JP2023119252A - Instrument transformer for power supply and demand and gas insulated switchgear - Google Patents

Instrument transformer for power supply and demand and gas insulated switchgear Download PDF

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JP2023119252A
JP2023119252A JP2022022047A JP2022022047A JP2023119252A JP 2023119252 A JP2023119252 A JP 2023119252A JP 2022022047 A JP2022022047 A JP 2022022047A JP 2022022047 A JP2022022047 A JP 2022022047A JP 2023119252 A JP2023119252 A JP 2023119252A
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power supply
demand
tank
transformer
vct
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裕太 阿部
Hirota Abe
康隆 清水
Yasutaka Shimizu
堅太郎 今泉
Kentaro Imaizumi
隆 砂塚
Takashi Sunazuka
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Toshiba Corp
Toshiba Energy Systems and Solutions Corp
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Toshiba Corp
Toshiba Energy Systems and Solutions Corp
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Abstract

To provide an instrument transformer for power supply and demand and a gas-insulated switchgear that can be made compact.SOLUTION: An instrument transformer for power supply and demand has an instrument pressure transformer for power supply and demand, a plurality of current transformers for power supply and demand, and a tank unit. The tank unit accommodates a conductor extending in a first direction. The tank unit is connected to the instrument pressure transformer for power supply and demand and the plurality of current transformers for power supply and demand. At least one first pair of devices of devices included in the instrument pressure transformer for power supply and demand and the plurality of current transformers for power supply and demand is connected to one first tank included in the tank unit. The pair of first devices is arranged with at least a portion of each device overlapping each other in the first direction.SELECTED DRAWING: Figure 1

Description

本発明の実施形態は、電力需給用計器用変成器およびガス絶縁開閉装置に関する。 TECHNICAL FIELD Embodiments of the present invention relate to a power supply and demand instrument transformer and a gas insulated switchgear.

工場などの受電設備においてガス絶縁開閉装置（Gas Insulated Switchgear：ＧＩＳ）が利用されている。取引される電力量を計測するため、ガス絶縁開閉装置には電力需給用計器用変成器（Voltage and Current Transformer：ＶＣＴ）が組み込まれる。電力需給用計器用変成器は、ガス絶縁開閉装置の電圧および電流を、電力量の計測に適した電圧および電流に変成する。電力需給用計器用変成器には、小型化が求められている。 Gas insulated switchgear (GIS) is used in power receiving equipment in factories and the like. A voltage and current transformer (VCT) is incorporated in the gas insulated switchgear to measure the amount of power traded. A power supply and demand meter transformer transforms the voltage and current of a gas-insulated switchgear into voltage and current suitable for measuring electric energy. Transformers for power supply and demand meters are required to be miniaturized.

特開２００２－１０１５１０号公報Japanese Patent Application Laid-Open No. 2002-101510

本発明が解決しようとする課題は、小型化することができる電力需給用計器用変成器およびガス絶縁開閉装置を提供することである。 The problem to be solved by the present invention is to provide a power supply and demand instrument transformer and a gas insulated switchgear that can be downsized.

実施形態の電力需給用計器用変成器は、電力需給用計器用変圧器および複数の電力需給用変流器と、タンクユニットと、を持つ。タンクユニットは、第１方向に伸びる導体を収容する。タンクユニットには、電力需給用計器用変圧器および複数の電力需給用変流器が接続される。電力需給用計器用変圧器および複数の電力需給用変流器に含まれる機器のうち少なくとも一対の第１機器が、タンクユニットに含まれる１個の第１タンクに接続される。一対の第１機器は、それぞれの少なくとも一部が、相互に第１方向に重なって配置される。 A power supply and demand potential transformer of an embodiment has a power supply and demand potential transformer, a plurality of power supply and demand current transformers, and a tank unit. The tank unit accommodates conductors extending in the first direction. A power supply and demand potential transformer and a plurality of power supply and demand current transformers are connected to the tank unit. At least a pair of first devices among the devices included in the power supply and demand potential transformer and the plurality of power supply and demand current transformers are connected to one first tank included in the tank unit. At least a part of each of the pair of first devices overlaps with each other in the first direction.

第１の実施形態の電力需給用計器用変成器を含むガス絶縁開閉装置の側面図。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a gas insulated switchgear including a power supply and demand instrument transformer according to a first embodiment; 第１の実施形態の電力需給用計器用変成器の側面断面図。FIG. 2 is a side cross-sectional view of the power supply and demand instrument transformer of the first embodiment. 第１の実施形態の第１変形例の電力需給用計器用変成器の側面図。FIG. 2 is a side view of a power supply and demand instrument transformer of a first modification of the first embodiment; 第１の実施形態の第２変形例の電力需給用計器用変成器の平面図。FIG. 4 is a plan view of a power supply and demand instrument transformer of a second modification of the first embodiment; 第１の実施形態の第２変形例の電力需給用計器用変成器の側面図。The side view of the power supply and demand instrument transformer of the 2nd modification of 1st Embodiment. 第２の実施形態の電力需給用計器用変成器の側面図。The side view of the transformer for power supply and demand meters of 2nd Embodiment. 第３の実施形態の電力需給用計器用変成器の側面図。The side view of the power supply and demand instrument transformer of 3rd Embodiment. 第３の実施形態の電力需給用計器用変成器の側面断面図。FIG. 11 is a side cross-sectional view of the power supply and demand instrument transformer of the third embodiment;

以下、実施形態の電力需給用計器用変成器およびガス絶縁開閉装置を、図面を参照して説明する。
（第１の実施形態）
図１は、第１の実施形態の電力需給用計器用変成器ＶＣＴを含むガス絶縁開閉装置ＧＩＳの側面図である。図２は、第１の実施形態の電力需給用計器用変成器の側面断面図である。図１に示されるように、ガス絶縁開閉装置ＧＩＳは、ケーブルヘッドＣＨと、変圧器ジャンクションＴＲ－Ｊと、を有する。ケーブルヘッドＣＨは、外部の送電線に接続される。変圧器ジャンクションＴＲ－Ｊは、受電設備の変圧器に接続される。ガス絶縁開閉装置ＧＩＳは、ケーブルヘッドＣＨから変圧器ジャンクションＴＲ－Ｊへの回線を有する。 DESCRIPTION OF THE PREFERRED EMBODIMENTS A power supply and demand instrument transformer and a gas insulated switchgear according to embodiments will be described below with reference to the drawings.
(First embodiment)
FIG. 1 is a side view of a gas insulated switchgear GIS including a power supply and demand instrument transformer VCT of the first embodiment. FIG. 2 is a cross-sectional side view of the power supply and demand instrument transformer of the first embodiment. As shown in FIG. 1, the gas insulated switchgear GIS has a cable head CH and a transformer junction TR-J. Cable head CH is connected to an external power transmission line. The transformer junction TR-J is connected to the transformer of the receiving equipment. The gas insulated switchgear GIS has a line from the cable head CH to the transformer junction TR-J.

