JPH08308042A - Gas insulated switchgear - Google Patents

Abstract

(57) [Abstract] [Purpose] For gas-insulated switchgear in which two or more air-insulated transmission line circuits are juxtaposed, the basic construction and busbar configuration are simplified, and the efficiency of busbar maintenance and inspection work is improved. [Structure] Circuit breaker 21 disposed in an adjacent power transmission line
a and 21b are arranged on the same side with respect to the main bus 2, and the circuit breaker 21 is provided on the opposite side of the circuit breakers 21b and 21a from the side where the main bus 2 is arranged.
air insulating bushings 12a, 12 facing b, 21a
Place b. Further, the connection bus bar 24a connecting the circuit breaker 21a and the air insulating bushing 12a, and the circuit breaker 21
b for connecting b and the air insulating bushing 12b
4b are arranged on the same axis vertically, and both connecting busbars 2
Both 4a and 24b are installed on the ground.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-insulated switchgear, and more particularly to an improved arrangement of a gas-insulated switchgear in which two or more air-insulated transmission line circuits are juxtaposed. is there.

[0002]

2. Description of the Related Art In recent years, gas-insulated switchgear has been used in substations and switchyards. What is a gas insulated switchgear?
This is a switchgear in which electrical equipment that composes a substation or switchgear is sealed with an insulating medium such as SF6 gas that has excellent insulation and arc extinguishing properties, and has the advantages of a small site area and high environmental resistance. is there. For this reason, this type of gas-insulated switchgear is commonly used in substations and switchyards installed around large cities and in coastal areas due to the difficulty of land acquisition and measures against salt damage. ing. Also,
As the demand for gas-insulated switchgear increases, it is required to reduce the space between each equipment to further reduce the site area. Therefore, a gas-insulated switchgear has been proposed in which the layout configuration is improved by, for example, arranging circuit breakers, disconnectors, and other required equipment in three dimensions.

A conventional example of such a gas-insulated switchgear will be described in detail with reference to FIGS. FIG. 4 is a single wire connection diagram of the gas insulated switchgear, and FIGS. 5 to 7 are examples of arrangement of constituent devices.

As shown in FIG. 5, the gas-insulated switchgear is provided with a main bus 2 and a bus section line C. Air-insulated transmission line circuits A and B are juxtaposed side by side with a bus section line C interposed therebetween. Circuit breakers 11a and 11b are horizontally arranged in the transmission line circuits A and B. These circuit breakers 1
1a and 11b are juxtaposed and connected to the same side with respect to the main bus 2 via the main bus-side disconnectors 1a and 1b.

Further, line disconnectors 3a and 3b are provided on the side of the circuit breakers 11a and 11b opposite to the side where the main bus 2 is arranged. An air insulating bushing 12b facing the line disconnecting switch 3a and connected to the power transmission line B is arranged, and an air insulating bushing 12a facing the line disconnecting switch 3b and connected to the power transmission line A is arranged. Has been done. Further, connecting busbars 13a, 13b are connected to the line disconnectors 3a, 3b, and the circuit breaker 11 is connected by these connecting busbars 13a, 13b.
The a and 11b are connected to the aerial insulating bushings 12a and 12b.

By the way, the air insulating bushing 12a is arranged so as to face the circuit breaker 11b, and the air insulating bushing 12b is arranged so as to face the circuit breaker 11a. That is, the positional relationship between the power transmission line circuits A and B and the air insulating bushings 12a and 12b are arranged so as to intersect. This is to adjust the load on the transmission line circuits A and B. Therefore, the connecting busbars 13a and 13b for connecting the circuit breakers 11a and 11b and the air insulating bushings 12a and 12b are arranged to intersect each other.

More specifically, in the conventional gas-insulated switchgear, as shown in FIG. 6, the connection bus bar 13a connected to the power transmission line A is disposed underground. On the other hand, as shown in FIG. 7, the connecting bus bar 13b connected to the power transmission line B is arranged on the ground, and is connected to the aerial insulating bushing 12b through the upper side of the connecting bus bar 13a arranged underground. There is.

