JP2005130657A - Gas-insulated switching gear - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas-insulated switching gear that allows the easy operation of a disconnector and is reduced in cost. <P>SOLUTION: A branched bus bar 13 and the disconnector 15 are connected to both ends of a laterally placed blocker 14, respectively, in a gas-insulated switching unit 10 for a power cable line that connects main bus bars 1, 2 and a power cable (bushing 17). The laterally placed blocker 14 is constituted such that the branched bus bar 13 and the disconnector 15 are connected in a lateral direction so as to form an L shape. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a gas insulated switchgear used for power transmission / distribution and power distribution.

  In general, gas-insulated switchgears are often used to open and close a power system in order to transmit and receive power and to receive and distribute power. The gas insulated switchgear usually draws two lines from the power system, and the main bus has a double bus system for stable power supply. The main bus bars are arranged in a phase-separated arrangement or a three-phase arrangement.

  Such a gas-insulated switchgear is in the case of a power-insulated switch unit for a transmission line that connects the main bus and the power transmission line, a gas-insulated switch unit for a transformer line that connects the main bus and the transformer, and a double bus. Is equipped with a gas-insulated switching unit for busbar communication.

  The gas-insulated switchgear unit for a power transmission line is configured such that one end of a circuit breaker is connected to a main bus via a branch bus and a disconnect bus, and the other end is connected to a bushing via a disconnect and the branch bus. . The transmission line of the power system is connected to the bushing.

  The gas insulated switchgear unit for transformer lines is configured to include a circuit breaker having one end connected to the main bus via the branch bus and disconnector and the other end connected to the transformer via the branch bus. . In addition, the bus-insulated gas insulated switchgear unit has a circuit breaker having one end connected to one main bus of the double bus via the branch bus and the other end connected to the other main bus via the branch bus. Configured.

  It is known that the circuit breaker of the gas insulated switching unit for the transmission line (bushing lead line) is a horizontal type and the circuit breaker of the gas insulated switch unit for the transformer line (cable lead line) is a vertical type. This is described, for example, in Patent Document 1 below.

JP 2002-305815 A

  In the prior art, the circuit breaker of the gas-insulated switchgear unit for the power transmission line is placed horizontally, but the top view is U-shaped and connected to the branch bus. The breakers for each of the three phases must be placed apart. For this reason, the disconnecting devices arranged in a substantially straight line with the circuit breaker are also separated from each other phase, making it difficult to operate the three-phase disconnecting device with one operating device. It is necessary to provide. Therefore, there are problems that the operation of the disconnector becomes troublesome and the cost is increased.

  An object of the present invention is to provide a gas insulated switchgear that can easily operate a disconnector and can reduce the cost.

  The present invention is characterized by having a circuit breaker having one end connected to the main bus via the branch bus and the other end connected to the bushing via the disconnector, and connecting the main bus and the power transmission line. The circuit breaker of the gas-insulated switchgear unit for the electric wire line is composed of a horizontal type that is connected so as to form an L shape in the horizontal direction with devices connected to both ends (branch bus and disconnector). .

  According to the present invention, the breaker of the gas insulated switchgear unit for the power transmission line is constituted by a horizontal type connected so as to form an L shape in the horizontal direction with the devices connected to both ends, so that each phase is interrupted Can be placed in close proximity. Therefore, since the three-phase disconnector can be operated in a three-phase operation with a single controller, the disconnector can be easily operated and the cost can be reduced.

  In the present invention, since the breakers of each phase of the gas insulated switchgear unit for the transmission line can be arranged close to each other, the disconnector can be operated in three phases at a time, and the disconnector can be operated easily, and Cost reduction can be achieved.

  The main bus is configured as a double bus. One end of the circuit breaker of the gas insulated switching unit for the power transmission line is connected to the main bus via the branch bus and the disconnector, and the other end is connected to the power transmission line via the disconnector and the branch bus. The transformer-insulated gas insulated switching unit has a circuit breaker having one end connected to the main bus via a branch bus and a disconnector and the other end connected to the transformer via a branch bus. The bus-insulated gas insulated switching unit has a circuit breaker having one end connected to one main bus of a double bus via a branch bus and the other end connected to the other main bus via a branch bus. The circuit breakers of both gas-insulated switchgear units for power transmission lines and transformer lines are composed of a horizontal type connected to form a L-shape in the horizontal direction with the equipment connected at both ends, for busbar connection The circuit breaker of the gas insulated switchgear unit is configured in a vertical configuration in which branch buses at both ends are connected in a U-shape in the vertical direction.

