JP6340271B2 - Gas insulated switchgear - Google Patents

Description

  Embodiments described herein relate generally to a cubicle-type gas-insulated switchgear that constitutes two-line power reception.

  Conventionally, in a gas-insulated switchgear that constitutes two-line power reception, the components of the service line and the backup line are housed in boxes for each system, and these boxes are lined up to form a power supply system ( For example, see Patent Document 1).

  This type of gas-insulated switchgear is shown in FIG. 5 and consists of a service line and a spare line, and a service line receiving panel 1a, a backup line receiving panel 1b, a transformer (VCT) panel 1c, a spare line main primary panel 1d, Two-line power reception is constituted by a five-sided board of the main line primary variable board 1e.

  The service line power receiving panel 1a includes a service line power receiving cable head 2a, service line primary ground switch 3a, service line primary disconnect switch 4a, service line power receiving circuit breaker 5a, service line secondary disconnect switch 6a, service line secondary ground. The switches 7a are arranged and connected in order, and the main circuit is led out to the ceiling by the service line power receiving T-type bushing 8a. The backup line receiving panel 1b includes a backup line receiving cable head 2b, a backup line primary grounding switch 3b, a backup line primary disconnecting switch 4b, a backup line receiving circuit breaker 5b, a backup line secondary disconnecting switch 6b, and a backup line secondary grounding. The switches 7b are arranged and connected in order, and the main circuit is led out to the ceiling portion by the spare line power receiving T type bushing 8b.

  The transformer panel 1c houses a power meter transformer 9, and one main circuit is led out to the ceiling by a service line VCTT type bushing 10a. The other main circuit is led out to the ceiling by a spare line VCTT type bushing 10b.

  A spare line load disconnect switch 11a, a spare line load circuit breaker 12a, a spare line load grounding switch 13a, and a spare line load cable head 14a are arranged and connected in order to the spare line main variable primary panel 1d. It is connected to the. A main circuit is connected to the spare line load disconnector 11a from a spare line load T-type bushing 15a provided on the ceiling. The service line main variable primary panel 1e is provided with a service line load disconnector 11b, service line load circuit breaker 12b, service line load grounding switch 13b, service line load cable head 14b in order and connected to the service line transformer (not shown). It is connected to the. A main circuit is connected to the service line load disconnector 11b from a service line load T-type bushing 15b provided on the ceiling.

  Main circuits of the service line power receiving T-type bushing 8a, service line VCTT type bushing 10a, and service line load T-type bushing 15b are connected to the ceiling of the service line power receiving panel 1a to the service line main variable primary panel 1e. Also, the main circuits of the standby line power receiving T type bushing 8b, the backup line VCTT type bushing 10b, and the backup line load T type bushing 15a are connected. Insulation gas such as SF6 gas is provided in each panel of the service line power receiving panel 1a, the standby line power receiving panel 1b, the transformer panel 1c, the spare line main variable primary panel 1d, and the service line main variable primary panel 1e excluding the ceiling. Is enclosed.

  Thus, although it is possible to perform two-line power reception satisfactorily, it has been desired to reduce the amount of insulating gas used from the viewpoint of environmental conservation.

JP-A-6-233420

  The problem to be solved by the present invention is to provide a gas-insulated switchgear that can reduce the amount of insulating gas used in a two-line power receiving configuration including a service line and a backup line.

