JPH10295008A - Complex gas-insulated electrical energy transformation facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a complex gas-insulated transformation equipment facility whose installation space is reduced and which reduces the number of bushings by a method, wherein a stationary power apparatus is arranged at the lower part of an air bus and a gas-insulated switch gear is connected directly to the stationary power apparatus by using a gas-insulated branch bus. SOLUTION: A bushing 8a is arranged on the side of a transmission-line outgoing port at a gas-insulated switchgear small unit 1a, a bushing 8b is arranged nearly in the same position as an iron structure 5b at a gas-insulated switchgear small unit 1b, and a bushing 8c is arranged in a transformer 7 at a gas-insulated switchgear small unit 1c. A connection part across the gas- insulated switchgear small unit 1b and the gas-insulated switchgear small unit 1c rises upwards, and a gas-insulated branch bus 2 which extends nearly in the horizontal direction towards the transformer 7 from its rise part is led out. The gas-insulated branch bus 2 is connected to the transformer 7 which is arranged at the lower part of an air bus 3. Thereby, the installation space of a complex gas-insulated transformation installation can be reduced, and the number of the bushings 8a to 8c can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combined gas insulated substation, and more particularly to a combined gas insulated substation equipped with a stationary power device and a combined gas insulated switchgear.

[0002]

2. Description of the Related Art As a conventional technique, for example,
As described in 138003, a vertical circuit breaker, a vertical disconnector, and a bushing are arranged in a line, and their connecting parts and lower connecting parts are connected to reduce the site area of the substation. Gas insulated switchgear. Also, JP
As described in JP-A-122305, the height of the unit is reduced by making the left and right two of the three circuit breakers constituting the unit vertical and the central circuit breaker horizontal. There are gas insulated switchgear.

[0003] In these conventional composite gas insulated substation facilities, as shown in FIG. 4, a composite gas insulated switchgear composed of an air bus and a gas insulated switchgear unit, a transformer 7 and a shunt. The devices are arranged separately from stationary power devices such as the reactor 6. The gas-insulated switchgear unit and the transformer 7 or the gas-insulated switchgear unit and the shunt reactor 6 are connected by an aerial wire. In addition, each device and the aerial are connected via a bushing.

[0004]

In the above prior art,
Since the equipment is located separately from the complex gas-insulated switchgear and the static power equipment such as transformers and shunt reactors, there are many parts where no equipment is located under the aerial bus. Since the effective use of the equipment is not planned, the installation area of the equipment becomes large.

In addition, the bushing and the aerial wire connect the gas-insulated switchgear unit and the transformer or the gas-insulated switchgear unit and the shunt reactor, but the cost of the bushing is low. Due to the high cost, the cost of the equipment was increased.

SUMMARY OF THE INVENTION An object of the present invention is to provide a composite gas insulated substation in which the installation area can be reduced and the number of bushings is reduced and the arrangement of the entire substation is considered.

[0007]

In order to achieve the above object, a composite gas insulated substation according to the present invention comprises a stationary power device, a gas insulated switchgear having an insulating gas sealed in a metal container, and a gas insulated switchgear. In a composite gas insulated substation equipped with a gas insulated switchgear and an aerial bus connected via a bushing, the stationary power device is arranged below the aerial bus, and the gas insulated switchgear The static power device is directly connected to a gas-insulated branch bus.

[0008] Also, a composite gas insulating device comprising a gas insulated switchgear in which an insulating gas is sealed in a metal container, and two or more parallel aerial buses connected to the gas insulated switchgear via a bushing. In a combined gas-insulated substation equipped with a switching device and a static power device, the static power device is arranged below the aerial bus, and the gas-insulated switching device and the static power device are It is directly connected by a gas insulated branch bus, and the aerial wire connecting the gas insulated switchgear and the aerial bus via a bushing is routed to a position higher than the aerial bus and connected to the aerial bus. And Further, the static power device is a transformer and a shunt reactor, and at least the transformer is a gas-insulated static power device or a non-combustible transformer insulated with non-combustible oil such as PFC (perfluorocarbon). Further, the static power device is a transformer and a shunt reactor, and at least the transformer is arranged below the air-insulated bus. Further, the gas insulated switchgear is composed of three gas insulated switchgear small units, and the gas insulated branch bus is connected between the two gas insulated switchgear small units on the stationary power device side. It is a branch at.

[0009]

1 to 3 show an embodiment of the present invention.
This will be described below. FIG. 1 is a plan view showing the arrangement of the composite gas insulated substation equipment of the present embodiment, FIG. 2 is a single connection diagram thereof,
FIG. 3 is a side view showing an arrangement of the composite gas insulated substation equipment of the present embodiment.

This embodiment shows an example in which the present invention is applied to a substation equipped with a composite gas insulated switchgear. In this embodiment, four or more sets of gas insulated switchgear units are arranged, each having a three-phase configuration. Is shown. As shown in FIGS. 1 and 3,
A plurality of aerial buses are provided on both sides of the gas insulated switchgear unit 1 so as to extend in the vertical and horizontal directions. One side is connected to a transmission line, and the other side is connected to a transformer 7. Further, iron structures 5 are provided between and on both sides of each bay. One side of the gas insulated switchgear unit 1 is connected to a transmission line, and the other side is connected to a shunt reactor 6. Each gas insulated switchgear unit 1 is linearly arranged in a direction substantially perpendicular to the wiring directions of the aerial bus 3a and the aerial bus 3b. An aerial wire 4a installed at a position higher than the aerial bus 3 almost in parallel with the gas insulated switchgear unit 1
Are supported by the steel structure 5.

