JPH10108327A - Gas-insulated switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten the length of a main bus bar by disposing a plurality of circuit breakers connected to the main bus bar annularly connected along the main bus bar and at the same time radially disposing a power transmission line unit and a transformer unit. SOLUTION: In the case of application to an indoor substation, a main bus bar 1 is annularly formed and disposed in the central part of a house and however, power transmission line units 2, 3, 4 are radially disposed in the main bus bar 1 through a disconnecting switch 19 provided in a plurality of places, and a PT unit 9 for the main bus bar located opposite to the power transmission line unit 2 is disposed. Also, respective transformer units 5, 8 are radially disposed between the power transmission line units 2, 4, and respective transformer units 6, 7 are radially disposed between the power transmission line unit 3 and the PT unit 9 for the main bus bar and between the power transmission line unit 4 and the PT unit 9 for the main bus bar. As a result, since the bus bar length of the main bus bar can be remarkably shortened, the cost of a gas-insulated switch and a house can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a gas-insulated switchgear, and more particularly to a gas-insulated switchgear suitable for installation in an indoor substation.

[0002]

2. Description of the Related Art A gas insulated switchgear has a superior insulation performance as compared with conventional aerial insulated equipment because a current-carrying conductor is arranged in a grounding tank filled with an insulating gas.
Miniaturization is now possible. As a configuration of a conventional gas insulated switchgear, a main bus is arranged in a straight line, and a breaker, a disconnector, etc., which are main devices of each unit of the gas insulated switchgear, are linearly arranged in a direction orthogonal to the main bus. Some are arranged in a shape. Japanese Patent Publication No. 61-38416, Japanese Patent Publication No. 61-38
No. 417, Japanese Patent Publication No. 51-34100,
There is a type in which a transmission line unit and a transformer unit are radially arranged.

[0003]

In recent years, the number of indoor substations and underground substations has increased, and the configuration of the conventional gas-insulated switchgear makes it difficult to configure the equipment due to the shape of the building or the position of the pillars. Increased. In the above-described conventional device, the main devices are arranged in a straight line in a direction orthogonal to the main bus,
When the gas insulated switchgear (abbreviated as GIS for short) becomes too long to be able to cope with the shape of the building, and the units are connected with extra buses in order to avoid pillars and the like, the cost has been greatly increased.

In order to further reduce the cost, it is difficult to reduce the bus length because the size of the main equipment of each equipment is determined by the insulation performance and the current-carrying performance. Needs to be reduced.

[0005] However, the gas insulated switchgear has to be easy to inspect and maintain.
In the conventional configuration, there is a limit in shortening the dimension between units. Japanese Patent Publication No. 61-38416, Japanese Patent Publication No. 61-38417
In Japanese Patent Application Publication No. 51-34100, the transmission line unit and the transformer unit are arranged radially, so that a gas insulation system comprising a plurality of transmission line units and transformer units is provided. In the opening and closing device, there is a limit in shortening the inter-unit size as in the above-described conventional technology.

A first object of the present invention is to provide a gas insulated switchgear which can be installed in an indoor substation or underground transformation.

A second object of the present invention is to provide a gas insulated switchgear having a short main bus length.

A third object of the present invention is to provide a gas insulated switchgear capable of arranging the openings of the cable head in a concentrated manner.

[0009]

In order to achieve the first and second objects, the gas insulated switchgear of the present invention has a main bus connected in a ring shape and a disconnector connected to the main bus is connected to the main bus. A plurality of power transmission units and transformer units are radially arranged via the disconnector while the plurality of power transmission units are arranged along the main bus. Further, at least one of the transmission line unit and the transformer unit is formed by being bent in the middle. Further, a main bus PT unit is connected to the outer peripheral side of the main bus. Further, the transmission line unit and the transformer unit are alternately arranged.

In order to achieve the third object, the gas insulated switchgear of the present invention comprises a plurality of cable lead-out portions arranged concentrically, and a transmission line unit and a transformer unit are radially connected from the cable lead-out portion. And a main bus bar is provided in an annular shape on the outer peripheral side from the cable lead-out portion, and connected to the transmission line unit and the transformer unit via a disconnector. Further, the transmission line unit and the transformer unit include a circuit breaker, and the circuit breaker is arranged outside the main bus.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a plan view of a gas insulated switchgear of the present embodiment, FIG. 2 is a side view of a transmission line unit,
FIG. 3 is a side view of the transformer unit, and FIG.
5 and 6 are plan views of the gas-insulated switchgear of the present embodiment.