In order to solve the above problems, the gas-insulated switchgear according to the embodiment includes a two-line storage power receiving board and a two-line storage main variable primary panel arranged on the two-line storage power reception board. The storage power receiving panel is divided into left and right by a power receiving partition wall provided in the vertical direction, and is divided into gas into a service line power receiving room and a standby line power receiving room, and the service line power receiving room includes a service line primary ground switch, Among the service line primary disconnect switch, service line power receiving circuit breaker, service line secondary disconnect circuit switch, service line secondary ground switch, at least the service line power receiving circuit breaker is accommodated, and the spare line power receiving chamber has a spare line. Among the primary grounding switch, the spare line primary disconnector, the spare line receiving circuit breaker, the spare line secondary disconnecting switch, and the standby line secondary grounding switch, at least the spare line receiving circuit breaker is stored, and the two-line storage main varying the primary board is the primary variable Release partition wall provided in the longitudinal direction is divided into right and left備線main variable chamber is gas divided into a regular line main variable chamber Rutotomoni, the VCT chamber provided in VCT partition wall provided in the transverse direction in the lower portion of said common line main variable chamber and the pre-line main variable chamber, The spare line main change chamber contains at least the spare line load disconnect switch among the backup line load disconnect switch, the backup line load circuit breaker, and the backup line load ground switch, Of the service line load disconnector, service line load circuit breaker, service line load earthing switch, at least the service line load disconnector is accommodated, and the VCT chamber contains a power meter transformer. And

The arrangement | positioning single wire connection figure of the gas insulation switchgear which concerns on the Example of this invention. The side view which shows the structure of the receiving panel of the gas insulation switchgear which concerns on the Example of this invention. The front view which shows the structure of the receiving panel of the gas insulation switchgear which concerns on the Example of this invention. The side view which shows the structure of the main variable primary board of the gas insulation switchgear which concerns on the Example of this invention. The arrangement | positioning single wire connection diagram of the conventional gas insulation switchgear.

  Embodiments of the present invention will be described below with reference to the drawings.

  A gas insulated switchgear according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a single line connection diagram of a gas-insulated switchgear according to an embodiment of the present invention according to an embodiment of the present invention, and FIG. 2 shows a configuration of a power receiving panel of the gas-insulated switchgear according to an embodiment of the present invention. FIG. 3 is a front view showing a configuration of a power receiving panel of a gas insulated switchgear according to an embodiment of the present invention, and FIG. 4 is a configuration of a main variable primary panel of a gas insulated switchgear according to an embodiment of the present invention. FIG. In addition, the same code | symbol was attached | subjected to the component similar to the past.

  As shown in FIG. 1, a two-line storage power receiving panel 20a that collectively stores power-receiving devices for the service line and the standby line, and a 2-line that stores the load-side devices for the service line and the protection line as well as a transformer. Two-line power reception is constituted by a two-sided panel of the main storage primary board 20b.

  The two-line storage power receiving board 20a is provided with a metal power receiving board partition wall 21 in the vertical direction, and is divided into a gas in a service line power receiving chamber 22a and a standby line power receiving chamber 22b. A power receiving board insulating spacer 23 is airtightly provided on the power receiving board partition wall 21.

  In the service line power receiving chamber 22a, the service line power receiving cable head 2a, service line primary grounding switch 3a, service line primary disconnect switch 4a, service line receiving circuit breaker 5a, service line secondary disconnector 6a, The service line secondary ground switch 7a is arranged and connected in order. Also in the standby line power receiving chamber 22b, the backup line receiving cable head 2b, the backup line primary grounding switch 3b, the backup line primary disconnecting switch 4b, the backup line receiving circuit breaker 5b, the standby line secondary disconnecting switch 6b, The spare line secondary ground switch 7b is arranged and connected in order, and the main circuit is led to the ceiling by the power receiving panel T-type bushing 24. The main circuits of the service line secondary grounding switch 7 a and the spare line secondary grounding switch 7 b are connected via a power receiving panel insulating spacer 23.

  The two-line storage main variable primary panel 20b is provided with a metal main disk partition wall 25 in the vertical direction and a VCT partition wall 26 in the horizontal direction, and the spare line main variable chamber 27a in the left and right direction and the main line main line. The gas is divided into a transformation chamber 27b and a lower VCT chamber 27c. The main platen partition wall 25 is provided with a main platen insulating spacer 28 in an airtight manner, and the VCT partition wall 26 is provided with VCT insulating spacers 29a and 29b in an airtight manner.

