WO2001065653A1 - Gas insulated device and failure rating method - Google Patents
Gas insulated device and failure rating method Download PDFInfo
- Publication number
- WO2001065653A1 WO2001065653A1 PCT/JP2000/001199 JP0001199W WO0165653A1 WO 2001065653 A1 WO2001065653 A1 WO 2001065653A1 JP 0001199 W JP0001199 W JP 0001199W WO 0165653 A1 WO0165653 A1 WO 0165653A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- current
- gas
- bushing
- carrying conductor
- voltage
- 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
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/065—Means for detecting or reacting to mechanical or electrical defects
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/142—Arrangements for simultaneous measurements of several parameters employing techniques covered by groups G01R15/14 - G01R15/26
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/027—Integrated apparatus for measuring current or voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/0356—Mounting of monitoring devices, e.g. current transformers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/16—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using capacitive devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1254—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of gas-insulated power appliances or vacuum gaps
Definitions
- the present invention relates to a gas insulation device installed in an electric station such as a switchyard or a substation, and a method of locating a fault thereof.
- Conventional gas insulation devices include, for example, a circuit breaker unit, a disconnector unit, a current transformer unit for an instrument, a transformer unit for an instrument, and a lightning arrester, as described in Japanese Patent Application Laid-Open No. 10-210613. It also has push and push units, shortening the spacing between the pushers to reduce the size and reduce the installation area.
- the current transformer and the voltage divider are located at both ends of the circuit breaker, and the protection range of the current transformer and the voltage divider is narrowed.For example, a ground fault occurring inside the gas insulation device However, it is determined that a ground fault has occurred outside. Therefore, the reliability of the gas insulation device is reduced. Disclosure of the invention
- the basic features of the present invention are: a sensor section of a device for measuring current and / or voltage of a line from a power inlet to an outlet, and a bushing provided at the power inlet or the power outlet or both.
- the composite in the present invention means that the sensor unit and the bushing are mechanically and functionally coupled, and the measurement of current and / or voltage and the drawing or drawing of electric power can be performed by one bushing. means.
- the bushing constitutes a lead-in terminal for drawing power from the transmission line into the gas insulation device or a lead-out terminal for drawing power from the gas insulation device to the transmission line.
- Pushing refers to an insulator tube that is an insulating tube, a current-carrying conductor that is installed inside the insulator tube, an electric field relaxation member that is installed inside the insulator tube, that is arranged to face the outer periphery of the current-carrying conductor, and that is installed outside the insulator tube. It includes an electric field relaxation member, an electrode for electrically connecting a current-carrying conductor and another member, for example, an electric wire. In some cases, the electric field relaxation member is omitted from the pushing.
- the present invention focuses on a space formed inside a porcelain tube and combines the sensor part with the pushing to install the sensor part in that space. It is.
- the space inside the insulator tube is preferably a space on the outer peripheral side of the electric field relaxation member installed inside the insulator tube.
- the sensor may be installed on the inner peripheral side of the electric field relaxation member installed inside the insulator tube. In this case, it is preferable to install the sensor so as not to greatly affect the potential distribution. Good. Also, it can be installed together with the electric field relaxation member installed outside the insulator tube.
- a current transformer also called a winding type current transformer
- a current transformer also called an air-core type current transformer or Rogowski coil
- a voltage divider that electrostatically divides the voltage between the conductor through which the current flows and the ground, for example, the electric field relaxation member at the ground potential, may be used as the sensor of the voltage measuring device. preferable.
- a detection electrode is installed in a space formed on the outer peripheral side of the intermediate potential electrode, and electrostatic voltage is applied between the intermediate potential electrode and the ground tank to detect the potential of the intermediate potential electrode.
- a voltage divider for electrostatically dividing a voltage between a conductor and an electric field relaxation member is not installed on the outer peripheral side of the electric field relaxation member.
- the current transformer unit and the transformer unit conventionally configured and installed as a single unit can be omitted. Therefore, the size of the gas insulation device can be reduced.
- the above-mentioned complex was realized using the space formed inside the insulator tube, the development, design, and production of new equipment was required. However, it can be realized by slightly improving or modifying the equipment. Therefore, it can be achieved without significantly increasing the cost of the gas insulating device.
- a current and / or a voltage is measured at a power inlet and a power outlet located at an end of the gas insulating device, and the measurement result is obtained. Since the fault point due to ground fault or the like is located on the basis of the above, the protection range of the equipment that measures the current and / or the voltage can be expanded. Therefore, the reliability of the gas insulation device can be improved.
- the measurement results at the power inlet and the power outlet are compared, and based on the consistency of their polarities, the method of locating the fault point and the difference in the measurement time of the fault signal are used.
- the method of locating the failure point is used. According to these methods, it is possible to determine whether a failure point due to ground fault discharge or the like is inside or outside the gas insulation device, or to which part inside the gas insulation device a failure point due to ground fault discharge or the like is located. .
- FIG. 1 is a new view showing an internal configuration of a gas insulating bushing according to a first embodiment of the present invention.
- FIG. 2 is an external view showing the configuration of a gas-insulated switchgear provided with the gas-insulated pushing of FIG. 1, and is a combination of single-connection diagrams.
- FIG. 3 is a plan view showing a configuration of a flange member which is a component of the gas insulating pusher shown in FIG.
- FIG. 4 is a sectional view taken along the line IV-IV in FIG.
- FIG. 5 is a perspective cross-sectional view showing the configuration of an internal shield and a voltage divider, which are components of the gas insulating pushing shown in FIG. 1, and shows four examples of configurations (a) to (d).
- FIG. 6 illustrates the method for locating a ground fault. It is a time chart for the.
- FIG. 7 is a sectional view showing a configuration of a gas-insulated switchgear according to a second embodiment of the present invention.
- FIG. 8 to FIG. 20 are cross-sectional views showing the internal configuration of the gas insulated bushing provided in the gas insulated switchgear, showing the third to fifteenth embodiments of the present invention.
- the gas insulated switchgear of this embodiment is a composite switchgear in which an aerial bus (not shown) is electrically connected, and constitutes one phase. Therefore, at substations and other substations, three gas-insulated switchgears according to the present embodiment are arranged side by side for each bay.