This embodiment is an example applied to an indoor substation. As shown in FIG. 1, the gas insulated switchgear of this embodiment has a single bus, three transmission lines, and four transformers. This is an example applied to a gas insulated switchgear of all three phases collectively. 1
Is a main bus, which is usually arranged in a straight line. In the present embodiment, the main bus 1 is formed in an annular shape and is arranged at the center of the building. The main bus 1 is provided with disconnectors 19 at a plurality of locations.
The transmission line units 2, 3, and 4 are arranged radially through the power transmission line unit, and the main bus PT unit 9 is arranged at a position facing the transmission line unit 2. Transformer units 5 and 8 are radially arranged between the transmission line units 2 and 3 and the transmission line units 2 and 4, respectively.
The transformer units 6 and 7 are arranged radially between the power transmission unit 4 and the main bus PT unit 9 and between the power transmission line unit 4 and the main bus PT unit 9, respectively.

The transmission line unit is configured as shown in FIG. A disconnector 19 is installed above the main bus 1,
The disconnector 19 is connected to a lower side of the vertical circuit breaker 18 by a connection portion arranged in a horizontal direction, and is connected to a disconnector 20 above the circuit breaker 18. Is connected to

As shown in FIG. 3, the transformer unit has the same configuration as the transmission line unit. As shown in FIG. 4, the main bus PT unit 9 is connected to the main bus 1 arranged below by a connection portion that is vertically raised, and is arranged below.

Numerals 10 to 17 indicate cubicles.
The transmission line unit, the transformer unit, and the main bus PT unit are provided respectively, and are arranged along the radially arranged transmission line unit, the transformer unit, and the main bus PT unit.

Since the gas insulated switchgear of this embodiment is constructed as described above, the main bus is conventionally arranged in a straight line, and each unit such as a transmission line unit and a transformer unit is connected to the main bus from the main bus. As compared with the gas insulated switchgear pulled out in the orthogonal direction, the bus length of the main bus can be significantly shortened, and the cost of the gas insulated switchgear and the building can be reduced. In recent years, it has been difficult to secure substation sites, and indoor and underground substations have been increasing. There is also. The conventional gas insulated switchgear is not compatible with the installation space of such a building, and requires an extra large building. On the other hand, in the present embodiment, the main bus is formed in a ring shape and arranged in the center of the building, and the units such as the transmission line unit, the transformer unit, and the bus PT unit are arranged radially from the main bus. When applied to an indoor substation or an underground substation, the space can be reduced, and a gas-insulated switchgear particularly suited for a circular building can be provided.

When such an arrangement is adopted, the space between adjacent circuit breakers is widened because the units on the line side are widened, so that carry-out / load-in and maintenance for circuit breaker replacement at the time of handling an accident are performed. Workability such as is improved. or,
Cubicles can be placed between lines to make effective use of the space on the line side. In addition, with respect to operability, the main bus is arranged at the center, so that the disconnector for the main bus is centrally arranged at the center of the gas insulated switchgear, thereby improving workability at the time of on-site operation.

FIG. 5 shows a modification of the embodiment shown in FIG. 1. In the embodiment shown in FIG. 1, cubicles 10 to 17 are arranged along each unit. Then, cubicles 10-17 are replaced by P for main bus.
They are concentrated on the T unit 9 side. in this way,
By intensively arranging the cubicles on the main bus PT unit side, one operation with the cubicles can be performed.

In the above description, the case where the main bus has an arc shape, for example, has been described. However, it is sufficient that the main bus can be formed in a ring shape such as a polygonal shape.

FIG. 6 shows another modification of the embodiment shown in FIG. 1. In this embodiment, each of the transmission line unit and the transformer unit is formed by bending at a connection portion of the disconnector 20 in a right angle direction. ing. With this configuration, the space between the lines can be effectively used, and the space occupied by the gas insulated switchgear can be reduced. Although FIG. 6 shows an example in which both the transmission line unit and the transformer unit are bent, any one of them may be bent.

The gas insulated switchgear of this embodiment can be applied to various building shapes such as a circle and a square.

Another embodiment of the present invention will be described with reference to FIG. FIG. 7 is a plan view of the gas insulated switchgear of the present embodiment.

