed.
  • a circuit breaker can be provided to protect the power generation plant from short circuits or other defects.
  • the combination of contactor and circuit breaker is particularly advantageous because on the one hand the circuit breaker ensures network security and on the other hand the contactor protects the circuit breaker from wear and tear that would occur if the circuit breaker had to connect and disconnect the power generation system to and from the power distribution network.
  • Such a circuit breaker can also be installed in a mains voltage switchgear, in particular medium-voltage switchgear, which can connect one or more than one power generation system to the power distribution network.
  • FIG. 1 shows a first exemplary embodiment of a switching arrangement designed according to the invention with a contactor and a soft switch-on device which is connected to the transformer on the primary side;
  • Fig. 2 shows a second embodiment of an inventive circuit arrangement with a
  • FIG. 3 shows a third embodiment of a switching arrangement designed according to the invention with a
  • Soft switch-on device which is connected to the transformer on the secondary side and has more than one slave
  • FIG. 1 shows a switching arrangement 1 with a soft switch-on device 9 which is connected to the transformer 4 on the primary side.
  • a power generation system 2 shown in one form as a solar system 23, is connected to a transformer 4 via an electrical line 5 on the secondary side.
  • the transformer 4 transforms the generator voltage generated on the secondary side by the power generation plant 2 to the mains voltage on the primary side above 1 kV, which can in particular be a medium voltage.
  • the generation voltage can be, for example, 400 V, as is customary in solar systems, or 690 V, as is customary in wind turbines.
  • the medium voltage can be 20 kV, for example.
  • Another power generation system 2 in this case also in the form of a solar system 23 , is connected on the secondary side to a further transformer 4 via a further electrical line 5 .
  • the transformer 4 transforms the generator voltage 5 on the secondary side to the mains voltage on the primary side.
  • a soft start device 9 is an electrical Line 15 is connected to a voltage line 18 at a portion between the transfer switch 7 and the contactor 8.
  • the transfer switch 7 is a circuit breaker.
  • the transfer switch is the interface to the power distribution network 3 .
  • the soft switch-on device 9 is connected on the primary side to a section of an electrical line 6 which lies between the transformer 4 and the contactor 8 .
  • the connection section can be connected between the transformer 4 and another circuit breaker, which can be installed in the mains voltage switchgear 12, for example.
  • a deactivation device 14 belongs to
  • Soft switch-on device 9 and can turn it on and off.
  • a mains voltage switchgear 12 is connected to the transformers 4 via electrical lines 6 .
  • the mains voltage switchgear 12 has the purpose of individual or all
  • the mains voltage switchgear 12 protects the networks of the power generation plants 2.
  • mains voltage switchgear 12 is connected to the contactor 8 via an electrical line 21 .
  • the contactor 8 can be formed by the lines 18 and 21
  • Power distribution network 3 is formed between the electrical lines 18 and 21 and with these via an electrical
  • the device 10 is therefore connected to the voltage line 18 , 21 in front of and behind the contactor 8 and can therefore detect a phase position of the power distribution network 3 immediately in front of the contactor 8 . It can be provided in particular that with the device 10 a phase difference between the Potentials can be measured which are present on the voltage line 18, 21 immediately before and immediately after the contactor.
  • the phase angle 10 is transmitted to the soft switch-on device 9 via a signal line 25 . This then turns on the transformer 9 synchronously with the phase position of the power distribution network 3 .
  • a sensor 11 is formed in the power generation systems 2 and is connected to the contactor 8 via a signal line 22 .
  • the sensor 11 of the solar system 23 measures the voltage generated by the solar system. If a threshold value of a predetermined voltage is exceeded, the contactor 8 is closed. If the measured voltage is below the threshold value, the contactor 8 remains or is opened.
  • the signal measured by the sensor 11 can be compared with the threshold value in the power generation system 2 or alternatively in a control module that is connected to the contactor 8 .
  • the contactor 8 is switched in a corresponding manner to the solar system 23 depending on whether a predetermined threshold value is exceeded or not reached. Before a comparison with the threshold value, the measurement signals can be filtered or processed in some other way in order to ensure, for example, that the power generation system is only disconnected if the threshold value is exceeded or fallen below for a longer period of time.
  • the transfer switch 7 connects those described
  • a voltage converter 26 is formed on the two voltage lines on contactor 8 .
  • the exemplary embodiment illustrated in FIG. 1 has a master connection string and a slave connection string.
  • Fig. 2 shows another embodiment of a switching arrangement 1 according to the invention with a soft switch-on device 9.
  • the switching arrangement 1 is largely identical to the switching arrangement shown in FIG.
  • the soft switch-on device 9 is not connected to the primary side but to the transformer 4 on the secondary side.
  • the soft switch-on device 9 is connected via an electrical line 20 between the power generation system 2 and the transformer 4 .
  • the soft switch-on device 9 is not supplied with power via the voltage line 18, 21, but via an electrical line 19 from an auxiliary network 13.
  • the auxiliary network 13 is in the position shown in Fig .
  • the public low-voltage network could also be supplied by the power generation systems 2, which in this case provide the auxiliary network 13.
  • the power generation plants 2 are designed as wind power plants 24 .
  • the sensor 11 measures the wind force. If the wind force falls below a predetermined threshold value, the contactor 8 disconnects the power generation systems 2 from the power distribution network 3.
  • FIG. 3 shows a further exemplary embodiment of a switching arrangement 1 according to the invention with a soft switch-on device 9.
  • the switching arrangement 1 is largely identical in design to the switching arrangement 1 shown in FIG.
  • the switching arrangement 1 in FIG. 2 has a total of three power generation systems 2 with a master connection string and two slave connection strings.
  • the number of power generation plants 2 can vary
  • the soft switch-on device 9 can be connected to the transformer 4 of the master connection string on the primary or secondary side, and the soft switch-on device can be fed from the power distribution network, a low-voltage network or the network of the power generation plants 2.
  • the type of power generation systems 2 can vary as solar systems 23, wind power systems 24 or another type of system. Provision can also be made for the connected power generation plants 2 to be different.
  • a first power generation plant 2 can be a solar power plant 23 and a second power generation plant 2 can be a wind power plant 24 .
  • a single contactor 8 is shown in each case, which disconnects all power generation systems 2 from the power distribution network 3 or connects them to it. More than one contactor 8 can also be provided. This can be particularly useful when more than one power generation plant 2 is provided. This can be particularly useful if different types of power generation systems 2 are provided. For example, it can be provided that a first contactor 8 switches one or more power generation plants 2 and that a second contactor switches another or other power generation plants 2 . The contactors 8 are then connected in parallel. It can also be provided be that two contactors 8 are connected in series one behind the other.
  • Such a partial connection can be particularly useful when the partial connection affects different types of power generation plants. For example, it can be provided that a solar installation and a wind power installation are to be switched under different conditions, since the solar radiation and the wind speed are not strictly linked to one another. A cascading connection of the contactors 8 can therefore further improve the efficiency of the system and the service life of the switching elements.
  • the invention relates to a switching arrangement 1 and a method for connecting a power generation plant 2 to a power distribution network 3 and for disconnecting it, a transformer 4 being designed to convert the secondary-side generator voltage to the primary-side network voltage above 1 kV, characterized in that between the transformer 4 and a transfer switch 7 in the voltage line 18, 21 designed as a contactor 8 current switch is formed.