- reference numeral 100 denotes a circuit breaker unit in which a circuit breaker 1 is housed in a tank 2 filled with SF 6 gas (sulfur hexafluoride gas) as an insulating medium.
- the circuit breaker 1 has a pair of contacts consisting of a fixed contact and a movable contact, and interrupts an accident current by this separating operation, and is operated by an operating device (not shown).
- the tank 2 is a metal cylindrical container and is grounded.
- the disconnector 3 On one side of the circuit breaker Yuni' sheet 1 0 0 is provided with a disconnector Yunitto 1 1 0 configured to house the disconnecting switch 3 into a tank SF 6 gas is sealed.
- the disconnector 3 has a pair of contacts consisting of a fixed contact and a movable contact.
- the disconnecting operation separates the circuit on the circuit breaker 1 side from the circuit on the line A side. It is electrically connected to the circuit breaker 1 via a connection conductor provided in the pulser 5, and is operated by an operating device (not shown).
- Tank 4 is a T-shaped cylindrical container made of metal, grounded, and the circumference of tank 2 at one axial end. It is mechanically connected to the part branched upward from the wall via an insulating spacer 5.
- the disconnector 6 has a pair of contacts consisting of a fixed contact and a movable contact, and separates the circuit on the circuit breaker 1 side from the circuit on the line B side by this opening operation. It is electrically connected to the circuit breaker 1 via a connection conductor provided on the spacer 8 and is operated by an operating device (not shown).
- the tank 7 is a metallic T-branch cylindrical container, which is grounded and mechanically connected to a portion of the tank 2 that branches upward from the peripheral wall at one axial end side via an insulating spacer 8. .
- connection Yuni' sheet 1 0 0 side of the disconnector Yuni' sheet 1 1 0 is provided with a connection Yuni' sheet 1 3 0 configured to house the power conductor 9 in the tank 1 in 0 to SF 6 gas is sealed .
- the connection unit 130 mechanically and electrically connects the disconnector unit 110 to the gas insulating bushing 150.
- the conducting conductor 9 is a rod-shaped conductor made of aluminum, and is electrically connected to the disconnecting switch 3 via a connecting conductor provided on the insulating spacer 11.
- the tank 10 is a metal T-shaped cylindrical container, is grounded, and is mechanically connected to the tank 4 via an insulating spacer 11.
- the anti-breaker Yuni' sheet 1 0 0 side of the disconnector Yuni' sheet 1 2 0, provided the connection Yuni' sheet 1 4 0 SF 6 gas is stored constitute the current conductor 1 2 in the tank 1 3 enclosed I have.
- the connection unit 140 mechanically and electrically connects the disconnector unit 120 and the gas insulating bushing 160.
- the current-carrying conductor 9 is a rod-shaped conductor made of aluminum, and is electrically connected to the disconnector 6 via a connection conductor provided on the insulating spacer 14.
- Tanks 1 3 This is a metal T-shaped cylindrical container, which is grounded and mechanically connected to the tank 7 via an insulating spacer 14.
- a gas-insulated bushing 150 is provided on the anti-disconnector unit 110 side of the connection unit 130 to constitute a power inlet A of the gas-insulated switchgear, that is, a power inlet terminal.
- a gas isolation pusher 160 is provided on the side of the disconnecting unit 120 of the connection unit 140 to form a power outlet B of the gas insulated switchgear, that is, a power outlet terminal. Both pushings have the same configuration.
- Gas insulated bushing 1 5 0 (1 6 0) is energized conductor extending continuously from the connecting on the center axis of the porcelain bushing 1 5 SF 6 gas is sealed Yuni' Bok 1 3 0 (1 4 0) 9 (1 2) is arranged and configured.
- the insulator tube 15 is a truncated cone-shaped insulating tube (made of porcelain), and has a plurality of pleated protrusions formed on the outer peripheral side.
- the truncated cone shape means a three-dimensional shape between the cut end and the bottom surface when the cone is cut along a plane parallel to the bottom surface.
- the frustoconical shape means a three-dimensional shape in which a plane parallel to the bottom surface is similar and gradually increases from the top surface to the bottom surface.
- the 'A flange member 17 is fixed to the upper end of the insulator tube 15 with an adhesive.
- the flange member 17 is an annular member made of metal.
- the electrode 18 is mechanically connected to the flange member 17.
- the electrode 18 is a metal disk member, and a current-carrying conductor 9 (12) is electrically connected to the side of the insulator tube 15 and a drop-in wire drawn from the aerial bus is connected to the side of the anti-insulator tube 15 (Not shown) are electrically connected.
- An outer shield 19 is provided on the upper end side of the insulator tube 15.
- An outer shield 20 is provided at the lower end of the insulator tube 15. External seal
- the nodes 19 and 20 are formed by overlapping a plurality of aluminum annular members with a gap therebetween, and are electric field relaxation members provided so as to surround the upper and lower ends of the insulator tube 15.
- An inner shield 21 is provided at the lower end side of the insulator tube 15.
- the inner shield 21 is an aluminum cylindrical member for mitigating the electric field near the boundary between the lower ends of the porcelain tubes 1 and 5 and the tank 10 (13).
- the conductor 9 (1 2) is provided so as to surround the periphery of the current-carrying conductor 9 (12).
- the lower end of the inner shield 21 is bent outwardly at a right angle and without a corner, and is sandwiched between the flange member 16 and the flange portion of the tank 10 (13). Thereby, the inner shield 21 is supported and grounded.
- the upper end of the inner shield 21 is bent outward in an arc shape. This alleviates the electric field at the upper end of the inner shield 21.
- a current transformer 22 and a voltage divider 23 are installed in a space formed on the outer peripheral side of the inner shield 21, that is, in a space between the inner shield 21 and the insulator tube 15.
- the current transformer 22 constitutes a sensor unit (or a detection unit) of the current measuring device.
- the voltage divider 23 is configured as a sensor unit (or a detection unit) of a voltage measuring device.
- an air-core type current transformer (also called Rogowski coil) in which an insulated winding is wound around an annular insulation member or an insulation winding is wound around an annular iron core member
- a winding type current transformer is used.
- Air-core type current transformers have the advantage that they are lighter than wound-type current transformers and do not have magnetic saturation, so they are easier to handle than wound-type current transformers.
- an optical fiber sensor can be used instead of the current transformer 22.