The gas insulated switchgear of this embodiment has a single bus, three transmission lines, and four transformers, as in the embodiment shown in FIG. 1. As shown in FIG. And the cable lead-out part 21 of the transformer unit is arranged at the center, and the main bus 1 is arranged in a ring shape so as to surround the cable lead-out part 21. That is, in the center part, the cable lead-out portions 21 of the transmission line units 2 to 4 and the transformer units 5 to 8 are arranged concentrically, and a linear transmission line unit and a transformer unit in which the circuit breaker 18 is provided on the outer peripheral side. Are alternately arranged radially, and the main bus 1 is
9 to be connected in a ring shape. Circuit breaker 18
Uses a vertical circuit breaker, and the disconnector 19 is
Is provided below. The annular main bus is
In the present embodiment, as shown in FIG. 7, it is configured in a polygonal shape combining a straight portion and a bent portion. PT for main bus
Unit 9 is arranged at a position facing transmission line unit 2, and is arranged on the outer peripheral side of main bus 1.
The cubicles 10 to 17 are arranged near the circuit breaker 18, respectively.

[0024] With this configuration, the opening of the cable head can be concentrated at the center of the building, and the cable passage can be reduced to one place. Therefore, if a pillar is arranged in the center of the building and a cable tunnel is provided in the center of the pillar, the pillar and the cable tunnel can be shared. As a result, conventionally, since the cable outlets were arranged at various places, it was necessary to provide the outlets separately from the large openings, but according to the gas-insulated switchgear of the present embodiment, the building was Installation can be simplified, and overall costs including the building can be reduced.

[0025]

As described above, according to the present invention,
The bus length of the main bus can be significantly reduced, and the cost of the gas insulated switchgear and the building can be reduced. In addition, since the main bus is formed in an annular shape and placed in the center of the building, and each unit such as the transmission line unit, the transformer unit, and the bus PT unit is arranged radially from the main bus, the indoor substation or underground substation is used. When applied to a place, the space can be reduced, and a gas insulated switchgear particularly suited for a circular building can be provided.

In addition, since the space between the units on the line side is widened, the space between adjacent circuit breakers is widened, and workability such as carrying out, carrying in, and maintenance for circuit breaker replacement at the time of handling an accident is improved. Also, cubicles can be arranged between the lines to effectively utilize the space on the line side. In addition, with respect to operability, the main bus is arranged at the center, so that the disconnector for the main bus is centrally arranged at the center of the gas insulated switchgear, thereby improving workability at the time of on-site operation.

[Brief description of the drawings]

FIG. 1 is a plan view of a gas-insulated switchgear according to an embodiment of the present invention.

FIG. 2 is a side view of the transmission line unit.

FIG. 3 is a side view of a transformer unit.

FIG. 4 is a side view of a main bus PT unit.

FIG. 5 is a plan view of a gas-insulated switchgear in which the cubicle position is concentrated in the modification of FIG. 1;

FIG. 6 is a plan view of a gas-insulated switchgear in which each line is bent in the modification of FIG.

FIG. 7 is a plan view of a gas-insulated switchgear according to another embodiment of the present invention.

[Explanation of symbols]

1 ... main bus, 2, 3, 4 ... transmission line unit, 5, 6,
7, 8 ... Transformer unit, 9 ... PT unit for main bus,
10, 11, 12, 13, 14, 15, 16, 17 ... cubicle, 18 ... breaker, 19 ... disconnector.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Michio Moriya, 1-1-1, Kokubuncho, Hitachi City, Ibaraki Prefecture Inside Kokubu Plant, Hitachi, Ltd. (72) Soji Omori 1-1-1, Kokubuncho, Hitachi City, Ibaraki Prefecture No. 1 Inside the Kokubu Plant of Hitachi, Ltd.

Claims (6)

[Claims] 1. A main bus is connected in a ring shape, a plurality of disconnectors connected to the main bus are arranged along the main bus, and a transmission line unit and a transformer unit are radially connected via the disconnector. A gas-insulated switchgear, characterized in that it is arranged in a gas-insulated switchgear. 2. A plurality of cable lead-out portions are concentrically arranged, and a transmission line unit and a transformer unit are radially arranged from the cable lead-out portion, and a main bus bar is provided annularly on the outer peripheral side from the cable lead-out portion. A gas insulated switchgear connected to the transmission line unit and the transformer unit via a disconnector. 3. The gas insulated switchgear according to claim 1, wherein at least one of the transmission line unit and the transformer unit is formed by being bent halfway. 4. The gas insulated switchgear according to claim 1, wherein a PT unit for the main bus is connected to an outer peripheral side of the main bus. 5. The gas insulated switchgear according to claim 1, wherein the transmission line units and the transformer units are alternately arranged. 6. The gas insulated switchgear according to claim 2, wherein the transmission line unit and the transformer unit have a circuit breaker, and the circuit breaker is arranged outside the main bus.