本願において、直交座標系のＺ方向、Ｘ方向およびＹ方向が以下のように定義される。Ｚ方向は鉛直方向であり、＋Ｚ方向は上方向である。Ｘ方向およびＹ方向は水平方向である。Ｘ方向（第１方向）は、ガス絶縁開閉装置ＧＩＳの回線が伸びる方向である。＋Ｘ方向は、ケーブルヘッドＣＨから変圧器ジャンクションＴＲ－Ｊへの方向である。＋Ｘ方向を変圧器側と呼び、－Ｘ方向を送電線側と呼ぶ場合がある。Ｙ方向は、Ｚ方向およびＸ方向に直交する方向である。 In this application, the Z direction, X direction and Y direction of the orthogonal coordinate system are defined as follows. The Z direction is the vertical direction and the +Z direction is the upward direction. The X and Y directions are horizontal. The X direction (first direction) is the direction in which the lines of the gas insulated switchgear GIS extend. The +X direction is from cable head CH to transformer junction TR-J. The +X direction is sometimes called the transformer side, and the -X direction is sometimes called the transmission line side. The Y direction is a direction perpendicular to the Z direction and the X direction.

図２に示されるように、電力需給用計器用変成器ＶＣＴを含むガス絶縁開閉装置ＧＩＳの回線は、接地されたタンクＴおよびタンクＴの内部に収容される導体１０により形成される。レイアウト効率の観点から、ガス絶縁開閉装置ＧＩＳの回線には、三相一括方式が採用される。三相一括方式の回線では、三相交流に対応する第１相１１、第２相１２および第３相１３の導体１０が、同じタンクＴの内部に収容される。タンクＴの内部には、ＳＦ６等の絶縁ガスが封入される。ガス絶縁開閉装置ＧＩＳの回線は、絶縁スペーサ３０により複数のガス区分に分離される。絶縁スペーサ３０は、導体１０を支持するとともに、タンクＴの内部を導体１０の延伸方向に仕切る。 As shown in FIG. 2, the circuit of the gas insulated switchgear GIS including the voltage distribution transformer VCT is formed by a grounded tank T and a conductor 10 housed inside the tank T. As shown in FIG. From the viewpoint of layout efficiency, a three-phase collective system is adopted for the lines of the gas-insulated switchgear GIS. In the line of the three-phase collective system, the conductors 10 of the first phase 11, the second phase 12 and the third phase 13 corresponding to the three-phase alternating current are housed inside the same tank T. The inside of the tank T is filled with an insulating gas such as SF6 . The lines of the gas insulated switchgear GIS are separated into gas sections by insulating spacers 30 . The insulating spacer 30 supports the conductor 10 and partitions the inside of the tank T in the extending direction of the conductor 10 .

図１に示されるように、ガス絶縁開閉装置ＧＩＳは、ケーブルヘッドＣＨから変圧器ジャンクションＴＲ－Ｊへの回線に沿って、避雷器ＬＡと、送電線側断路器・接地開閉器ＤＳ／ＥＳと、計器用変圧器ＶＴと、変流器ＣＴと、遮断器ＧＣＢと、電力需給用計器用変成器ＶＣＴと、変圧器側接地開閉器ＥＳと、を有する。 As shown in FIG. 1, the gas insulated switchgear GIS includes a lightning arrester LA, a transmission line side disconnector/grounding switch DS/ES, and It has a potential transformer VT, a current transformer CT, a circuit breaker GCB, a power supply and demand potential transformer VCT, and a transformer-side grounding switch ES.

送電線側断路器・接地開閉器ＤＳ／ＥＳは、回線を開閉するとともに、停止時に無電圧となる回線を接地する。計器用変圧器ＶＴは、回線の電圧を計測に適した電圧に変成する。変流器ＣＴは、回線の電流を計測に適した電流に変成する。計器用変圧器ＶＴを利用して計測される電圧および変流器ＣＴを利用して計測される電流は、ガス絶縁開閉装置ＧＩＳの制御に利用される。遮断器ＧＣＢは、ガス絶縁開閉装置ＧＩＳの回線を断接する。変圧器側接地開閉器ＥＳは、停止時に無電圧となる回線を接地する。 The transmission line side disconnector/grounding switch DS/ES opens and closes the line, and grounds the line that becomes no voltage when stopped. A potential transformer VT transforms the line voltage into a voltage suitable for measurement. The current transformer CT transforms the line current into a current suitable for measurement. The voltage measured using the voltage transformer VT and the current measured using the current transformer CT are used to control the gas insulated switchgear GIS. The circuit breaker GCB disconnects the line of the gas insulated switchgear GIS. The transformer-side grounding switch ES grounds the line that has no voltage when stopped.

電力需給用計器用変成器ＶＣＴは、取引される電力量を計測するため、ガス絶縁開閉装置ＧＩＳの回線の電圧および電流を、電力量の計測に適した電圧および電流に変成する。例えば、電力需給用計器用変成器ＶＣＴは電力会社の所有物であり、電力需給用計器用変成器ＶＣＴを除くガス絶縁開閉装置ＧＩＳは電力需要家の所有物である。電力需給用計器用変成器ＶＣＴは、ガス絶縁開閉装置ＧＩＳより交換サイクルが短い。電力需給用計器用変成器ＶＣＴは、容易に交換できるようにまとまった状態で、ガス絶縁開閉装置ＧＩＳに組み込まれる。 The power supply and demand meter transformer VCT transforms the voltage and current of the line of the gas insulated switchgear GIS into voltage and current suitable for measuring the amount of power to measure the amount of power to be traded. For example, the voltage distribution transformer VCT is owned by the electric power company, and the gas insulated switchgear GIS other than the voltage distribution transformer VCT is owned by the electric power consumer. The power supply and demand instrument transformer VCT has a shorter replacement cycle than the gas insulated switchgear GIS. The power supply and demand instrument transformer VCT is assembled into the gas insulated switchgear GIS so that it can be easily replaced.