- the voltage divider 2 3 is connected to the inner shield 21 which is the ground potential and the conducting conductor 9 (1 2). Is a voltage dividing electrode for electrostatically dividing the voltage between the electrodes.
- the voltage dividing electrode is a metal (aluminum) cylindrical member, and the outer periphery of the inner shield 21 is opposed to the current-carrying conductor 9 (1 2) through the through hole 21a formed in the inner shield 21. It is provided on a wall via an insulating member 24. With such a configuration, C is formed between the current-carrying conductor 9 (12) and the voltage divider 23, and C 2 is formed between the voltage divider 23 and the internal shield 21. You.
- Figures 5 (a) to (d) show examples of the configuration of the internal shield 21 and the voltage divider 23.
- a plurality of rectangular through holes 2la are formed in the peripheral wall of the inner shield 21 and the inner shield 21 is formed so as to cover the opening of the through hole 21a.
- An insulating member 24 is provided on the outer peripheral wall of the vehicle, and a voltage divider 23 is provided on the outer peripheral side.
- the through-hole 21a is formed by dividing the inner shield 21 into an upper part 21b and a lower part 21c, and mechanically connecting a plurality of parts by a servo 21d. .
- FIG. 5 (b) is an improved example of FIG. 5 (a), in which a through hole 24a having the same size as the through hole 21a is formed in the insulating member 24.
- the insulating member 24 may be any material that electrically insulates the inner shield 21 from the voltage divider 23 and supports the voltage divider 23 on the outer peripheral wall of the inner shield 21. Therefore, it is not necessary to close the opening of the through hole 21a with the insulating member 24.
- the voltage divider 23 is used as an intermediate potential electrode between the inner shield 21 which is the ground potential and the current-carrying conductor 9 (12). On the outer peripheral wall of the inner conductor 21, and the electrostatic voltage can be divided between the inner shield 21 and the current-carrying conductor 9 (12).
- the voltage divider 2 3 but can be provided without the intervention of the insulating member 2 4, the electrostatic capacitance C have C 2 changes due to heat or vibration, because the measurement accuracy suppress that you drop As shown in Fig. 5 (a) and (b) above, It is preferable to provide it via the material 24. Further, by varying the thickness of the insulating member 24 changes its dielectric constant, some Inami electrical capacitance to vary the magnitude of the capacitance C 2 (: by varying the size of the E, min The partial pressure ratio of the pressure device 23 can be freely changed.
- Fig. 5 (c) does not show the through-hole 21a formed by assembling the pads as in Figs. 5 (a) and (b), but cuts the peripheral wall of the inner shield 21. A through hole 21a was formed.
- the peripheral wall of the inner shield 21 is hollowed out to form a through hole 21a, so that the mechanical strength of the inner shield 21 is not significantly reduced. .
- the reliability of the gas insulation pushing can be improved. Note that the opening of the through hole 2 la may not be closed by the insulating member 24.
- FIG. 5 (d) is an improved example of FIG. 5 (a), in which a shield member 26 is provided on the outer peripheral side of the voltage divider 23 via an insulating member 25.
- the shield member 26 is a grounded metal (aluminum) cylindrical member having a size equal to or larger than that of the voltage divider 23.
- the insulating member 25 is for electrically insulating the voltage divider 23 and the shield member 26 from each other.
- the flange member 16 is an annular member made of metal, and is mechanically connected to a flange portion of the tank 10 (13).
- the flange member 16 is provided with signal extraction sections 16a and 16b.
- the signal extraction sections 16a and 16b are configured so that the current and voltage signals detected by the current transformer 22 and the voltage divider 23 can be extracted to the outside, and the center point of the flange member 16 is provided. It is provided so as to face the same straight line (diameter line) passing through. Both have the same configuration, and their configurations are shown in Figs.
- the signal extraction portion 16 a (16 b) has a cylindrical through hole 16 c communicating from the inner peripheral wall side of the flange member 16 to the outer peripheral wall side, and one end side of the through hole 16 c (flange member).
- the sleeve 16 d fixed to the inner peripheral wall of the through hole 16 by welding, and the sleeve 16 e fixed to the other end of the through hole 16 c (the outer peripheral wall of the flange member 16) by welding.
- the sleeves 16d and 16e are cylindrical members made of an iron-nickel-cobalt alloy and are provided with nickel plating.
- the insulators 16f and 16g are insulating members made of ceramics mainly composed of alumina, and are cylindrical solid members.
- the pin 16h (16i) is a round bar-shaped member made of iron-Nigel-cobalt alloy, nickel-plated, and a flange member 16 Is a conductive member extending from the inner peripheral side to the outer peripheral side.
- a groove 16 j is provided on the lower wall surface of the flange member 16.
- the groove 16 j is an annular groove having a rectangular cross section.
- a sealing member for example, a throat such as an o-ring is fitted into the groove 16 j.
- a plurality of port holes 16 k are provided at predetermined intervals on the periphery of the flange member 16. By inserting and tightening the porto in the porthole 16k, the insulator tube 15 and the tank 10 (13) can be mechanically connected.
- a filter 27 is electrically connected to the current transformer 22 and the voltage divider 23 via a pin 16h (16i).
- the filter 27 removes a high-frequency surge signal component included in the analog signal output from the current transformer 22 and the voltage divider 23.
- a signal processing device 28 is electrically connected to the filter 27.
- the signal processor 28 digitally processes the analog signal output from the filter 27.
- An EZO converter 29 is electrically connected to the signal processing device 28.
- the EZO converter 29 converts a digital electric signal output from the signal processing device 31 into an optical signal.
- a monitoring control device 30 is connected to the EZO converter 29 via an optical cable. The monitoring and control device 30 obtains the current and voltage values based on the optical signal output from the E / 0 converter 29, displays the values, outputs the operation signals of the circuit breaker based on the values, and outputs a ground fault. It performs point orientation and the like.
- the output current and voltage detection signals are input to the filter 27, and the signal components of the high frequency surge are removed.
- the current and voltage detection signals from which the signal components of the high frequency surge have been removed are input to the signal processing device 28 and subjected to digital processing.
- the digitally processed current and voltage signals are input to the EZO converter 29 and converted into optical signals.
- the current and voltage signals converted into optical signals are input to the monitoring and control device 30 via an optical cable, and the current and voltage values are calculated based on the signals.