  In the spare line main variable chamber 27a, the spare line load disconnector 11a, the spare line load circuit breaker 12a, the spare line load grounding switch 13a, and the spare line load cable head 14a are arranged and connected in order, as in the prior art, not shown. Connected to backup line transformer. The primary side of the backup line load disconnector 11a is connected to the main circuit of the VCT insulating spacer 29a. Similarly to the conventional case, the service line main change chamber 27b is also provided with a service line load disconnector 11b, service line load circuit breaker 12b, service line load grounding switch 13b, and service line load cable head 14b in this order, not shown. Connected to utility line transformer. The primary circuit on the primary side of the service line load disconnector 11b and the primary side of the backup line load disconnector 11a are connected via a main platen insulating spacer 28.

  The VCT chamber 27c houses the power meter transformer 9, and one main circuit (for example, the output side) is connected to the VCT insulating spacer 29a. The other main circuit (for example, the input side) is connected to a main platen T-shaped bushing 30 provided on the ceiling via a VCT insulating spacer 29b. The VCT insulating spacer 29b and the main platen T-shaped bushing 30 may be provided in the service line main variable chamber 27b and connected to the main circuit. At the ceiling of the two-line storage power receiving panel 20a and the two-line storage main variable primary panel 20b, the main circuits of the power reception panel T-shaped bushing 24 and the main variable panel T-shaped bushing 30 are connected.

  An insulating gas such as SF6 gas is sealed in each of the service line receiving chamber 22a, the standby line power receiving chamber 22b, the backup line main variable chamber 27a, and the service line main variable chamber 27b except for the ceiling. When the power meter transformer 9 is gas-insulated, an insulating gas is also sealed in the VCT chamber 27c. If the power meter transformer 9 is air-insulated, the VCT chamber 27c is filled with dry air or the like.

  Next, taking the spare line power receiving chamber 22b as an example, the arrangement of the storage devices will be described with reference to FIG. The arrangement of the service line power receiving chamber 22a is the same.

  As shown in FIG. 2, the box body 31 is divided into left and right parts by vertical partition walls 32a and 32b, and the central part is further divided into upper and lower parts by horizontal partition walls 32c. 33b, a bus room 33c, and a control room 33d. An insulating gas is sealed in the circuit breaker chamber 33b and the busbar chamber 33c.

  The cable chamber 33a is provided with a backup power receiving cable head 2b and fixed to the partition wall 32a. In the circuit breaker chamber 33b, a spare line primary ground switch 3b and a spare line primary disconnector 4b are provided and fixed to the partition wall 32b. The spare line primary grounding switch 3b and the spare line primary disconnector 4b are integrated, and are similarly integrated in the following. In this upward direction, a standby line power receiving breaker 5b is provided, and the main circuit is connected to an insulating spacer 34 fixed to the partition wall 32c. A spare line secondary disconnector 6b and a spare line secondary ground switch 7b are provided in the bus bar chamber 33c, and are fixed to the partition wall 32b. The main circuit of the secondary secondary ground switch 7 b is connected to the power receiving panel T-type bushing 24 and the power receiving panel insulating spacer 23. A service line power receiving chamber 22 a is provided on the back side of the power receiving board insulating spacer 23.

  The control room 33d is provided with operation mechanisms 35a, 35b, and 35c for the respective devices. 36a is a front door, and 36b is a back door. As shown in FIG. 3, the operation mechanisms 35a, 35b, and 35c are arranged in the same manner for the regular line and the spare line. A reference line is a spare line.

  Next, the arrangement of the storage devices will be described with reference to FIG. 4 by taking the spare line main variable chamber 27a of the two-line storage main variable primary panel 20b as an example. The arrangement of the service line main changing room 27b is the same.