図２に示されるように、電力需給用計器用変成器ＶＣＴは、タンクユニット２０と、電力需給用計器用変圧器ＶＴ（ＶＣＴ）と、複数の電力需給用変流器ＣＴ（ＶＣＴ）と、を有する。 As shown in FIG. 2, the electric power supply and demand voltage transformer VCT includes a tank unit 20, an electric power supply and demand voltage transformer VT (VCT), a plurality of electric power supply and demand current transformers CT (VCT), have

タンクユニット２０は、Ｘ方向に伸びる導体１０を収容する。タンクユニット２０のＸ方向の両端部には、絶縁スペーサ３０が配置される。タンクユニット２０の内部には、ＳＦ６等の絶縁ガスが封入される。タンクユニット２０には、電力需給用計器用変圧器ＶＴ（ＶＣＴ）および複数の電力需給用変流器ＣＴ（ＶＣＴ）が接続される。
タンクユニット２０は、第１タンク２１を有する。第１タンク２１は、円筒状に形成される。第１タンク２１の中心軸は、Ｘ方向と平行である。 The tank unit 20 accommodates the conductor 10 extending in the X direction. Insulating spacers 30 are arranged at both ends of the tank unit 20 in the X direction. The inside of the tank unit 20 is filled with an insulating gas such as SF6 . The tank unit 20 is connected to a power supply and demand potential transformer VT (VCT) and a plurality of power supply and demand current transformers CT (VCT).
The tank unit 20 has a first tank 21 . The first tank 21 is formed in a cylindrical shape. A central axis of the first tank 21 is parallel to the X direction.

電力需給用計器用変圧器ＶＴ（ＶＣＴ）および複数の電力需給用変流器ＣＴ（ＶＣＴ）は、ＶＣＴタンク２５に覆われる。ＶＣＴタンク２５の内部には、ＳＦ６等の絶縁ガスが封入される。電力需給用計器用変圧器ＶＴ（ＶＣＴ）および複数の電力需給用変流器ＣＴ（ＶＣＴ）は、絶縁スペーサ３５を介して、タンクユニット２０から独立したガス区分に分離される。 A power supply and demand potential transformer VT (VCT) and a plurality of power supply and demand current transformers CT (VCT) are covered by a VCT tank 25 . The inside of the VCT tank 25 is filled with an insulating gas such as SF6 . A voltage transformer VT (VCT) and a plurality of voltage transformers CT (VCT) are separated from the tank unit 20 by insulating spacers 35 into independent gas compartments.

電力需給用計器用変圧器ＶＴ（ＶＣＴ）は、ガス絶縁開閉装置ＧＩＳの回線の電圧を、計測に適した電圧に変成する。電力需給用計器用変圧器ＶＴ（ＶＣＴ）は、導体１０の第１相１１、第２相および第３相１３に接続される。電力需給用計器用変圧器ＶＴ（ＶＣＴ）は、第１相１１と第２相１２との間の電圧を変成するとともに、第１相１１と第３相１３との間の電圧を変成する。 A power supply and demand potential transformer VT (VCT) transforms the voltage of the line of the gas insulated switchgear GIS into a voltage suitable for measurement. A voltage transformer VT (VCT) is connected to the first phase 11 , the second phase and the third phase 13 of the conductor 10 . A power supply and demand potential transformer VT (VCT) transforms the voltage between the first phase 11 and the second phase 12 and transforms the voltage between the first phase 11 and the third phase 13 .

複数の電力需給用変流器ＣＴ（ＶＣＴ）は、ガス絶縁開閉装置ＧＩＳの回線の電流を、計測に適した電流に変成する。複数の電力需給用変流器ＣＴ（ＶＣＴ）は、第２電力需給用変流器ＣＴ（ＶＣＴ）２と、第３電力需給用変流器ＣＴ（ＶＣＴ）３と、を有する。第２電力需給用変流器ＣＴ（ＶＣＴ）２は、導体１０の第２相１２に接続され、第２相１２の電流を変成する。第３電力需給用変流器ＣＴ（ＶＣＴ）３は、導体１０の第３相１３に接続され、第３相１３の電流を変成する。 A plurality of power supply and demand current transformers CT (VCT) transform the current of the line of the gas insulated switchgear GIS into a current suitable for measurement. The plurality of power supply and demand current transformers CT (VCT) has a second power supply and demand current transformer CT (VCT) 2 and a third power supply and demand current transformer CT (VCT) 3 . A second current transformer CT (VCT) 2 is connected to the second phase 12 of the conductor 10 and transforms the current in the second phase 12 . A third current transformer CT (VCT) 3 is connected to the third phase 13 of the conductor 10 and transforms the current of the third phase 13 .