- the output ground fault signal is sent to the monitoring control device 30 via the filter 27, the signal processing device 28, the EZ 2 converter 29, and the optical cable in the same manner as in the current and voltage measurement operations described above. Is entered. As a result, the monitoring and control device 30 locates the ground fault point based on the input ground fault signal.
- a ground fault occurs inside the gas-insulated switchgear. It can be determined whether it is produced or generated externally. In other words, if the polarity of the ground fault signal detected and output by the gas insulated bushing 150 sensor matches the polarity of the ground fault signal detected and output by the gas insulated bushing 160 sensor, Can be identified as a ground fault that has occurred outside the gas insulated switchgear (ground fault on the transmission line side caused by lightning, etc.). It can be specified as the generated ground fault discharge (ground fault on the device side caused by foreign matter intrusion, etc.).
- the ground fault occurs inside the gas insulated switchgear, it is possible to determine where in the gas insulated switchgear the fault occurred. For example, when the measurement time difference ⁇ t of the ground fault is 0, it is assumed that the error occurred at the same distance, that is, at the part where the distance from the sensor of the gas insulation bushing 150 and the distance from the sensor of the gas insulation bushing 160 are equal Can be oriented.
- the current transformer 22 and the voltage divider 23 are installed in the space on the outer peripheral side of the inner shield 21, that is, in the space between the insulator tube 15 and the inner shield 21. Since the current and voltage flowing through the current-carrying conductor 9 (12) were measured, the current transformer unit and the transformer unit, which were conventionally configured and installed as a single unit, were omitted. Can be. Therefore, the size of the gas insulated switchgear can be reduced.
- the current transformer 22 and the voltage divider 23 are installed in the space between the insulator tube 15 and the inner shield 21, so that the gas-insulated pushing 150 (160)
- the potential distribution at the time of energization is not significantly changed by the current transformer 22 and the voltage divider 23. Therefore, the dielectric strength of the gas insulating bushing is not significantly reduced due to the change in the potential portion.
- the space between the insulator tube 15 and the inner shield 21 is the shortest in the gas insulated switchgear from the current-carrying conductor, so the magnetic flux density generated by energization is high, The potential is also high. Therefore, according to the present embodiment, the measurement accuracy of the current transformer 22 and the voltage divider 23 installed in the space can be improved. In addition, the current transformer 22 and the voltage divider 23 can be reduced in size because the measurement accuracy is improved.
- the current transformer 22 and the voltage divider are connected to the gas-insulated pusher 150 (160) provided at the power inlet and the power outlet located at the end of the gas-insulated switchgear.
- the protection range of the current transformer 22 and the voltage divider 23 can be expanded. Therefore, when locating the ground fault based on the detection signals from the current transformers 22 and the voltage divider 23, whether the ground fault has occurred inside or outside the gas-insulated switchgear has been considered. The orientation can be more reliably determined, and the reliability of the gas insulated switchgear can be improved.
- the burden on maintenance and inspection workers at substations and the cost of maintenance and inspections can be reduced.
- the maintenance and inspection worker separates the equipment side and the transmission line side and performs inspection to identify the point of the ground fault. For this reason, even though the fault was identified as a ground fault on the transmission line side despite the ground fault occurring inside the gas insulated switchgear, the maintenance staff on the transmission line side reported that the ground fault was detected on the equipment side. Inspection of transmission lines will be performed despite the occurrence, which will increase the burden on maintenance personnel and the cost of maintenance and inspection.
- whether the ground fault has occurred inside or outside the gas insulated switchgear can be more reliably located than before, and therefore, the burden on maintenance and inspection workers and the maintenance and inspection Cost can be reduced.
- the gas-insulated switchgear of the present embodiment is a switchgear in which the gas-insulated bus is composed of a three-phase package and the other portions are of a phase-separated type. .
- reference numeral 200 denotes a circuit breaker unit in which a circuit breaker 40 is housed in a tank 41 in which SF 6 gas as an insulating medium is sealed.
- the circuit breaker 40 has a pair of contacts consisting of a fixed contact and a movable contact, and cuts off an accident current by this opening operation. Operated by two.
- the tank 41 is a metal cylindrical container and is grounded.
- the disconnector 43 has a pair of contacts consisting of a fixed contact and a movable contact, and disconnects the circuit on the circuit breaker 40 side and the circuit on the bus 52 side by this opening operation. It is electrically connected to the circuit breaker 40 via a connection conductor provided on the insulating spacer 45, and is operated by an operating device (not shown).
- the tank 44 is a metal T-shaped cylindrical container that is grounded and is insulated at the part that branches off horizontally from the lower end of the peripheral wall of the tank 41.
- the anti-breaker Yuni' preparative 2 0 0 side of the disconnector Yuni' preparative 2 1 0, provided the connection Yuni' preparative 2 2 0 SF 6 gas is stored constitute the current conductor 4 6 in the tank 4 7 encapsulated I have.
- the connection unit 220 mechanically and electrically connects the disconnector unit 210 to the disconnector unit 230.
- the current-carrying conductor 46 is a rod-shaped conductor made of aluminum, and is electrically connected to the disconnector 43 via a connection conductor provided on the insulating spacer 48.
- the tank 47 is a cylindrical metal container, is grounded, and is mechanically connected to a horizontally extending portion of the tank 44 via an insulating spacer 48.
- the disconnector 49 has a pair of contacts including a fixed contact and a movable contact, and the opening operation causes the circuit on the circuit breaker 40 side and the bus.
- the circuit on the side of 55 is disconnected, electrically connected to the connection conductor 46 via the connection conductor provided on the insulating spacer 51, and operated by an operating device (not shown).
- the tank 50 is a metal L-shaped cylindrical container, is grounded, and is mechanically connected to the tank 47 via an insulating spacer 51.
- a bus unit 240 is provided in the tank 53 in which the bus 52 is accommodated in three phases for three phases.
- the bus bar 52 is arranged in the tank 53 so as to be located at each vertex of the triangular shape, and is electrically connected to the disconnecting switch 43 via the connection conductor provided in the insulating spacer 54.
- the tank 53 is a metal cylindrical container, is grounded, and is mechanically connected to a portion branched downward from the peripheral wall of the tank 44 via an insulating spacer 54.