  As shown in FIG. 4, the box body 37 is divided into upper and left parts by vertical partition walls 38 a and 38 b, and the lower part is further divided by horizontal partition walls 38 c, and the main circuit chamber 39 a, VCT chamber 39 b, The control rooms 39c and 39d are configured separately. An insulating gas is sealed in the main circuit chamber 39a.

  In the main circuit chamber 39a, a backup line load disconnector 11a is provided and fixed to the partition wall 38a. A spare line load circuit breaker 12a and a spare line load grounding switch 13a are provided opposite to this, and are fixed to the partition wall 38b. The main circuit of the backup line load ground switch 13a is connected to a backup line load cable head 14a provided on the ceiling. The primary side of the spare line load disconnector 11 a is connected to the main platen insulating spacer 28. A service line main change chamber 27 b is provided on the back side of the main shift plate insulating spacer 28. A main turntable T-shaped bushing 30 is provided on the ceiling.

  A power meter transformer 9 is provided in the VCT chamber 39b. The control room 39c is provided with operating mechanisms 40a and 40b for the backup line load circuit breaker 12a and the backup line load grounding switch 13a, and the control room 39d is provided with an operating mechanism 40c for the backup line load disconnector 11a. 41a is a front door and 41b is a back door.

  As a result, the two-line storage power receiving panel 20a is divided by the power receiving chamber partition wall 21 to divide the gas into the normal power receiving chamber 22a and the standby power receiving chamber 22b, and the primary grounding switches 3a, 3b, primary are respectively provided in the respective chambers 22a, 22b. The power receiving side insulating spacer 23 provided in the power receiving chamber partition 21 accommodates the power receiving side devices of the disconnecting switches 4a and 4b, the power receiving circuit breakers 5a and 5b, the secondary disconnecting switches 6a and 6b, and the secondary grounding switches 7a and 7b. Since the main circuit of the service line and the backup line are connected, what has conventionally been constituted by two sides can be constituted by one side.

  In addition, the power receiving side devices from the primary grounding switches 3a, 3b to the secondary grounding switches 7a, 7b are arranged in a vertical line from the bottom to the top, and the operation axes of these devices are arranged horizontally to shorten the main circuit. Since they are connected at a distance, the volumes of the normal power receiving chamber 22a and the standby line power receiving chamber 22b can be reduced, and the amount of insulating gas used can be reduced. Further, the installation area can be reduced. Furthermore, since the power receiving system is made independent by the two-line storage power receiving panel 20a, it is possible to prevent the load side from being mixed and to improve the reliability.

  Also in the two-line storage main variable primary panel 20b, the main line partition wall 25 partitions the gas into a spare line main variable chamber 27a and a service line main variable chamber 27b, and each of the chambers 27a and 27b has a load disconnector 11a. 11b, load circuit breakers 12a and 12b, load grounding switches 13a and 13b, load side devices are housed, and main circuit of spare line and service line are connected by main platen insulating spacer 28 provided on main platen partition wall 25. Therefore, what was conventionally constituted by two surfaces can be constituted by one surface. Further, the amount of insulating gas used can be reduced and the installation area can be reduced. Furthermore, since the load system including the power meter transformer 9 is made independent by the two-line storage main transformation primary panel 20b, it is possible to prevent the power supply side from being mixed.

  The VCT chamber 27c for storing the power meter transformer 9 can be independent on one side, and can have a three-sided configuration in which the two-line storage power receiving panel 20a and the two-line storage main variable primary panel 20b are arranged.

  According to the gas-insulated switchgear of the above embodiment, the power receiving system of the service line and the backup line is configured on one side, and the load system including the power meter transformer 9 is also configured on one side. The amount of insulating gas used can be reduced, and the installation area can be reduced.