導体１０の第３相１３に対する電力需給用計器用変圧器ＶＴ（ＶＣＴ）の接続点Ｖ３は、第３相１３に対する第３電力需給用変流器ＣＴ（ＶＣＴ）３の接続点Ｃ３より、－Ｘ方向に配置される。導体１０の第２相１２に対する電力需給用計器用変圧器ＶＴ（ＶＣＴ）の接続点Ｖ２は、第２相１２に対する第２電力需給用変流器ＣＴ（ＶＣＴ）２の接続点Ｃ２より、－Ｘ方向に配置される。すなわち、導体１０に対する電力需給用計器用変圧器ＶＴ（ＶＣＴ）の接続点Ｖ２，Ｖ３は、導体１０に対する複数の電力需給用変流器ＣＴ（ＶＣＴ）の接続点Ｃ２，Ｃ３より、－Ｘ方向（Ｘ方向の一方側）に配置される。導体１０の送電線側（上流側）に電力需給用計器用変圧器ＶＴ（ＶＣＴ）が接続され、変圧器側（下流側）に複数の電力需給用変流器ＣＴ（ＶＣＴ）が接続される。複数の電力需給用変流器ＣＴ（ＶＣＴ）の間に電力需給用計器用変圧器ＶＴ（ＶＣＴ）が接続されないので、電力需給用計器用変成器ＶＣＴの精度が向上する。 The connection point V3 of the power supply and demand voltage transformer VT (VCT) for the third phase 13 of the conductor 10 is connected to the third power supply and demand current transformer CT (VCT) 3 for the third phase 13 from the connection point C3 of - Arranged in the X direction. The connection point V2 of the power supply and demand potential transformer VT (VCT) to the second phase 12 of the conductor 10 is connected from the connection point C2 of the second power supply and demand current transformer CT (VCT) 2 to the second phase 12 by - Arranged in the X direction. That is, the connection points V2 and V3 of the power supply and demand potential transformers VT (VCT) with respect to the conductor 10 are connected to the conductor 10 from the connection points C2 and C3 of the plurality of power supply and demand current transformers CT (VCT) in the -X direction. (one side in the X direction). A power supply and demand potential transformer VT (VCT) is connected to the transmission line side (upstream side) of the conductor 10, and a plurality of power supply and demand current transformers CT (VCT) are connected to the transformer side (downstream side). . Since the power supply and demand potential transformer VT (VCT) is not connected between a plurality of power supply and demand current transformers CT (VCT), the accuracy of the power supply and demand potential transformer VCT is improved.

電力需給用計器用変圧器ＶＴ（ＶＣＴ）および複数の電力需給用変流器ＣＴ（ＶＣＴ）に含まれる機器のうち、電力需給用計器用変圧器ＶＴ（ＶＣＴ）および第３電力需給用変流器ＣＴ（ＶＣＴ）３が、一対の第１機器４１の一例である。少なくとも一対の第１機器４１が、１個の第１タンク２１に接続される。電力需給用計器用変圧器ＶＴ（ＶＣＴ）および複数の電力需給用変流器ＣＴ（ＶＣＴ）に含まれる機器のうち、一対の第１機器４１とは異なる第２電力需給用変流器ＣＴ（ＶＣＴ）２が、第２機器４２の一例である。第１の実施形態では、一対の第１機器４１に加えて第２機器４２も、第１タンク２１に接続される。すなわち、電力需給用計器用変圧器ＶＴ（ＶＣＴ）および複数の電力需給用変流器ＣＴ（ＶＣＴ）に含まれる全ての機器が、第１タンク２１に接続される。 Potential transformer VT (VCT) for power supply and demand and a third current transformer for power supply and demand among devices included in the voltage transformer VT (VCT) for power supply and demand and a plurality of current transformers CT (VCT) for power supply and demand The device CT (VCT) 3 is an example of the pair of first devices 41 . At least a pair of first devices 41 are connected to one first tank 21 . A second power supply and demand current transformer CT ( VCT) 2 is an example of the second device 42 . In the first embodiment, in addition to the pair of first devices 41 , the second device 42 is also connected to the first tank 21 . That is, all devices included in the power supply and demand potential transformer VT (VCT) and the plurality of power supply and demand current transformers CT (VCT) are connected to the first tank 21 .

少なくとも一対の第１機器４１が、１個の第１タンク２１に接続されることにより、電力需給用計器用変成器ＶＣＴが小型化される。三相一括方式の回線から複数の単相方式の回線を分岐させて、それぞれのタンクに複数の電力需給用変流器ＣＴ（ＶＣＴ）が接続される場合がある。この場合に比べて、第１の実施形態では、電力需給用計器用変成器ＶＣＴの占有スペースが小さくなる。 By connecting at least a pair of first devices 41 to one first tank 21, the power supply and demand meter transformer VCT is miniaturized. A plurality of single-phase lines may be branched from a three-phase collective line, and a plurality of power supply and demand current transformers CT (VCT) may be connected to the respective tanks. Compared to this case, in the first embodiment, the space occupied by the power supply and demand instrument transformer VCT is reduced.

Ｘ方向から見て、一対の第１機器４１は、相互に異なる位置にある。一対の第１機器４１は、第１タンク２１を挟んで相互に反対側に配置される。Ｘ方向から見て、一対の第１機器４１は、第１タンク２１の周方向に１８０°離れて配置される。これにより、電力需給用計器用変成器ＶＣＴが、ＹＺ方向に小型化される。一対の第１機器４１は、１８０°未満の角度で離れて配置されてもよい。 When viewed from the X direction, the pair of first devices 41 are located at mutually different positions. The pair of first devices 41 are arranged on opposite sides of each other with the first tank 21 interposed therebetween. The pair of first devices 41 are arranged 180° apart in the circumferential direction of the first tank 21 when viewed from the X direction. As a result, the power supply and demand instrument transformer VCT is miniaturized in the YZ direction. The pair of first devices 41 may be spaced apart by an angle of less than 180°.

一対の第１機器４１は、それぞれの少なくとも一部が、相互にＸ方向に重なって配置される。図１および図２の例では、電力需給用計器用変圧器ＶＴ（ＶＣＴ）の一部と、第３電力需給用変流器ＣＴ（ＶＣＴ）３の略全部とが、相互にＸ方向に重なって配置される。
これにより、電力需給用計器用変成器ＶＣＴがＸ方向に小型化される。電力需給用計器用変圧器ＶＴ（ＶＣＴ）および第３電力需給用変流器ＣＴ（ＶＣＴ）３がＸ方向に並んで配置される場合と比べて、電力需給用計器用変成器ＶＣＴのＸ方向の長さが短くなる。 At least a part of each of the pair of first devices 41 overlaps with each other in the X direction. In the example of FIGS. 1 and 2, a part of the power supply and demand potential transformer VT (VCT) and substantially all of the third power supply and demand current transformer CT (VCT) 3 overlap each other in the X direction. are placed.
As a result, the power supply and demand instrument transformer VCT is miniaturized in the X direction. Compared to the case where the power supply and demand potential transformer VT (VCT) and the third power supply and demand current transformer CT (VCT) 3 are arranged side by side in the X direction, the X direction of the power supply and demand potential transformer VCT length becomes shorter.