[0008]

However, in the conventional gas-insulated switchgear configured as described above,
There were the following problems. That is, since one of the connecting busbars connected to the circuit breaker is arranged underground, a busbar embedding pit for burying the connecting busbar underground must be provided at the base of the gas-insulated switchgear. It was The bus bar embedding pit requires a considerably large space. For example, in the case of a 550 kV class bus bar, the width is 2
m, height must be about 3 m. Further, since the positional relationship between the power transmission line and the air insulating bushing intersects with each other, the length of the pit for the connecting bus connecting them is also very long. Therefore,
The basic construction of the gas-insulated switchgear was complicated by the provision of such a bus bar embedding pit. Further, by disposing one of the connecting busbars underground, there have been problems that the busbar configuration becomes very complicated and that maintenance and inspection work of the busbars is difficult.

As described above, in the conventional gas-insulated switchgear, when two or more air-insulated transmission line circuits are juxtaposed, the circuit breaker and the air-insulated bushing arranged in each transmission line line are connected. Since at least one of the connecting busbars to be installed in between must be installed underground, the basic construction of the gas-insulated switchgear and the busbar configuration are complicated, and the maintenance and inspection work of the busbars is difficult. It was

The present invention has been proposed in order to eliminate the above-mentioned problems, and an object of the present invention is to provide a foundation construction and a busbar configuration when two or more air-insulated transmission line circuits are juxtaposed. (EN) A gas-insulated switchgear that simplifies and improves the efficiency of maintenance and inspection work on busbars.

[0011]

In order to achieve the above object, the gas-insulated switchgear of the present invention includes first and second circuit breakers arranged in adjacent transmission line circuits with respect to a main busbar. On the same side, and on the opposite side of the main bus bar arrangement side of the second and first circuit breakers, the first and second air insulating bushings are arranged so as to face each circuit breaker, and the first circuit breaker is arranged. And a first connecting bus bar for connecting the first air insulating bushing and
The second connecting busbar and the second connecting busbar for connecting the second air insulating bushing are arranged above and below on the same axis, and both connecting busbars are arranged on the ground. To do.

[0012]

In the gas-insulated switchgear of the present invention having the above-mentioned structure, since the connection busbars connected to the adjacent transmission line circuits are both arranged on the ground, the pits for burying the connection busbars underground. Need not be provided. Therefore, the basic construction of the gas-insulated switchgear and the busbar configuration can be simplified, and the maintenance and inspection work of the connecting busbars can be easily performed on the ground. Furthermore, by arranging the two connecting bus lines on the same axis above and below, it is possible to reduce the site area of the gas insulated switchgear.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to FIGS. The same members as those in the conventional example shown in FIGS. 4 to 7 are designated by the same reference numerals and the description thereof will be omitted.

(1) Configuration of the Embodiment In this embodiment, an air-insulated transmission line A, which is adjacent to each other,
B is a gas-insulated switchgear arranged side by side, and the transmission line A
The first circuit breaker arranged in the above is called a circuit breaker 21a, and the second circuit breaker arranged in the transmission line B is called a circuit breaker 21b. Further, similarly to the conventional example shown in FIGS. 4 to 7, in this embodiment, in order to adjust the load of the transmission line circuits A and B, the transmission line circuits A and B and the air insulating bushings 12a and 12b are separated. It is arranged to intersect. That is, the air insulating bushing 12b is arranged facing the power transmission line A, and the air insulating bushing 12a is arranged facing the power transmission line B.

The structural features of this embodiment are as follows. That is, as shown in FIGS. 1 and 2, the circuit breaker 21b on the side of the power transmission line B is arranged vertically. Also,
A lead-out portion 22b is formed on the lower side of the circuit breaker 21b, and the main bus 2 is connected thereto. On the other hand, at the upper part of the circuit breaker 21b, the lead-out portion 2
3b is formed, and the line-side disconnector 3b is connected thereto. Furthermore, the connecting busbar 24 is connected to the line-side disconnector 3b.
b is arranged horizontally, and the breaker 21b and the aerial insulating bushing 12b are connected by this connecting bus bar 24b.

