JPH0793772B2 - Gas insulated switchgear - Google Patents

Description

Description: [Object of the invention] (Field of industrial application) The present invention relates to a gas-insulated switchgear, and particularly to a device when two or more air-insulated transmission lines are arranged in parallel. The present invention relates to a gas-insulated switchgear with improved layout.

In (prior art) substations or switching station to be installed in large cities around Toka waterfront area, for reasons of obtaining difficulty Toka salt damage, etc. of the land, the electric devices constituting the substation Toka switchyard, SF ₆ gas A gas-insulated switchgear sealed with an insulating medium having excellent insulation and arc extinguishing properties is used. In this type of gas-insulated switchgear, a circuit breaker, a disconnecting switch, and other required equipment are arranged three-dimensionally, the distance between the equipment is narrowed, and the site area is greatly reduced.

An example of the arrangement of such a conventional gas-insulated switchgear is shown in FIGS. 2 and 3. That is, FIG. 2 shows an example in which two or more transmission line circuits are arranged side by side and the circuit breaker 1 is arranged vertically.

As shown in FIG. 2, the circuit breakers 1 are juxtaposed on the same side with respect to the main bus bar 2, and the circuit breakers 1 to the air insulating bushings 3 are connected by an insulating bus bar 4.
At this time, the connection bus 4b of the transmission line B is arranged parallel to the main bus 2 in order to secure the insulation distance from the bushing 3a of the transmission line A to the connection bus 4a of the transmission line A. , And then the bushing 3b of the transmission line B, which is arranged with a sufficient insulation distance from the bushing 3a of the transmission line A.
Connected with.

However, when an accident occurs in the connecting bus bar or equipment of the transmission line B or during inspection work, the adjacent circuit breakers 1a, 1b
Since the interval between the two is narrow, the adjacent transmission line A must also be stopped, the stop range becomes very large, and the social impact is large.

On the other hand, during an accident or inspection of the transmission line circuit B, the transmission line circuit A
In order to be able to work without stopping the power line, the air bussiness bushing 3a of the transmission line A and the connecting busbar of the transmission line B are connected.
The distance to 4b had to be very large. For example, in the 550 KV class, this distance reaches 11 m, the entire installation space becomes large, and the connecting bus bar 4a of the transmission line A has to be long.

Further, as shown in FIG. 3, it is considered to arrange the circuit breaker 1 on the opposite side with the main bus 2 as the center. Note that FIG. 3 shows an example in which the circuit breakers are horizontally arranged. That is, the circuit breaker 11a of the power transmission line A, the circuit breaker 11B of the power transmission line B, and the circuit breakers 11b and 11c of the power transmission line C are arranged on the opposite sides of the main bus 2. The circuit breakers 11 and the bushings 13a, 13b, 13c of the transmission line circuits are connected to the connecting busbars 14a, 14b, 14c.
Connected by.

In the gas-insulated switchgear having such a configuration, the breaker 11 is arranged on the opposite side of the main bus 2 even if an accident occurs in the connection bus or equipment in each transmission line or during inspection work. Therefore, it is not necessary to stop the adjacent transmission line.

However, in this case, the connection bus 14a of the transmission line A
However, there is a drawback in that the connecting buses 14b and 14c to the transmission line connection points of the transmission line circuit B and the transmission line circuit C become very long and the entire installation space increases.

(Problems to be Solved by the Invention) As described above, in a gas-insulated switchgear in which two or more air-insulated transmission line circuits are juxtaposed, the adjacent transmission line line is also stopped at the time of an accident or inspection. Had to let.
Further, in order to carry out inspections, repairs, etc. without stopping other power transmission line circuits, it is necessary to increase the distance between the devices, resulting in a large installation space.

Therefore, the present invention eliminates the above drawbacks, and even when two or more transmission line circuits are juxtaposed, the stop range at the time of an accident or during inspection work can be minimized, and the number of connecting buses can be significantly reduced. Another object of the present invention is to provide a gas-insulated switchgear capable of reducing the installation space.

[Configuration of the Invention] (Means for Solving the Problems) In the gas insulation opening device of the present invention, the circuit breakers of the adjacent transmission line circuits are arranged on the same side with respect to the main bus, and The busbar-side disconnector is connected via an auxiliary busbar arranged in parallel with the main busbar.