  In the above embodiment, the power receiving side devices housed in the power receiving chambers 22a and 22b are the primary grounding switches 3a and 3b, the primary disconnectors 4a and 4b, the power receiving circuit breakers 5a and 5b, the secondary disconnectors 6a and 6b, and the secondary grounding. Although described with the switches 7a and 7b, switching between the service line and the backup line can be performed by using at least the power receiving circuit breakers 5a and 5b. Moreover, although the load side equipment accommodated in the main transformation chambers 27a and 27b has been described using the load disconnectors 11a and 11b, the load circuit breakers 12a and 12b, and the load ground switches 13a and 13b, at least the load disconnectors 11a and 11b. Can be used to switch between the transformer for the service line and the backup line. In this case, the transformer has a small capacity.

  Also, for the two-line power reception provided with a bypass circuit and a loop circuit, the power reception system for the service line and the backup line is configured on one surface, and the load system including the power meter transformer 9 is configured on one surface. be able to.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

3a Service Line Primary Grounding Switch 3b Spare Line Primary Grounding Switch 4a Service Line Primary Disconnect Switch 4b Spare Line Primary Disconnect Switch 5a Service Line Power Breaker 5b Spare Line Power Breaker 6a Service Line Secondary Switch 6b Spare Line Secondary Disconnector 7a Service line secondary ground switch 7b Spare line secondary ground switch 9 Power meter transformer 11a Spare line load disconnector 11b Service line load disconnector 12a Spare line load circuit breaker 12b Service line load circuit breaker 13a Spare line load earthing switch 13b Common line load earthing switch 20a Two-line storage power receiving board 20b Two-line storage main variable primary panel 21 Power receiving panel bulkhead 23

Claims (4)

2 line storage power board,
It is composed of a two-line storage main transformation primary board arranged on the two-line storage power receiving board,
The two-line storage power receiving panel is divided into left and right by a power receiving partition wall provided in the vertical direction, and is divided into gas into a normal line power receiving chamber and a standby line power receiving chamber,
The service line power receiving chamber includes at least the service line power reception cutoff among service line primary grounding switch, service line primary disconnector, service line receiving circuit breaker, service line secondary disconnecting switch, service line secondary grounding switch. Store the vessel,
The spare line power receiving chamber includes at least the spare line power receiving cutoff among a spare line primary ground switch, a spare line primary disconnector, a spare line power breaker, a spare line secondary disconnector, and a spare line secondary ground switch. Store the vessel,
The two-line housing main variable primary board is the primary variable Release partition wall provided in the longitudinal direction is divided into left and right is the gas divided into a regular line main variable chamber and pre-line main variable chamber Rutotomoni, provided laterally A VCT chamber is provided in the lower part of the spare line main variable chamber and the normal line main variable chamber with a VCT partition wall,
The spare line main variable chamber accommodates at least the spare line load disconnect switch among the spare line load disconnect switch, the spare line load circuit breaker, and the spare line load ground switch,
In the service line main change room, at least the service line load disconnect switch is housed among service line load disconnect switch, service line load circuit breaker, service line load ground switch ,
A gas-insulated switchgear comprising a power meter transformer housed in the VCT chamber .   2. A receiving board insulating spacer is provided on the receiving board partition wall, and a main circuit of the service line secondary ground switch and the spare line secondary ground switch is connected by the receiving board insulating spacer. Gas-insulated switchgear as described in 1.   The main platen partition wall is provided with a main platen insulating spacer, and a primary side of the backup line load disconnector and a primary side of the service line load disconnector are connected by the main platen insulating spacer. The gas-insulated switchgear according to claim 1 or 2. The service line primary grounding switch, the service line primary disconnector, the service line receiving circuit breaker, the service line secondary disconnector, and the service line secondary grounding switch are arranged in a vertical line from the bottom to the top. At the same time, the operation axis is placed horizontally,
The spare line primary grounding switch, the spare line primary disconnector, the spare line receiving circuit breaker, the spare line secondary disconnector, and the spare line secondary grounding switch are also arranged in a vertical line from the bottom to the top. The gas insulated switchgear according to any one of claims 1 to 3 , wherein the operation shaft is disposed laterally .