- the bus bar 55 is arranged in the tank 56 so as to be located at each vertex of the triangular shape, and is electrically connected to the disconnector 49 via the connection conductor provided on the insulating spacer 57. I have.
- the tank 56 is a cylindrical metal container, is grounded, and is mechanically connected to a portion extending below the tank 50 via an insulating spacer 57. Both bus units have the same configuration.
- the upper end of one side of the circuit breaker Yuni' preparative 2 0 0 is provided with a disconnector Yuni' preparative 2 6 0 configured to house the new road device 5 8 into the tank 5 9 SF 6 gas is sealed .
- the disconnector 58 has a pair of contacts consisting of a fixed contact and a movable contact. The disconnecting operation disconnects the circuit on the circuit breaker 40 side from the circuit on the line side. It is electrically connected to the circuit breaker 40 via a connection conductor provided in the switch 60, and is operated by an operating device (not shown).
- the tank 59 is a metal cylindrical container, is grounded, and is mechanically connected to a portion branched in the horizontal direction from the upper end side of the peripheral wall of the tank 41 via an insulating spacer 60.
- the disconnector Yuni' preparative 2 6 anti breaker Yuni' preparative 2 0 0 side 0, connecting SF 6 gas is constituted by housing the power conductors 6 1 in encapsulated tank 6 2 Yuni' 270 is provided. You.
- the connection unit 270 mechanically and electrically connects the disconnector unit 260 to the connection unit 280.
- the current-carrying conductor 61 is a rod-shaped conductor made of aluminum, and is electrically connected to the disconnector 58 via a connection conductor provided on the insulating spacer 63.
- the tank 62 is a metal: L-shaped cylindrical container, which is grounded and mechanically connected to the tank 59 via an insulating spacer 63.
- connection Yuni' preparative 2 8 0 configured to house the power conductor 6 4 in the tank 6 5 SF 6 gas is sealed .
- the connection unit 280 is for mechanically and electrically connecting the connection unit 270 to the gas insulating pushing 310 and the connection unit 290.
- the current-carrying conductor 64 is a rod-shaped conductor made of aluminum, and is electrically connected to the current-carrying conductor 61 via a connection conductor provided on the insulating spacer 66.
- the tank 65 is a metal cylindrical container, is grounded, and is mechanically connected to the tank 62 via an insulating spacer 66.
- connection Yuni' preparative 2 7 0 side connection Yuni' Bok 2 8 0, connected SF 6 gas is constituted by housing a power conductor 6 7 a sealed entrance to tank 6 in 8 Yuni' Bok
- connection unit 290 is for mechanically and electrically connecting the connection unit 280 to the lightning arrester unit 300.
- the current-carrying conductor 67 is a rod-shaped conductor made of aluminum, and is electrically connected to the current-carrying conductor 64 via a connection conductor and a branch conductor 69 provided on the insulating spacer 70.
- the tank 68 is a metal cylindrical container, is grounded, and is mechanically connected to the tank 65 via an insulating spacer 70.
- the lightning arrester 71 is made of zinc oxide with Z ⁇ ⁇ as the main component. It is composed of a plurality of stacked elements and suppresses the overvoltage of the gas insulated switchgear, and is electrically connected to the current-carrying conductor 67 through the connection conductor provided on the insulating spacer 73. ing.
- the tank 72 is a metal container, is grounded, and is mechanically connected to the tank 68 via an insulating spacer 73.
- the anti-connection Yunitto 2 7 0 side connection Yuni' DOO 2 8 0 houses the power conductors 6 4 SF 6 gas is drawn continuously from the connecting Yuni' preparative 2 8 0 a sealed entry has been porcelain bushing 1 5
- the configured gas insulating bushing 310 is provided. This constitutes the power outlet of the gas insulated switchgear, that is, the power outlet terminal.
- the configuration of the gas insulating pusher 310 of the present embodiment is the same as the configuration of the gas insulating pusher of the first embodiment described above. Therefore, a detailed description of the configuration of the gas insulating pushing 310 is omitted.
- the gas-insulated switchgear installed on the high-pressure side is not shown, but the gas-insulated switchgear is also provided with a gas-insulated bushing at the power inlet.
- the gas insulating bushing has the same configuration as the gas insulating bushing of the first embodiment described above, and constitutes a power lead-in terminal.
- the ground fault point was located by detecting the detection signal from the gas insulated bushing installed in the gas insulated switchgear on the high pressure side and the detection signal from the gas insulated bushing installed in the gas insulated switchgear on the low pressure side. This is performed based on the detection signal.
- gas ⁇ Only the bushing configuration is shown, and the overall configuration of the gas insulated switchgear is not shown.
- the gas-insulated pusher of this embodiment includes the gas-insulated switchgear of the first embodiment and the second embodiment described above, and includes all gas-insulated switchgear having a gas-insulated bushing at the power inlet or the power outlet. Applicable to equipment.
- the flange portion of the tank 75 is formed large on the outer peripheral side, and a metal (aluminum) annular container 77 is provided thereon.
- the current transformer 22 is housed inside the container 77.
- the container 77 is installed so as to surround the periphery of the lower end side of the insulator tube 15, is grounded, and can reduce the electric field similarly to the external shield. Further, in this embodiment, the internal shield is omitted, and the electric field at the lower end side of the insulator tube 15 is alleviated only by the container 77.
- the flange member 76 fixed to the lower end of the insulator 15 is provided with a signal extraction portion as in the previous example. It has the same shape as the flange member 17 fixed to the upper end of the insulator tube 15. Other configurations are the same as those in the previous example, and description thereof will be omitted.
- the current transformer 22 is housed in the container 77 and installed on the flange of the dinnerhead 75, and the current flowing through the current-carrying conductor 74 is measured.
- the current transformer L unit configured and installed as a single unit can be omitted, and the gas insulated switchgear can be downsized.
- the transformer unit conventionally configured and installed as a single unit can be omitted.
- the size of the gas-insulated switchgear can be further reduced.
- the current transformer 22 is installed outside the insulator tube 15, so that the maintenance and inspection of the current transformer 22 and the replacement can be easily performed. The maintainability can be improved.
- the case where the current transformer 22 is housed in the container 77 has been described.
- a housing space is formed in the outer shield, and the current transformer 22 is housed in the space. Can also be.
- a fourth embodiment of the present invention will be described with reference to FIG.