(Operation) In the gas-insulated switchgear of the present invention, the circuit breakers of the adjacent air-insulated transmission line circuits are arranged on the same side with respect to the main bus, and the circuit breaker is disconnected from the main bus-side disconnector connected to the main bus. By connecting the container with the auxiliary busbar arranged parallel to the main busbar,
It does not stop the adjacent transmission line circuit at the time of an accident or during inspection work, and the installation space is greatly reduced.

(Example) Hereinafter, one example of the present invention will be specifically described with reference to FIG. The same members as those of the conventional type shown in FIGS. 2 and 3 are designated by the same reference numerals and the description thereof will be omitted.

* Structure of Embodiment * In this embodiment, as shown in FIG.
In the transmission line B arranged in parallel with each other, an auxiliary bus 21 provided in parallel with the main bus 2 is connected to the bus-side disconnector 20 provided on the main bus 2, and the auxiliary bus 21 The breaker 22b of the power transmission line B is connected to the tip of the power transmission line B, and the bushing 23b of the power transmission line B is connected to the circuit breaker 22b.

The circuit breaker 22b on the side of the power transmission line B and other devices are arranged at a position apart from the insulation separation distance of the air insulating bushing 23a on the side of the power transmission line A.

* Operation of the embodiment * In the gas-insulated switchgear of the present embodiment having such a configuration, the gas-insulated switchgear of the present embodiment is connected to the side of the transmission line A even during the inspection work of the circuit breaker 22b of the transmission line B and the like and the accident recovery work. Since the sufficient insulation distance is secured, it is not necessary to stop the power transmission line A.

In addition, since a long connecting busbar is not arranged between the air insulating bushing 23 and the main bus 2 in both the transmission line circuits A and B, the distance between the bushing and the main bus can be set to the minimum. The installation space can be greatly reduced.

Further, since the circuit breaker of each power transmission line can be arranged on the same side with respect to the main bus, maintenance and inspection work can be efficiently performed.

As described above, in the present embodiment, even if a certain transmission line circuit is stopped due to an accident, inspection work, or the like, the distance between adjacent circuit breakers is secured, so that another transmission line circuit is stopped. There is no need, and the number of connecting buses can be significantly reduced, and the installation space can be reduced.

* Other Embodiments * The present invention is not limited to the above embodiments, and the circuit breaker may be arranged vertically. Further, the auxiliary bus bar arranged between the bus bar side disconnector and the circuit breaker may be of single-phase type or three-phase type.

[Advantages of the Invention] As described above, according to the present invention, since the auxiliary bus bar is arranged between the main bus bar side disconnector and the line side circuit breaker, the main bus bar and the connecting bus bar are adjacent to each other without being extended. Since it is possible to easily secure the distance between the circuit breaker and the circuit breaker, it is possible to minimize the stop range when an accident occurs or during inspection work, and it is possible to significantly reduce the connecting bus bar and installation space. It is possible to provide the gas insulated switchgear described above.

[Brief description of drawings]

FIG. 1 is a plan view showing an example of arrangement of equipment of a gas insulated switchgear of the present invention, and FIGS. 2 and 3 are plan views showing examples of arrangement of equipment of a conventional gas insulated switchgear. . 1 ... Circuit breaker, 2 ... Main busbar, 3 ... Bushing, 4 ...
… Connecting busbar, 11 …… Breaker, 13 …… Bushing, 14 ……
Connection busbar, 20 …… disconnector, 21 …… auxiliary busbar, 22 …… breaker, 23 …… bushing.

Claims (5)

[Claims] 1. The main bus bar has at least two air-insulated transmission lines.
In a gas-insulated switchgear arranged in parallel with more than one line, the circuit breakers of adjacent transmission line circuits are arranged on the same side with respect to the main bus, and the circuit breaker and the main bus-side disconnector connected to the main bus Is connected via an auxiliary bus bar arranged in parallel with the main bus bar. 2. The gas-insulated switchgear according to claim 1, wherein the auxiliary bus bar has a three-phase one-piece configuration. 3. The gas-insulated switchgear according to claim 1, wherein the auxiliary bus bar is constituted by a phase separation type. 4. The gas insulated switchgear according to claim 1, wherein the circuit breaker is arranged vertically. 5. The gas insulated switchgear according to claim 1, wherein the circuit breaker is horizontally arranged.