  FIG. 1 shows an embodiment of the present invention. FIG. 1 is a layout plan view of a gas insulated switchgear. FIG. 1 shows an example of a double bus.

  In FIG. 1, three-phase main buses 1 and 2 are connected to a bushing 17 by two gas-insulated switching units 10A and 10B for power transmission lines. The main buses 1 and 2 are connected to the transformers 3 and 4 by two transformer-insulated gas insulated switching units 20A and 20B. The transformer-line gas-insulated switch unit 20A uses a horizontal breaker, and the transformer-line gas-insulated switch unit 20B uses a vertical breaker. The main buses 1 and 2 are connected by a bus-insulating gas insulated switching unit 30.

  FIG. 2 shows an example configuration of the gas insulated switching unit 10 for a transmission line.

  In FIG. 2, main buses 1 and 2 have three-phase buses stretched around cylindrical bus containers. One end (bus-side end) of the bus-side disconnectors 11 and 12 is connected to the main buses 1 and 2. The disconnectors 11 and 12 are accommodated in the disconnector container. The other ends of the disconnectors 11 and 12, that is, the transmission line side (hereinafter referred to as the line side) end are connected to one end (bus side end) of the horizontal breaker 14 by the branch bus 13 housed in the branch pipe. . The circuit breaker 14 is housed in a circuit breaker container.

  The line-side end of the branch bus 13 is located above the horizontal breaker 14 and is bent vertically and connected to the bus-side end of the breaker 14. The bent portion at the line side end of the branch bus 13 forms an L-shaped short leg portion. The other end (line side end) of the horizontal breaker 14 is connected to one end (bus side end) of the line breaker 15 arranged horizontally with the horizontal breaker 14. The disconnect switch 15 is accommodated in the disconnect switch container.

  The horizontal breaker 14 forms an L-shaped long leg portion, and the branch bus 13 and the disconnecting switch 15 are connected in an L shape as indicated by reference numeral 18. In other words, the horizontal breaker 14 connects the devices connected to both ends (the branch bus 13 and the disconnecting switch 15) in an L shape. The other end (line side end) of the line side disconnector 15 is connected to a bushing 17 by a branch bus 16.

  Busbar container for storing and arranging main buses 1 and 2, disconnector container for storing and arranging disconnectors 11, 12 and 15, branch pipes for storing and arranging branch buses 13 and 16, and circuit breaker for storing and arranging horizontal circuit breaker 14 An insulating gas is hermetically sealed inside each container.

  FIG. 3 shows an example configuration of a gas insulated switching unit 20A for a transformer line using a horizontal breaker.

  In FIG. 3, one end (bus side end) is connected to the bus side disconnectors 21, 22 to the main buses 1, 2. The disconnectors 21 and 22 are accommodated in the disconnector container. The other ends (transformer ends) of the disconnectors 21 and 22 are connected to one end (bus side end) of the horizontal breaker 24 by a branch bus 23 accommodated in the branch pipe. The circuit breaker 24 is housed in a circuit breaker container.

  The transformer-side end of the branch bus 23 is located above the horizontal breaker 24 and is bent vertically and connected to one end (bus-side end) of the breaker 24. The bent part at the transformer side end of the branch bus 23 forms an L-shaped short leg part. The other end (transformer-side end) of the horizontal breaker 24 is connected to the bus-side end of the branch breaker 25 arranged horizontally with the horizontal breaker 24. The branch bus 25 is accommodated in the branch pipe.

  The horizontal breaker 24 forms an L-shaped long leg portion, and the branch buses 23 and 25 are connected in an L-shape as indicated by reference numeral 26. In other words, the horizontal breaker 24 connects devices (branching buses 23 and 25) connected to both ends in an L shape. The transformer-side end of the branch bus 25 is connected to the transformer 3.