As shown in FIGS. 1 and 3, the circuit breaker 21a on the side of the power transmission line A is also arranged vertically. Further, a lead-out portion 22a is formed on the lower side of the circuit breaker 21a, and the main bus bar 2 is connected to the lead-out portion 22a similarly to the lead-out portion 22b. On the other hand, a lead-out portion 23a is formed above the circuit breaker 21a in a direction orthogonal to the main bus 2, and the line-side disconnector 3a is connected thereto. Further, an L-shaped busbar 25 having an L-shaped cross section having a busbar portion extending downward is connected to the line-side disconnector 3a. A connecting bus bar 24a is horizontally arranged on the L-shaped bus bar 25, and the circuit breaker 21a and the air insulating bushing 12a are connected by this connecting bus bar 24a.

By the way, the connecting busbars 24a and 24b are arranged on the same axis parallel to the main busbar 2 and are connected to each other.
Is provided on the lower side, and the connecting bus bar 24b is provided on the upper side. Both the connecting buses 24a and 24b are arranged on the ground.

(2) Operation and effect of the embodiment In the present embodiment having the above-mentioned structure, the connecting bus bar 24b arranged in the power transmission line B is horizontal with respect to the lead wire 23b above the breaker 21b. And the connection busbar 24a disposed on the power transmission line A is disposed below the connection bus 24b on the power transmission line B, and the connection buses 24a and 24b are both disposed on the ground. Therefore, the conventional pit for embedding the bus bar is not required.
Therefore, the basic construction of the entire gas-insulated switchgear and the construction of the busbar can be greatly simplified. Further, since the maintenance and inspection work of the connecting bus bar can be easily performed on the ground, the work efficiency can be easily increased. Furthermore, since the connecting buses 24a and 24b are arranged above and below on the same axis, the site area of the gas insulated switchgear can be reduced.

(3) Other Embodiments The present invention is not limited to the embodiments described above, and the dimensions, shapes, arrangement directions, etc. of the respective constituent members such as the circuit breaker and the connecting mother ship are appropriately changed. Is possible, for example
It goes without saying that it also includes embodiments in which the circuit breaker is arranged vertically or horizontally.

[0020]

As described above, according to the present invention, the circuit breakers arranged in the adjacent transmission line circuits are arranged on the same side with respect to the main bus, and one circuit breaker and the air insulating bushing are arranged. With a simple configuration in which both the connecting bus bar that connects the circuit breaker and the connecting bus bar that connects the other breaker and the air insulating bushing are placed above and below the ground and on the same axis, the air insulated A gas-insulated switchgear that can reduce the site area and simplify the basic construction and busbar configuration when the two or more wirelines are juxtaposed, and that also makes the busbar maintenance and inspection work more efficient can do.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a side view of FIG. 1 (transmission line circuit B side).

FIG. 3 is a side view of FIG. 1 (transmission line circuit A side).

[Fig. 4] Single wire connection diagram of gas insulated switchgear

FIG. 5 is a plan view of a conventional gas-insulated switchgear.

FIG. 6 is a side view of FIG. 5 (on the side of the transmission line A).

FIG. 7 is a side view of FIG. 5 (on the side of the transmission line B).

[Explanation of symbols]

 1a, 1b ... Main bus bar side disconnecting switch 2 ... Main bus bar 3a, 3b ... Line side disconnecting switch 11a, 11b ... Circuit breaker 12a, 12b ... Air insulating bushing 13a, 13b ... Connection bus bar 21a, 21b ... Circuit breaker 22a, 22b ... Leading portions 23a, 23b ... Leading portions 24a, 24b ... Connecting busbar 25 ... L-type busbar

Claims (1)

[Claims] 1. A main bus and a bus section line are provided,
Two or more air-insulated transmission line circuits are juxtaposed with each other across the bus bar section line, and two adjacent transmission line lines among the transmission line lines are provided with a first line and a first line on the same side of the main bus line, respectively. A second circuit breaker is arranged, and a first air insulating bushing is arranged opposite to the second circuit breaker on the side opposite to the main bus bar arrangement side of the second circuit breaker. A gas-insulated switchgear in which a second air insulating bushing is arranged opposite to the first circuit breaker on the side opposite to the main bus bar arrangement side of the circuit breaker, wherein the first circuit breaker and the first gas circuit breaker are provided. A first connecting bus bar for connecting the middle insulating bushing and a second connecting bus bar for connecting the second circuit breaker and the second air insulating bushing.
The gas-insulated switchgear according to claim 1, wherein the first and second connection buses are arranged above and below the same axis, and both connection buses are arranged on the ground.