一対の第１機器４１のうち、電力需給用計器用変圧器ＶＴ（ＶＣＴ）は、第１タンク２１の＋Ｚ方向（上方）に配置される。一対の第１機器４１のうち、第３電力需給用変流器ＣＴ（ＶＣＴ）３は、第１タンク２１の－Ｚ方向（下方）に配置される。第２機器４２である第２電力需給用変流器ＣＴ（ＶＣＴ）２も、第１タンク２１の－Ｚ方向（下方）に配置される。第２電力需給用変流器ＣＴ（ＶＣＴ）２は、第３電力需給用変流器ＣＴ（ＶＣＴ）３の＋Ｘ方向に並んで配置される。 Among the pair of first devices 41 , the power supply and demand potential transformer VT (VCT) is arranged in the +Z direction (above) the first tank 21 . Of the pair of first devices 41 , the third power supply and demand current transformer CT (VCT) 3 is arranged in the −Z direction (downward) of the first tank 21 . A second power supply and demand current transformer CT (VCT) 2 , which is the second device 42 , is also arranged in the −Z direction (downward) of the first tank 21 . The second power supply and demand current transformer CT (VCT) 2 is arranged side by side in the +X direction of the third power supply and demand current transformer CT (VCT) 3 .

Ｘ方向から見て、第２電力需給用変流器ＣＴ（ＶＣＴ）２と、一対の第１機器４１とが、異なる位置にあってもよい。この場合に、第２電力需給用変流器ＣＴ（ＶＣＴ）２の少なくとも一部と、一対の第１機器４１の少なくとも一部とが、相互にＸ方向に重なって配置されることが望ましい。これにより、電力需給用計器用変成器ＶＣＴがＸ方向に小型化される。 The second power supply and demand current transformer CT (VCT) 2 and the pair of first devices 41 may be located at different positions when viewed from the X direction. In this case, it is desirable that at least part of the second power supply and demand current transformer CT (VCT) 2 and at least part of the pair of first devices 41 overlap each other in the X direction. As a result, the power supply and demand instrument transformer VCT is miniaturized in the X direction.

図３は、第１の実施形態の第１変形例の電力需給用計器用変成器ＶＣＴの側面図である。第１変形例において、一対の第１機器４１のうち電力需給用計器用変圧器ＶＴ（ＶＣＴ）は、第１タンク２１の－Ｚ方向（下方）に配置される。一対の第１機器４１のうち第３電力需給用変流器ＣＴ（ＶＣＴ）３は、第１タンク２１の＋Ｚ方向（上方）に配置される。第２機器４２である第２電力需給用変流器ＣＴ（ＶＣＴ）２も、第１タンク２１の＋Ｚ方向（上方）に配置される。第２電力需給用変流器ＣＴ（ＶＣＴ）２は、第３電力需給用変流器ＣＴ（ＶＣＴ）３の＋Ｘ方向に並んで配置される。 FIG. 3 is a side view of the power supply and demand instrument transformer VCT of the first modification of the first embodiment. In the first modification, the power supply and demand potential transformer VT (VCT) of the pair of first devices 41 is arranged in the −Z direction (downward) of the first tank 21 . Of the pair of first devices 41 , the third power supply and demand current transformer CT (VCT) 3 is arranged in the +Z direction (above) of the first tank 21 . A second power supply and demand current transformer CT (VCT) 2 as a second device 42 is also arranged in the +Z direction (above) of the first tank 21 . The second power supply and demand current transformer CT (VCT) 2 is arranged side by side in the +X direction of the third power supply and demand current transformer CT (VCT) 3 .

第１の実施形態およびその第１変形例において、一対の第１機器４１の一方は第１タンク２１の上方に配置され、一対の第１機器４１の他方は第１タンク２１の下方に配置される。すなわち、一対の第１機器４１は、第１タンク２１を挟んで相互にＺ方向（上下方向）の反対側に配置される。これにより、電力需給用計器用変成器ＶＣＴがＹ方向に小型化される。電力需給用計器用変成器ＶＣＴの占有面積が小さくなる。 In the first embodiment and its first modification, one of the pair of first devices 41 is arranged above the first tank 21 and the other of the pair of first devices 41 is arranged below the first tank 21. be. That is, the pair of first devices 41 are arranged on opposite sides in the Z direction (vertical direction) with the first tank 21 interposed therebetween. As a result, the power supply and demand instrument transformer VCT is miniaturized in the Y direction. The area occupied by the power supply and demand instrument transformer VCT is reduced.

図４は、第１の実施形態の第２変形例の電力需給用計器用変成器ＶＣＴの平面図であり、図５は側面図である。第２変形例において、一対の第１機器４１のうち電力需給用計器用変圧器ＶＴ（ＶＣＴ）は、第１タンク２１の＋Ｙ方向（水平方向の一方側）に配置される。一対の第１機器４１のうち第３電力需給用変流器ＣＴ（ＶＣＴ）３は、第１タンク２１の－Ｙ方向（水平方向の他方側）に配置される。第２機器４２である第２電力需給用変流器ＣＴ（ＶＣＴ）２も、第１タンク２１の－Ｙ方向に配置される。第２電力需給用変流器ＣＴ（ＶＣＴ）２は、第３電力需給用変流器ＣＴ（ＶＣＴ）３の＋Ｘ方向に並んで配置される。 FIG. 4 is a plan view of a power supply and demand instrument transformer VCT of a second modification of the first embodiment, and FIG. 5 is a side view thereof. In the second modification, the power supply and demand potential transformer VT (VCT) of the pair of first devices 41 is arranged in the +Y direction (one side in the horizontal direction) of the first tank 21 . Of the pair of first devices 41, the third power supply and demand current transformer CT (VCT) 3 is arranged in the -Y direction (the other side in the horizontal direction) of the first tank . A second power supply and demand current transformer CT (VCT) 2 , which is the second device 42 , is also arranged in the −Y direction of the first tank 21 . The second power supply and demand current transformer CT (VCT) 2 is arranged side by side in the +X direction of the third power supply and demand current transformer CT (VCT) 3 .