  The insulating gas is sealed and enclosed in each of the disconnector container for accommodating and disposing the disconnectors 21 and 22, the branch pipe for accommodating and disposing the branch buses 23 and 25, and the breaker container for accommodating and disposing the horizontal breaker 24. Has been.

  The transformer-line gas-insulated switch unit 20B has the same configuration as the transformer-line gas-insulated switch unit 20A, except that the circuit breaker 24 is a vertical type. Whether the circuit breaker 24 is to be installed horizontally or vertically is determined by the height position of the connection terminals of the transformers 3 and 4.

  FIG. 4 shows an example of the configuration of the bus-insulated gas insulated switching unit 30.

  In FIG. 4, one end (bus side end) of disconnectors 31 and 32 is connected to main buses 1 and 2. The disconnectors 31 and 32 are accommodated in the disconnector container. The other end (line side end) of the disconnector 31 is connected to the vertical breaker 35 by a branch bus 33 housed in the branch pipe. The vertical breaker 35 is housed in a breaker container. The other end (line side end) of the disconnector 32 is connected to a vertical breaker 35 by a branch bus 34 accommodated in the branch pipe. The branch bus 34 is connected to the vertical circuit breaker 35 above the branch bus 33.

  The branch buses 33 and 34 are horizontally arranged and connected to the vertical type circuit breaker 35. The vertical circuit breaker 35 connects the branch buses 33 and 34 in the vertical direction as indicated by reference numeral 36. In other words, the vertical circuit breaker 35 connects devices (branching buses 33 and 34) connected to both ends in a vertical U-shape.

  In addition, the gas insulated switch unit 10 for power transmission line, the gas insulated switch unit 20 for transformer line, and the gas insulated switch unit 30 for bus line communication are provided with a ground switch, a current transformer, etc., but are not shown. .

  A single line connection diagram of the gas insulated switchgear configured as described above is as shown in FIG. FIG. 5 shows the gas-insulated switch units 10A and 10B for power transmission lines, the gas-insulated switch units 20A and 20B for transformer lines, and the gas-insulated switch unit 30 for bus connection surrounded by broken lines. In addition, symbols such as earthing switches, current transformers, and transformers are also shown. The single-line connection diagram of FIG. 5 is well known and will not be described in detail.

  The gas-insulated switchgear according to the present invention is configured as described above, and the circuit breaker of the gas-insulated switchgear unit for power transmission lines has devices that are connected to both ends (branch bus and disconnector) in an L shape in the horizontal direction. Since it is comprised by the horizontal type connected, the circuit breaker of each phase can be arrange | positioned closely. Therefore, since the three-phase disconnector can be operated in a three-phase operation with a single controller, the disconnector can be easily operated and the cost can be reduced.

  Moreover, since the gas insulated switch unit for power transmission lines uses a horizontal type circuit breaker and the gas insulated switch unit for busbar connection uses a vertical type circuit breaker, the above embodiment can shorten an expensive branch bus. Furthermore, the above-described embodiment can easily cope with the height of the terminal position of the transformer because the gas-insulated switching unit for the transformer line uses a horizontal type and a vertical type circuit breaker.

  In the above-described embodiment, an example of the double bus system is given, but it is obvious that the single bus system may be used.

It is an apparatus arrangement | positioning top view which shows one Example of this invention. It is an example block diagram of the gas insulated switching unit for power transmission lines of this invention. It is an example block diagram of the gas insulated switching unit for transformer lines of this invention. It is an example block diagram of the gas insulated switching unit for busbar connection of this invention. It is a single line connection diagram of one example of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 2 ... Main bus | bath, 3, 4 ... Transformer, 10 ... Gas insulated switch unit for power transmission lines, 11, 12, 15 ... Disconnector, 13.16 ... Branch bus, 14 ... Horizontal type circuit breaker, 17 ... Bushing, 18 ... L-shaped, 20 ... Gas-insulated switchgear unit for transformer line, 21, 22 ... Disconnector, 23.25 ... Branch bus, 24 ... Horizontal breaker, 26 ... L-shaped, 30 ... Bus connection Gas insulated switching unit, 31, 32 ... disconnector, 33.34 ... branch bus, 35 ... vertical circuit breaker, 36 ... U-shaped.