- the gas-insulated bushing of this embodiment is a modification of the third embodiment, in which an internal shield 21 is provided.
- an internal shield 21 is provided.
- the container 77 is lifted upward by the gantry 78 so that the upper end of the container 77 projects upward from the upper end of the inner shield 21, and both can reduce the electric field.
- It is configured as follows. According to the present embodiment, the same effects as in the third embodiment can be obtained, and the electric field can be reduced as in the past.
- a fifth embodiment of the present invention will be described with reference to FIG.
- the gas insulated pusher of this embodiment includes the gas insulated switchgear of the first and second embodiments described above, and includes all the gas insulated switchgear provided with the gas insulated bushing at the power inlet or the power outlet. Applicable to equipment.
- a voltage divider 23 that is, a cylindrical voltage dividing electrode is provided on the inner peripheral side of the inner shield 21 via an insulating member 24.
- Electrostatic voltage is applied between the conductor 74 and the inner shield 21.
- the inner diameter of the inner shield 21 is made larger by the thickness of the voltage divider 23 and the insulating member 24.
- Other configurations are the same as those in the previous example, and description thereof will be omitted.
- the voltage divider 23 is installed on the inner peripheral side of the inner shield 21 via the insulating member 24, and the voltage of the current-carrying conductor 74 is measured.
- the transformer unit that was configured and installed as a single unit can be omitted, and the gas-insulated switchgear can be downsized.
- the current transformer unit conventionally configured and installed as a single unit can be omitted.
- the gas insulated switchgear can be further miniaturized.
- the inner diameter of the inner shield 21 is formed to be large by the thickness of the voltage divider 23 and the insulating member 24, so that the voltage divider 23 protruding from the inner peripheral side of the inner shield 21 is formed. Also, the potential distribution during energization does not significantly change due to the insulating member 24. Therefore, the dielectric strength of the gas insulating bushing is not significantly reduced due to the change in the potential distribution.
- a sixth embodiment of the present invention will be described with reference to FIG.
- the gas-insulated pushing of this embodiment is a modification of the fifth embodiment.
- a voltage divider 23 is installed on the inner peripheral side of the inner shield 21 via an insulating member 24, and the lower end portion is an inner shield. It is formed by projecting downward from the lower end of the hold 21 and bending outward in an arc shape. According to the present embodiment, the same effects as in the fifth embodiment can be obtained.
- Example 7 A seventh embodiment of the present invention will be described with reference to FIG.
- the gas-insulated bushing of this embodiment is a modification of the fifth embodiment, and has a voltage divider by providing intermediate potential electrodes 79 at predetermined intervals on the inner peripheral side of the inner shield 21.
- the intermediate potential electrode 79 has a cylindrical shape whose upper and lower ends protrude vertically from the upper and lower ends of the inner shield 21 and are bent outward in an arc shape. According to this embodiment, the same effects as in the fifth embodiment can be obtained. Note that, depending on the shape of the intermediate potential electrode 79, the potential distribution during energization can be optimized.
- FIG. 8 An eighth embodiment of the present invention will be described with reference to FIG.
- the gas insulating pushing of this embodiment is a modification of the seventh embodiment.
- a capacitor 80 is installed on the outer peripheral side of the intermediate potential electrode 79 instead of the internal shield 21, and one end of the capacitor 80 is connected to the intermediate potential. It is electrically connected to the electrode 79. The other end of the capacitor 80 is grounded. As a result, a capacitance between the intermediate potential electrode 79 and the ground can be formed. According to the present embodiment, the same effects as in the seventh embodiment can be obtained.
- a ninth embodiment of the present invention will be described with reference to FIG.
- the gas-insulated pushing of this embodiment is a modification of the first and second embodiments.
- a voltage divider 23 is installed between the insulator tube 15 and the inner shield 21 and the current transformer 22 is a tank. It is installed inside 75 and below the inner shield 21.
- the transformer unit and the transformer unit conventionally configured and installed as a single unit can be omitted, and gas insulation can be achieved.
- the switchgear can be downsized.
- Example 10 A tenth embodiment of the present invention will be described with reference to FIG.
- the gas insulating pusher of this embodiment is a modification of the first and second embodiments.
- a voltage divider 23 is installed between the insulator tube 15 and the inner shield 21, and the current transformer 22 is a tank 75. It is installed on the outer peripheral side.
- the transformer unit and the transformer unit conventionally configured and installed as a single unit can be omitted. The size of the switchgear can be reduced.
- the eleventh embodiment of the present invention will be described with reference to FIG.
- the gas insulated bushing of this embodiment is a modification of the first and second embodiments.
- a current transformer 22 is installed between the insulator tube 15 and the inner shield 21, and the voltage divider 23 is a tank 75. It is installed inside and below the internal shield 21.
- the transformer unit and the transformer unit conventionally conventionally configured and installed as a single unit can be omitted. The size of the gas insulated switchgear can be reduced.
- a 12th embodiment of the present invention will be described with reference to FIG.
- the gas insulated bushing of this embodiment is a modification of the first and second embodiments.
- the gas insulated bushing 27, the signal processor 28, and the EZO converter 29, which are installed outside the gas insulated bushing, are used.
- the current transformer 22 and the voltage divider 23 are installed in a space between the insulator tube 15 and the inner shield 21. This makes it possible to easily transmit a signal from the gas insulated bushing to the monitoring control device 30.
- the signal since the signal is transmitted by an optical signal, the signal can be measured with high accuracy without being attenuated or affected by external noise.
- a thirteenth embodiment of the present invention will be described with reference to FIG.
- the gas insulating bushing of this embodiment is a modification of the first and second embodiments.
- the case where the current transformer 22 and the voltage divider 23 are installed in the space between the insulator 15 and the inner shield 21 has been described.
- a partial discharge detector 81 that detects partial discharge in the gas insulated switchgear, an insulating gas component detector 82 that detects the components of the insulating gas, and a moisture content detector
- a moisture detector 83 to detect the pressure of the insulating gas, an insulating gas pressure detector 84 to detect the pressure of the insulating gas, and an insulating gas density detector 85 to measure the density of the insulating gas are installed.
- a detector capable of electrical output such as a temperature detector that detects the temperature of the insulating gas, can be installed.