第２変形例において、一対の第１機器４１は、第１タンク２１を挟んで相互にＹ方向の反対側に配置される。これにより、電力需給用計器用変成器ＶＣＴがＺ方向（上下方向）に小型化される。 In the second modification, the pair of first devices 41 are arranged on opposite sides in the Y direction with the first tank 21 interposed therebetween. As a result, the power supply and demand instrument transformer VCT is downsized in the Z direction (vertical direction).

実施形態のガス絶縁開閉装置ＧＩＳは、小型化された電力需給用計器用変成器ＶＣＴを有する。これにより、ガス絶縁開閉装置ＧＩＳが小型化される。 The gas-insulated switchgear GIS of the embodiment has a miniaturized power supply and demand instrument transformer VCT. As a result, the gas-insulated switchgear GIS is miniaturized.

（第２の実施形態）
図６は、第２の実施形態の電力需給用計器用変成器ＶＣＴの側面図である。第２の実施形態の電力需給用計器用変成器ＶＣＴは、第３機器４３が第１タンク２１に接続される点で、第１の実施形態とは異なる。第１の実施形態と同様である部分における第２の実施形態の説明は省略される場合がある。 (Second embodiment)
FIG. 6 is a side view of the power supply and demand instrument transformer VCT of the second embodiment. The power supply and demand instrument transformer VCT of the second embodiment differs from that of the first embodiment in that the third device 43 is connected to the first tank 21 . Descriptions of the second embodiment that are the same as those of the first embodiment may be omitted.

第３機器４３は、ガス絶縁開閉装置ＧＩＳを構成する機器である。例えば、第３機器４３は、計器用変圧器ＶＴ、接地開閉器ＥＳまたは検電装置などである。検電装置は、導体１０の電圧の有無を検出する。第３機器４３は、第１電力需給用変流器ＣＴ（ＶＣＴ）１でもよい。第１電力需給用変流器ＣＴ（ＶＣＴ）１は、導体１０の第１相１１（図２参照）に接続され、第１相１１の電流を変成する。 The third device 43 is a device that constitutes the gas-insulated switchgear GIS. For example, the third device 43 is a voltage transformer VT, an earthing switch ES, or a voltage detection device. The voltage detection device detects the presence or absence of voltage on the conductor 10 . The third device 43 may be the first power supply and demand current transformer CT (VCT) 1 . A first current transformer CT (VCT) 1 is connected to the first phase 11 of the conductor 10 (see FIG. 2) and transforms the current of the first phase 11 .

第３機器４３は、第１タンク２１に接続される。第３機器４３は、第１タンク２１の＋Ｚ方向に配置される。第３機器４３は、電力需給用計器用変圧器ＶＴ（ＶＣＴ）の＋Ｘ方向のスペースに、電力需給用計器用変圧器ＶＴ（ＶＣＴ）と並んで配置される。第２機器４２である第２電力需給用変流器ＣＴ（ＶＣＴ）２と、第３機器４３とが、第１タンク２１を挟んで相互に反対側に配置される。第２機器４２の少なくとも一部と、第３機器４３の少なくとも一部とが、相互にＸ方向に重なって配置される。図６の例では、第２電力需給用変流器ＣＴ（ＶＣＴ）２の略全部と、第３機器４３の一部とが、相互にＸ方向に重なって配置される。 A third device 43 is connected to the first tank 21 . The third device 43 is arranged in the +Z direction of the first tank 21 . The third device 43 is arranged side by side with the power supply and demand potential transformer VT (VCT) in the +X direction space of the power supply and demand potential transformer VT (VCT). The second power supply and demand current transformer CT (VCT) 2 as the second device 42 and the third device 43 are arranged opposite to each other with the first tank 21 interposed therebetween. At least part of the second device 42 and at least part of the third device 43 are arranged to overlap each other in the X direction. In the example of FIG. 6, substantially all of the second power supply and demand current transformer CT (VCT) 2 and part of the third device 43 are arranged to overlap each other in the X direction.

ガス絶縁開閉装置ＧＩＳの構成機器である第３機器４３が、電力需給用計器用変成器ＶＣＴの空いたスペースに配置され、第１タンク２１に接続される。第２機器４２と第３機器４３とが、第１タンク２１を挟んで相互に反対側に配置される。第２機器４２の少なくとも一部と、第３機器４３の少なくとも一部とが、相互にＸ方向に重なって配置される。これにより、ガス絶縁開閉装置ＧＩＳが小型化される。 A third device 43 , which is a component of the gas insulated switchgear GIS, is arranged in an empty space of the power supply and demand instrument transformer VCT and connected to the first tank 21 . The second device 42 and the third device 43 are arranged opposite to each other with the first tank 21 interposed therebetween. At least part of the second device 42 and at least part of the third device 43 are arranged to overlap each other in the X direction. As a result, the gas-insulated switchgear GIS is miniaturized.

（第３の実施形態）
図７は、第３の実施形態の電力需給用計器用変成器ＶＣＴの側面図であり、図８は側面断面図である。第３の実施形態の電力需給用計器用変成器ＶＣＴは、第２機器４２および第３機器４３が第２タンク２２に接続される点で、第２の実施形態とは異なる。第２の実施形態と同様である部分における第３の実施形態の説明は省略される場合がある。 (Third Embodiment)
FIG. 7 is a side view of the power supply and demand instrument transformer VCT of the third embodiment, and FIG. 8 is a side cross-sectional view. The power supply and demand instrument transformer VCT of the third embodiment differs from the second embodiment in that the second device 42 and the third device 43 are connected to the second tank 22 . Descriptions of the third embodiment that are the same as those of the second embodiment may be omitted.