Claims (8)

  A branching bus connected to the main bus at one end, a branching bus connected to the main bus at the other end, a branching bus connected to the main bus at one end, a branching bus connected to the main bus at one end A branch bus connected to a transformer is connected, and includes a gas insulated switch unit for transformer line having a circuit breaker connecting the main bus and the transformer, and the circuit breaker of the gas insulated switch unit for the transmission line is A gas-insulated switchgear characterized in that it is configured in a horizontal form connected so as to form an L shape in the lateral direction with devices connected to both ends.   A gas insulated switching unit for a transmission line having one end connected to a main bus via a branch bus and the other end connected to a bushing via a disconnector, and the main bus connected to the main bus via one end of the branch bus A gas-insulated switch unit for a transformer line having a circuit breaker connected to the transformer via a branch bus, and the circuit breaker of the gas-insulated switch unit for the transmission line is connected to both ends. A gas-insulated switchgear comprising a horizontal type connected so as to form an L shape in a lateral direction between the branch bus and the disconnector.   A gas insulated switching unit for a transmission line having one end connected to a main bus via a branch bus and the other end connected to a bushing via a disconnector, and the main bus connected to the main bus via one end of the branch bus A gas-insulated switch unit for a transformer line having a circuit breaker connected to the transformer via a branch bus, the circuit breaker of the gas-insulated switch unit for both lines is connected to both ends. A gas-insulated switchgear comprising a horizontal type connected to form an L shape in a horizontal direction with a device.   A gas-insulated switching unit for a transmission line having one end connected to the main bus via a branch bus and disconnector and the other end connected to a bushing via the disconnect and branch bus, and one end branched branch A plurality of transformer-insulated gas-insulated switching units having a circuit breaker connected to the main bus via the branch bus and having the other end connected to the transformer via the branch bus. The circuit breaker of the unit is configured in a horizontally mounted shape so as to form an L shape in the horizontal direction with devices connected to both ends, and the plurality of gas-insulated switchgear units for transformer lines are at least one Gas-insulated switchgear unit for other transformer lines, which is composed of a horizontal type in which the circuit breaker in the gas-insulated switchgear unit for transformer lines is connected to form an L shape in the lateral direction with the equipment connected to both ends. Shielding in Instrument gas insulated switchgear, characterized in that is constituted by a vertical-standing.   A gas insulated switching unit for a transmission line having a double main bus, a circuit breaker having one end connected to the main bus via a branch bus and the other end connected to the power transmission via a disconnector; Is connected to the main bus via a branch bus, and the other end is connected to the transformer via the branch bus, and two transformer-insulated gas insulated switching units, and one end via the branch bus A bus-insulated gas insulated switching unit having a circuit breaker connected to the one main bus and having the other end connected to the other main bus via a branch bus, for the transmission line and the transformer line The gas circuit breaker of both gas insulated switchgear units is configured in a horizontal type connected to form an L shape in the horizontal direction with the equipment connected to both ends, the circuit breaker of the gas insulated switchgear unit for busbar connection is Branch buses at both ends are connected in a U-shape in the vertical direction Gas insulated switchgear characterized in that it consists of vertically mounted type to be.   A gas-insulated switching unit for a transmission line having one end connected to a main bus via a branch bus and disconnector and the other end connected to a bushing via the disconnect and branch bus A gas insulated switch unit for a power transmission line, characterized in that the device is configured in a horizontal configuration in which a branch bus connected to both ends and a disconnector are connected to form an L shape in the lateral direction.   A gas-insulated switching unit for a transformer line having a circuit breaker having one end connected to the main bus via a branch bus and a disconnector and the other end connected to the transformer via a branch bus, the circuit breaker Is a horizontal type connected to the branch buses at both ends so as to form an L shape in the lateral direction. Gas-insulated switching for busbar connection having a circuit breaker having one end connected to one main bus of the double bus via the branch bus and the other end connected to the other main bus of the double bus via the branch bus A gas insulated switchgear unit for busbar connection, characterized in that the circuit breaker has a vertical configuration in which branch busbars at both ends are connected in a U-shape in the vertical direction.

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