- a new partial discharge detector 81 When detecting partial discharge in the gas insulated switchgear, a new partial discharge detector 81 may be installed, but the current transformer 22 and the voltage divider 23 may be used together. It is. As the partial discharge detector 81, use a detector with good frequency response (high frequency band from several MHz to several GHz) so as to improve the SZN ratio and measurement accuracy. Is preferred.
- the 14th embodiment of the present invention will be described with reference to FIG.
- the gas insulating bushing of this embodiment is a modified example of the 12th embodiment, in which the signal processing device 28 and the E / O converter 29 can be installed outside the gas insulating bushing. For this reason, in this embodiment, between the insulator 15 and the tank 75, A metal container 86 is provided.
- the metal container 86 is an annular member, and is disposed between the flange portion 87 fixed to the lower end portion of the insulator tube 15 and the flange portion of the tank 75, and is mechanically connected to them. . At two opposing locations on the same straight line passing through the center point of the metal container 86, a concave recessed portion 86a recessed from the outer peripheral side to the inner peripheral side is formed. A signal processor 28 and an EZO converter 29 are installed in each of the depressions 86a.
- the filter 27 is installed together with the current transformer 22 on the outer peripheral side of the inner shield 21.
- the filter 27 and the signal processing device 28 are electrically connected by a signal line that is drawn airtight from the side wall of the recess 86a.
- the case where the current transformer 22 is installed is shown.
- the case where the voltage divider or both of them are installed can be considered.
- the depressions 86a are formed in at least two places. However, more depressions may be formed, and the depressions 86a may be provided in accordance with the number of detectors provided inside the insulator tube 15. Conceivable.
- the metal container 86 having the recessed portion 86a is provided, and the signal processing device 28 and the EZ ⁇ converter 29 are installed in the recessed portion 86a. They can be easily maintained and inspected without dismantling the insulating bushings. Therefore, the maintainability of the gas insulated switchgear can be improved.
- the signal processing device 28 and the EZO converter 29 are installed in each of the depressions 86 a formed at least at two places of the metal container 86, so that one side is used for the main.
- the other side can be operated as a backup. Therefore, even if the main device fails, the measurement can be continued with the backup device. At this time, the current and voltage flowing through the current-carrying conductor 74 can be measured, and the reliability of the gas-insulated switchgear can be improved.
- the gas insulating pusher of this embodiment is different from the previous embodiments in the shape and configuration of the insulator tube.
- the porcelain tube 87 of the present embodiment is formed of an insulating member in which two types of different insulators are laminated in two layers, and has a cylindrical shape with a plurality of ridges protruding on the outer peripheral side.
- the two different types of insulators are, for example, an insulator called FRP formed by impregnating glass cloth with epoxy resin, and an insulator made of a polymer material such as silicon rubber.
- a porcelain pipe 87 is formed so as to be arranged in the porcelain.
- An inner shield 21 is provided inside the insulator 87, and a current transformer 22 for measuring a current flowing through the current-carrying conductor 74 is provided on an outer peripheral side thereof.
- a current transformer 22 for measuring a current flowing through the current-carrying conductor 74
- a voltage divider for measuring the voltage of the current-carrying conductor 74 or both may be installed.
- the detection signal from the current transformer 22 can be extracted to the outside of the gas insulated bushing by providing a flange member having a signal extraction portion.
- the current transformer 22 and / or the voltage divider is provided between the insulator 87 and the internal shield 21.
- the transformer unit and / or the transformer unit which have been configured and installed as a single unit, can be omitted, and the gas insulated switchgear can be downsized.
- the present invention which can be combined with a bushing to reduce the size of the gas insulation device or improve the reliability of the gas insulation device, can be installed in substations and switchyards with a small installation area. It can be used as a gas insulated device to expand the protection range of measuring instruments and improve reliability.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Gas-Insulated Switchgears (AREA)
Description
Claims
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2000/001199 WO2001065653A1 (en) | 2000-03-01 | 2000-03-01 | Gas insulated device and failure rating method |
| EP00906601A EP1261091A4 (en) | 2000-03-01 | 2000-03-01 | GAS INSULATED EQUIPMENT AND ERRORS EVALUATION PROCEDURES |
| US10/070,996 US6850399B1 (en) | 2000-03-01 | 2000-03-01 | Gas insulated device and failure rating method |
| TW089108296A TW471204B (en) | 2000-03-01 | 2000-05-02 | Gas insulated device and failure rating method |
| US11/033,316 US7027280B2 (en) | 2000-03-01 | 2005-01-12 | Gas insulating apparatus and method for locating fault point thereof |
| US11/033,306 US7064267B2 (en) | 2000-03-01 | 2005-01-12 | Gas insulating apparatus and method for locating fault point thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2000/001199 WO2001065653A1 (en) | 2000-03-01 | 2000-03-01 | Gas insulated device and failure rating method |