タンクユニット２０は、第１タンク２１に加えて第２タンク２２を有する。第２タンク２２は、円筒状に形成される。第２タンク２２の中心軸は、Ｘ方向と平行である。第２タンク２２は、第１タンク２１の＋Ｘ方向に配置される。第３の実施形態の第１タンク２１のＸ方向の長さは、第２の実施形態の第１タンク２１のＸ方向の長さの半分程度である。第２タンク２２のＸ方向の長さは、第１タンク２１のＸ方向の長さと同程度である。第３の実施形態の第１タンク２１および第２タンク２２のＸ方向の長さの合計は、第２の実施形態の第１タンク２１のＸ方向の長さと同程度である。
一対の第１機器４１は、第１タンク２１に接続される。第２機器４２および第３機器４３は、第２タンク２２に接続される。 The tank unit 20 has a second tank 22 in addition to the first tank 21 . The second tank 22 is formed in a cylindrical shape. The central axis of the second tank 22 is parallel to the X direction. The second tank 22 is arranged in the +X direction of the first tank 21 . The X-direction length of the first tank 21 of the third embodiment is approximately half the X-direction length of the first tank 21 of the second embodiment. The length of the second tank 22 in the X direction is approximately the same as the length of the first tank 21 in the X direction. The total length in the X direction of the first tank 21 and the second tank 22 in the third embodiment is approximately the same as the length in the X direction of the first tank 21 in the second embodiment.
A pair of first devices 41 are connected to the first tank 21 . A second device 42 and a third device 43 are connected to the second tank 22 .

第１タンク２１と第２タンク２２との間には、絶縁スペーサ３３が配置される。第２タンク２２は、絶縁スペーサ３３を介して第１タンク２１のＸ方向の隣りに配置される。第１タンク２１および第２タンク２２は、絶縁スペーサ３３により異なるガス区分に分離される。絶縁スペーサ３３は、樹脂等の絶縁材料により形成される。図８に示されるように、絶縁スペーサ３３は、導体１０を支持する。導体１０は、電力需給用計器用変成器ＶＣＴのＸ方向の両端部に配置される一対の絶縁スペーサ３０に加えて、Ｘ方向の中央部に配置される絶縁スペーサ３３により支持される。 An insulating spacer 33 is arranged between the first tank 21 and the second tank 22 . The second tank 22 is arranged next to the first tank 21 in the X direction with an insulating spacer 33 interposed therebetween. The first tank 21 and the second tank 22 are separated into different gas compartments by insulating spacers 33 . The insulating spacer 33 is made of an insulating material such as resin. As shown in FIG. 8, insulating spacers 33 support conductors 10 . The conductor 10 is supported by a pair of insulating spacers 30 arranged at both ends in the X direction of the power supply and demand instrument transformer VCT, and also by an insulating spacer 33 arranged in the center in the X direction.

ガス絶縁開閉装置ＧＩＳに地絡事故が発生すると、導体１０に大電流が流れる。導体１０の各相１１－１３の間に電磁力が作用する。電磁力は、導体１０が伸びるＸ方向に直交するＹＺ方向に作用する。これにより、Ｘ方向の両端部で導体１０を支持する一対の絶縁スペーサ３０が破損する可能性がある。電力需給用計器用変成器ＶＣＴには、大きな事故電流への耐性（短時間耐電流仕様）が求められる。中央部に絶縁スペーサ３３が追加されるので、両端部の絶縁スペーサ３０に作用する力が分散される。これにより、電力需給用計器用変成器ＶＣＴの耐性が向上する。 When a ground fault occurs in the gas-insulated switchgear GIS, a large current flows through the conductor 10 . An electromagnetic force acts between each phase 11-13 of the conductor 10; The electromagnetic force acts in the YZ directions perpendicular to the X direction in which the conductor 10 extends. This may damage the pair of insulating spacers 30 that support the conductor 10 at both ends in the X direction. Power supply and demand instrument transformers VCT are required to withstand large fault currents (short-time withstand current specifications). Since the insulating spacer 33 is added at the center, the force acting on the insulating spacers 30 at both ends is dispersed. This improves the resistance of the power supply and demand instrument transformer VCT.

実施形態では、一例として、電力需給用計器用変圧器ＶＴ（ＶＣＴ）および第３電力需給用変流器ＣＴ（ＶＣＴ）３が一対の第１機器４１であり、第２電力需給用変流器ＣＴ（ＶＣＴ）２が第２機器４２である。これに対して、電力需給用計器用変圧器ＶＴ（ＶＣＴ）および第２電力需給用変流器ＣＴ（ＶＣＴ）２が一対の第１機器４１であり、第３電力需給用変流器ＣＴ（ＶＣＴ）３が第２機器でもよい。また、第２電力需給用変流器ＣＴ（ＶＣＴ）２および第３電力需給用変流器ＣＴ（ＶＣＴ）３が一対の第１機器４１であり、電力需給用計器用変圧器ＶＴ（ＶＣＴ）が第２機器４２でもよい。
実施形態では、一対の第１機器４１の＋Ｘ方向に第２機器４２が配置される。これに対して、一対の第１機器４１の－Ｘ方向に第２機器４２が配置されてもよい。 In the embodiment, as an example, the power supply and demand voltage transformer VT (VCT) and the third power supply and demand current transformer CT (VCT) 3 are a pair of first devices 41, and the second power supply and demand current transformer CT (VCT) 2 is the second device 42 . On the other hand, the power supply and demand voltage transformer VT (VCT) and the second power supply and demand current transformer CT (VCT) 2 are a pair of first devices 41, and the third power supply and demand current transformer CT ( VCT) 3 may be the second device. Further, the second power supply and demand current transformer CT (VCT) 2 and the third power supply and demand current transformer CT (VCT) 3 are a pair of first devices 41, and the power supply and demand potential transformer VT (VCT). may be the second device 42 .
In the embodiment, the second device 42 is arranged in the +X direction of the pair of first devices 41 . On the other hand, the second device 42 may be arranged in the −X direction of the pair of first devices 41 .

以上説明した少なくともひとつの実施形態によれば、一対の第１機器４１のそれぞれの少なくとも一部が、相互にＸ方向に重なって配置される。これにより、電力需給用計器用変成器ＶＣＴを小型化することができる。 According to at least one embodiment described above, at least a portion of each of the pair of first devices 41 are arranged to overlap each other in the X direction. As a result, the power supply and demand instrument transformer VCT can be miniaturized.

本発明のいくつかの実施形態を説明したが、これらの実施形態は、例として提示したものであり、発明の範囲を限定することは意図していない。これら実施形態は、その他の様々な形態で実施されることが可能であり、発明の要旨を逸脱しない範囲で、種々の省略、置き換え、変更を行うことができる。これら実施形態やその変形は、発明の範囲や要旨に含まれると同様に、特許請求の範囲に記載された発明とその均等の範囲に含まれるものである。 While several embodiments of the invention have been described, these embodiments have been presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, as well as the scope of the invention described in the claims and equivalents thereof.