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  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

L'invention concerne un dispositif de commutation (1) et un procédé de connexion d'une installation de production d'énergie (2) à un réseau de distribution d'énergie (3) et de sa déconnexion de celui-ci, un transformateur (4) étant conçu pour transformer la tension de générateur sur le côté secondaire en tension de ligne supérieure à 1 kV sur le côté primaire, caractérisé en ce qu'un disjoncteur sous la forme d'un contacteur (8) est placé entre le transformateur (4) et un disjoncteur d'attache (7) dans la ligne de tension (18, 21).
EP22722694.1A 2021-04-09 2022-04-08 Agencement de commutation et procédé pour connecter une installation de production d'énergie à un réseau de distribution d'énergie et la déconnecter de celui-ci Pending EP4320700A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP21167606.9A EP4071955A1 (fr) 2021-04-09 2021-04-09 Agencement de commutation et procédé de connexion d'un système de production d'électricité à un réseau de distribution d'électricité et son procédé de déconnexion
PCT/EP2022/059443 WO2022214661A1 (fr) 2021-04-09 2022-04-08 Agencement de commutation et procédé pour connecter une installation de production d'énergie à un réseau de distribution d'énergie et la déconnecter de celui-ci

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EP4320700A1 true EP4320700A1 (fr) 2024-02-14

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EP21167606.9A Withdrawn EP4071955A1 (fr) 2021-04-09 2021-04-09 Agencement de commutation et procédé de connexion d'un système de production d'électricité à un réseau de distribution d'électricité et son procédé de déconnexion
EP22722694.1A Pending EP4320700A1 (fr) 2021-04-09 2022-04-08 Agencement de commutation et procédé pour connecter une installation de production d'énergie à un réseau de distribution d'énergie et la déconnecter de celui-ci

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EP21167606.9A Withdrawn EP4071955A1 (fr) 2021-04-09 2021-04-09 Agencement de commutation et procédé de connexion d'un système de production d'électricité à un réseau de distribution d'électricité et son procédé de déconnexion

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EP (2) EP4071955A1 (fr)
WO (1) WO2022214661A1 (fr)

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DE202007016800U1 (de) * 2007-12-01 2009-04-02 Repower Systems Ag Windkraftanlage mit Synchronisierungsschalter
DE102012104005A1 (de) * 2012-05-07 2013-11-07 Adensis Gmbh Photovoltaikanlage und Verfahren zum Betreiben einer Photovoltaikanlage zur Einspeisung von elektrischer Leistung in ein Mittelspannungsnetz

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EP4071955A1 (fr) 2022-10-12
WO2022214661A1 (fr) 2022-10-13

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