Related Child Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US10070996 A-371-Of-International | 2000-03-01 | ||
| US10/070,996 A-371-Of-International US6850399B1 (en) | 2000-03-01 | 2000-03-01 | Gas insulated device and failure rating method |
| US10/347,686 Continuation US6853528B2 (en) | 2000-03-01 | 2003-01-22 | Gas insulating apparatus and method for locating fault point thereof |
| US11/033,306 Continuation US7064267B2 (en) | 2000-03-01 | 2005-01-12 | Gas insulating apparatus and method for locating fault point thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2001065653A1 true WO2001065653A1 (en) | 2001-09-07 |
Family
ID=11735742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2000/001199 Ceased WO2001065653A1 (en) | 2000-03-01 | 2000-03-01 | Gas insulated device and failure rating method |
Country Status (4)
| Country | Link |
|---|---|
| US (2) | US6850399B1 (ja) |
| EP (1) | EP1261091A4 (ja) |
| TW (1) | TW471204B (ja) |
| WO (1) | WO2001065653A1 (ja) |
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| JP2007020301A (ja) * | 2005-07-07 | 2007-01-25 | Chugoku Electric Power Co Inc:The | ガス絶縁開閉装置の事故検出装置 |
| JP4896280B1 (ja) * | 2011-05-20 | 2012-03-14 | 三菱電機株式会社 | 計器用変圧器 |
| JP2012117985A (ja) * | 2010-12-02 | 2012-06-21 | Mitsubishi Aircraft Corp | 電流計測方法 |
| WO2012157138A1 (ja) * | 2011-05-16 | 2012-11-22 | 三菱電機株式会社 | タンク型開閉装置 |
| US9646785B2 (en) | 2012-12-12 | 2017-05-09 | Mitsubishi Electric Corporation | Vacuum monitoring device |
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| CN102331551B (zh) * | 2011-07-28 | 2014-08-27 | 中国电力科学研究院 | 一种特高压出线装置绝缘可靠性试验系统 |
| CZ23097U1 (cs) * | 2011-08-23 | 2011-12-19 | Abb Technology Ag | Kombinovaný mericí a detekcní systém |
| KR101884374B1 (ko) * | 2012-09-06 | 2018-08-31 | 현대일렉트릭앤에너지시스템(주) | 가스 절연 개폐 장치에서의 내부 아크 모니터링 디바이스 |
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| US10571510B2 (en) * | 2014-05-16 | 2020-02-25 | Prysmian S.P.A. | Partial discharge acquisition system comprising a capacitive coupling electric field sensor |
| EP2950107A1 (en) * | 2014-05-27 | 2015-12-02 | ABB Technology AG | Voltage sensor for high and medium voltage use, and a method of making the same |
| CN105449536B (zh) * | 2014-08-29 | 2018-11-13 | 西门子公司 | 高压组合电器 |
| EP3001204A1 (de) * | 2014-09-29 | 2016-03-30 | Siemens Aktiengesellschaft | Durchführung wenigstens eines elektrischen Leiters durch eine Öffnung |
| JP7003134B2 (ja) * | 2016-12-16 | 2022-01-20 | イートン インテリジェント パワー リミテッド | ブッシング等の導電性要素とコネクタケーブルとの組み合わせ |
| CN107748315B (zh) * | 2017-09-14 | 2019-09-27 | 国家电网公司 | 一种配网故障主动预警方法 |
| US11085972B2 (en) | 2018-11-27 | 2021-08-10 | X Development Llc | Ground fault detection in ungrounded power systems |
| DE102019211950B3 (de) * | 2019-08-08 | 2020-11-26 | Siemens Aktiengesellschaft | Messen einer elektrischen Spannung an einem metallgekapselten Schaltgerät |
| DE102020212350A1 (de) * | 2020-09-30 | 2022-03-31 | Siemens Energy Global GmbH & Co. KG | Gekapseltes Hochspannungsgerät und Stromwandler für das gekapselte Hochspannungsgerät |
| CN112710972A (zh) * | 2020-12-18 | 2021-04-27 | 云南电网有限责任公司丽江供电局 | Gis触头接触不良故障诊断方法、装置、系统及存储介质 |
| KR102781410B1 (ko) * | 2022-10-07 | 2025-03-14 | 주식회사 건원 | 센서 일체형 에폭시 부싱 |
| DE102023204819A1 (de) * | 2023-05-24 | 2024-11-28 | Siemens Energy Global GmbH & Co. KG | Dead-Tank-Hochspannungsleistungsschalter mit Elektrode zur Messung der Spannung an dessen Hochspannungsanschluss und Verfahren zur Spannungsmessung mit der Elektrode |
| DE102023206512A1 (de) * | 2023-07-10 | 2025-01-16 | Siemens Energy Global GmbH & Co. KG | Gehäuse für ein Hochspannungsgerät mit einem Aufnahmekanal für eine Sensoreinrichtung |
| EP4567838A1 (en) * | 2023-12-08 | 2025-06-11 | Abb Schweiz Ag | Bushing for medium or high voltage applications and method for manufacturing the bushing |
| USD1028204S1 (en) | 2023-12-13 | 2024-05-21 | Danming YANG | Fan with light |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007020301A (ja) * | 2005-07-07 | 2007-01-25 | Chugoku Electric Power Co Inc:The | ガス絶縁開閉装置の事故検出装置 |
| JP2012117985A (ja) * | 2010-12-02 | 2012-06-21 | Mitsubishi Aircraft Corp | 電流計測方法 |
| US9182447B2 (en) | 2011-05-16 | 2015-11-10 | Mitsubishi Electric Corporation | Tank-type switching device |
| WO2012157138A1 (ja) * | 2011-05-16 | 2012-11-22 | 三菱電機株式会社 | タンク型開閉装置 |
| JP5518259B2 (ja) * | 2011-05-16 | 2014-06-11 | 三菱電機株式会社 | タンク型開閉装置 |
| WO2012160625A1 (ja) * | 2011-05-20 | 2012-11-29 | 三菱電機株式会社 | 計器用変圧器 |
| JP4896280B1 (ja) * | 2011-05-20 | 2012-03-14 | 三菱電機株式会社 | 計器用変圧器 |
| US9646785B2 (en) | 2012-12-12 | 2017-05-09 | Mitsubishi Electric Corporation | Vacuum monitoring device |
| JP2022547941A (ja) * | 2019-09-13 | 2022-11-16 | シーメンス エナジー グローバル ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディートゲゼルシャフト | 電力開閉装置の内部の導体の電位を測定するための測定システム、および、これに対応する電力開閉装置 |
| JP7402973B2 (ja) | 2019-09-13 | 2023-12-21 | シーメンス エナジー グローバル ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディートゲゼルシャフト | 電力開閉装置の内部の導体の電位を測定するための測定システム、および、これに対応する電力開閉装置 |
| US11965913B2 (en) | 2019-09-13 | 2024-04-23 | Siemens Energy Global GmbH & Co. KG | Measurement arrangement for measuring a voltage potential on a conductor in a power switching device and corresponding power switching device |
| WO2025063106A1 (ja) * | 2023-09-20 | 2025-03-27 | 株式会社明電舎 | ブッシング構造および電気機器 |
| JP2025044472A (ja) * | 2023-09-20 | 2025-04-02 | 株式会社明電舎 | ブッシング構造および電気機器 |
| JP7666561B2 (ja) | 2023-09-20 | 2025-04-22 | 株式会社明電舎 | ブッシング構造および電気機器 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1261091A1 (en) | 2002-11-27 |
| EP1261091A4 (en) | 2005-03-09 |
| US6850399B1 (en) | 2005-02-01 |
| TW471204B (en) | 2002-01-01 |
| US7064267B2 (en) | 2006-06-20 |
| US20050135028A1 (en) | 2005-06-23 |
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