ＥＳ…接地開閉器、ＧＩＳ…ガス絶縁開閉装置、ＣＴ（ＶＣＴ）…電力需給用変流器、Ｃ２，Ｃ３…接続点、ＶＣＴ…電力需給用計器用変成器、ＶＴ…計器用変圧器、ＶＴ（ＶＣＴ）…電力需給用計器用変圧器、Ｖ２，Ｖ３…接続点、１０…導体、２０…タンクユニット、２１…第１タンク、２２…第２タンク、３３…絶縁スペーサ、４１…第１機器、４２…第２機器、４３…第３機器。 ES...Earth switch, GIS...Gas insulated switchgear, CT(VCT)...Power supply and demand current transformer, C2, C3...Connection point, VCT...Power supply and demand instrument transformer, VT...Voltage transformer, VT (VCT)... Potential transformer for power supply and demand, V2, V3... Connection point, 10... Conductor, 20... Tank unit, 21... First tank, 22... Second tank, 33... Insulating spacer, 41... First device , 42 . . . second equipment, 43 .. third equipment.

Claims (8)

電力需給用計器用変圧器および複数の電力需給用変流器と、
第１方向に伸びる導体を収容し、前記電力需給用計器用変圧器および前記複数の電力需給用変流器が接続されるタンクユニットと、を有し、
前記電力需給用計器用変圧器および前記複数の電力需給用変流器に含まれる機器のうち少なくとも一対の第１機器が、前記タンクユニットに含まれる１個の第１タンクに接続され、
前記一対の第１機器は、それぞれの少なくとも一部が、相互に前記第１方向に重なって配置される、
電力需給用計器用変成器。 a power supply and demand potential transformer and a plurality of power supply and demand current transformers;
a tank unit containing a conductor extending in a first direction and connected to the power supply and demand potential transformer and the plurality of power supply and demand current transformers;
At least a pair of first devices among the devices included in the power supply and demand potential transformer and the plurality of power supply and demand current transformers are connected to one first tank included in the tank unit,
At least a part of each of the pair of first devices is arranged to overlap each other in the first direction,
Transformers for power supply and demand meters. 前記一対の第１機器は、前記第１タンクを挟んで相互に反対側に配置される、
請求項１に記載の電力需給用計器用変成器。 The pair of first devices are arranged on opposite sides of the first tank,
2. The power supply and demand instrument transformer according to claim 1. 前記一対の第１機器の一方は、前記第１タンクの上方に配置され、
前記一対の第１機器の他方は、前記第１タンクの下方に配置される、
請求項２に記載の電力需給用計器用変成器。 One of the pair of first devices is arranged above the first tank,
The other of the pair of first devices is arranged below the first tank,
3. The power supply and demand instrument transformer according to claim 2. 前記一対の第１機器の一方は、前記第１タンクの水平方向の一方側に配置され、
前記一対の第１機器の他方は、前記第１タンクの水平方向の他方側に配置される、
請求項２に記載の電力需給用計器用変成器。 One of the pair of first devices is arranged on one side of the first tank in the horizontal direction,
The other of the pair of first devices is arranged on the other side of the first tank in the horizontal direction,
3. The power supply and demand instrument transformer according to claim 2. 前記電力需給用計器用変圧器および前記複数の電力需給用変流器の全てが、前記第１タンクに接続され、
前記導体に対する前記電力需給用計器用変圧器の接続点は、前記導体に対する前記複数の電力需給用変流器の接続点より、前記第１方向の一方側に配置される、
請求項１から４のいずれか１項に記載の電力需給用計器用変成器。 all of the power supply and demand potential transformer and the plurality of power supply and demand current transformers are connected to the first tank;
A connection point of the power supply and demand potential transformer with respect to the conductor is arranged on one side in the first direction from a connection point of the plurality of power supply and demand current transformers with respect to the conductor,
5. The power supply and demand meter transformer according to any one of claims 1 to 4. 前記電力需給用計器用変圧器および前記複数の電力需給用変流器に含まれる機器のうち前記一対の第１機器とは異なる第２機器が、前記第１タンクに接続され、
計器用変圧器、接地開閉器、検電装置および電力需給用変流器のうちいずれか１つの第３機器が、前記第１タンクに接続され、
前記第２機器の少なくとも一部と、前記第３機器の少なくとも一部とが、相互に前記第１方向に重なって配置される、
請求項１から４のいずれか１項に記載の電力需給用計器用変成器。 A second device different from the pair of first devices among the devices included in the power supply and demand potential transformer and the plurality of power supply and demand current transformers is connected to the first tank,
A third device, which is any one of a voltage transformer, a grounding switch, a voltage detection device, and a power supply and demand current transformer, is connected to the first tank,
At least part of the second device and at least part of the third device are arranged to overlap each other in the first direction,
5. The power supply and demand meter transformer according to any one of claims 1 to 4. 前記タンクユニットは、前記第１タンクの前記第１方向の隣りに絶縁スペーサを挟んで配置される第２タンクを有し、
前記電力需給用計器用変圧器および前記複数の電力需給用変流器に含まれる機器のうち前記一対の第１機器とは異なる第２機器が、前記第２タンクに接続される、
請求項１から４のいずれか１項に記載の電力需給用計器用変成器。 The tank unit has a second tank arranged next to the first tank in the first direction with an insulating spacer interposed therebetween,
A second device different from the pair of first devices among the devices included in the power supply and demand potential transformer and the plurality of power supply and demand current transformers is connected to the second tank.
5. The power supply and demand meter transformer according to any one of claims 1 to 4. 請求項１から７のいずれか１項に記載の電力需給用計器用変成器を有する、
ガス絶縁開閉装置。 Having the power supply and demand meter transformer according to any one of claims 1 to 7,
Gas insulated switchgear.
JP2022022047A 2022-02-16 2022-02-16 Instrument transformer for power supply and demand and gas insulated switchgear Pending JP2023119252A (en)

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