JP4397671B2 - Gas insulated switchgear - Google Patents

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 switchgear 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 conventional technology, the circuit breaker of the gas insulated switchgear unit for the power transmission line is installed horizontally, but the top view is U-shaped (the shape of the bent part of the horizontal circuit breaker and the two branch buses). Connected to the bus. Since the branch bus is arranged between the circuit breakers, the breakers for each of the three phases must be arranged separately. 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 gas-insulated switchgear according to the present invention includes two main buses arranged in parallel, a bus-insulated gas-insulated switch unit for connecting the main buses, and the bus-insulated gas-insulated switch unit on one side of the main buses. A gas insulated switching unit for a transmission line having a horizontal circuit breaker that is arranged so as to sandwich each of the main buses and the transmission line, and a gas insulated switch for bus connection on the other side of each of the main buses A gas-insulated switching unit for a transformer line, which is disposed so as to sandwich the unit and the gas-insulated switching unit for each transmission line, and has a circuit breaker for connecting between each main bus and the transformer, The horizontal type circuit breaker of the gas insulated switchgear unit for the power transmission line is a gas insulated switchgear connected to the main buses via the branch buses, respectively. It is arranged in the central part of the main bus in the longitudinal direction, and each of the power-insulated gas-insulated switch units and the transformer-insulated gas-insulated switch units are substantially symmetrical about the bus-connecting gas-insulated switch unit. The horizontal breaker of the gas-insulated switchgear unit for the power transmission line is arranged on substantially the same horizontal axis of each main bus and is positioned above the vertical surface of the horizontal breaker. A branch bus is arranged on each of the main buses and connected to each main bus via a disconnector, and the branch bus is pulled out in a horizontal direction from an axial end face of the horizontal breaker and connected to a bushing. It is characterized by.

In the present invention, the horizontal breaker of the gas insulated switchgear unit for the power transmission line is arranged so that the branch bus connected to the main bus is located on the upper side of the vertical plane. Can be arranged. Therefore, breaker of 3-phase since it non-phase segregated operation-in one operating device, Ru easy operation of the disconnector. In addition, since the gas insulated switchgear unit for each power transmission line and each transformer line is appropriately arranged with respect to the gas insulated switchgear unit for bus connection, the installation area of the entire gas insulated switchgear can be reduced. Cost reduction can be achieved.

The main bus is configured as a double bus. One end of the horizontal breaker of the gas insulated switchgear 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 via the disconnector and the branch bus. The horizontal breaker of the gas-insulated switchgear unit for the power transmission line is arranged so that the branch bus connected to the main bus is located on the upper side of the vertical plane . 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. Horizontal mounted type breaker insulation closing unit for power lines lines, to form an L-shape to connect the disconnecting switch in the vertical plane by the breaker connecting Hasho curved portion of the branch bus, the busbar for a gas-insulated switchgear unit This circuit breaker is configured in a vertical configuration in which branch buses at both ends are connected in a U-shape on a vertical plane .

  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 (breaker connection end) of the branch bus 13 is positioned above the horizontal breaker 14 ( upper vertical surface) 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.

3, one end of the bus side disconnector 21, 22 (bus side end) is connected to the main bus 1 and 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 (breaker connection end) of the branch bus 23 is located on the upper side (vertical surface upper side ) of the horizontal breaker 24 and is bent vertically and connected to one end (bus-side end) of the breaker 24. Is done. 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 bus 25. 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 that of 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 horizontal breaker of the gas-insulated switchgear unit for the power transmission line is arranged so that the branch bus connected to the main bus is located above the vertical plane. Therefore, the breakers for each phase can be arranged close to each other. Therefore, breaker of 3-phase since it phase segregated operation with a single operating device, Ru easy operation of the disconnector. Moreover, since the gas insulated switchgear unit for each power transmission line and each transformer line has been appropriately disposed with respect to the gas insulated switchgear unit for connecting the bus line, the installation area of the entire gas insulated switchgear can be reduced. Cost reduction can be achieved.

Further, the above-described embodiments can be easily corresponds to the terminal position the height of the transformer because the transformer circuit for a gas-insulated switchgear unit is to use a circuit breaker of the horizontal-standing and vertically mounted type.

  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 (1)

Two main buses juxtaposed, a bus-insulated gas insulated switching unit for connecting the main buses, and a bus-insulated gas insulated switching unit on one side of the main buses, A gas-insulated switching unit for a transmission line having a horizontal circuit breaker for connecting between each main bus and the transmission line, the bus-insulating gas-insulated switching unit on the other side of each main bus and the gas for each transmission line A gas-insulated switching unit for a transformer line, which is arranged so as to sandwich an insulating switching unit, and has a circuit breaker that connects between each main bus and the transformer, and each of the gas-insulated switching units for each transmission line The horizontal breaker is a gas insulated switchgear connected to each main bus via a branch bus,
The bus-insulated gas insulated switching unit is disposed at the center in the longitudinal direction of the main bus, and the power-insulated gas-insulated switching units and the transformer-insulated gas-insulated switching units are connected to the bus. Arranged so as to be substantially symmetric with respect to the gas insulated switch unit, the horizontal breaker of the gas insulated switch unit for the transmission line is disposed on substantially the same horizontal axis of each main bus line, The branch buses are arranged so as to be located on the upper vertical surface of the circuit breaker, are connected to the main buses via the disconnectors, and the branch buses are horizontally connected from the axial end surface of the horizontal breaker. A gas-insulated switchgear characterized by being drawn out and connected to a bushing .

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