As shown in FIG. 2, the gas-insulated switchgear unit 1 includes three gas-insulated switchgear subunits 1a,
The gas-insulated switchgear small unit 1a is installed between the steel structure 5b and the steel structure 5c, and the gas-insulated switchgear small unit 1a is installed between the steel structure 5b and the transmission line outlet side. The device small unit 1c is disposed closer to the transformer 7 than the steel structure 5c. Gas insulated switchgear small unit 1
a, a bushing 8b is provided at substantially the same position as the steel structure 5b of the gas insulated switchgear small unit 1b, and a bushing 8c is provided on the transformer 7 side of the gas insulated switchgear small unit 1c. Are arranged respectively.
The gas insulated switchgear small units 1a, 1b, 1c are each composed of two horizontal disconnectors and horizontal breakers. The high voltage drawer is connected to one side of the horizontal disconnect. The other side of the disconnector is connected to one side of a circuit breaker arranged in a direction orthogonal to the arrangement direction of the bushings via a current transformer. A horizontal actuator is provided on the bushing side of the circuit breaker. The other side of the circuit breaker is connected via a current transformer to one side of the horizontal disconnect. With such a configuration, the installation position of the gas insulated switchgear small unit is lowered, thereby improving the seismic resistance and improving the maintenance and inspection of the current transformer and the like.

The connection between the gas-insulated switchgear small unit 1b and the gas-insulated switchgear small unit 1c is raised upward, and the gas extending substantially horizontally from the rising portion toward the transformer 7 is formed. The insulated branch bus 2 is drawn out, and this gas insulated branch bus 2 is connected to a transformer 7 arranged below the aerial bus 3.

As shown in FIG. 3, the connection between the gas insulated switchgear unit 1 and the transformer 7 is performed by the gas insulated branch bus 2, so that the transformer which has conventionally been required to be installed above the aerial bus 3 is connected. Since the drawing aerial for connecting to the vessel 7 becomes unnecessary, the aerial wire 4a connecting the bushing 8c and the aerial bus 3 is routed above the aerial bus 3 and then connected to the aerial bus 3. It is possible to do. As a result, a space for installing a transformer, a shunt reactor, and the like below the aerial bus 3 can be secured. Since the transformer 7 can be arranged in this space, the installation area of the entire substation equipment can be reduced.

Further, as the transformer 7, a gas insulated transformer and
Applying a non-combustible transformer such as a PFC insulating transformer insulated with non-combustible oil such as PFC (perfluorocarbon) ensures safety even if placed below the aerial bus, so there is little possibility of fire. it can. In particular, when a gas-insulated transformer is applied, the gas-insulated branch bus 2 can be easily connected to the transformer 7 in the same manner as the gas-insulated switchgear unit 1 is connected.

As described above, it has been found that by arranging the non-combustible transformer below the aerial bus, the installation area can be reduced by about 9% in this portion alone as compared with the conventional arrangement.

In the gas-insulated switchgear unit 1 connected to the shunt reactor, a gas-insulated branch bus extending toward the shunt reactor 6 from between the gas-insulated switchgear small unit 1b and the gas-insulated switchgear small unit 1c. 2 are arranged, and the shunt reactor 6 can be arranged below the aerial bus. And, just before the shunt reactor, the gas insulated switchgear small unit 1d can be arranged. Therefore, the arrangement of the steel structure 5b shown in FIG. 4 becomes unnecessary. Thus, by arranging the shunt reactor below the aerial bus, the installation area is reduced by about 10% as compared with the conventional arrangement. As described above, by directly connecting the composite gas insulated switchgear and the static power device with the gas insulated branch bus without passing through the aerial, the static power device can be connected to the aerial bus in the composite gas insulated switchgear. It can be installed under the small area to reduce the installation area. Further, the number of bushings can be reduced and the cost can be reduced by directly connecting with the gas insulated branch bus.

[0017]

In a substation equipped with a composite gas insulated switchgear, the use of a gas insulated bus for connection between the gas insulated switchgear and the transformer eliminates the need for connection by the aerial bus. It can be arranged below the aerial bus. Also, by disposing the non-combustible transformer below the aerial insulated bus, it is possible to reduce the required installation area of the entire substation equipment including the aerial bus. Further, the number of bushings can be reduced and the cost can be reduced by directly connecting with the gas insulated branch bus.

[Brief description of the drawings]

FIG. 1 is a plan view of a composite gas insulated substation equipped with a transformer and a shunt reactor according to one embodiment of the present invention.

FIG. 2 is a single connection diagram of FIG. 1;

FIG. 3 is a side view of the substation equipment of the present embodiment.

FIG. 4 is a plan view of a conventional composite gas insulated switchgear.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Gas insulated switchgear unit, 1a, 1b, 1c ... Gas insulated switchgear small unit, 2 ... Gas insulated branch bus, 3
a, 3b: aerial bus, 4a, 4b: aerial, 5a, 5b
... steel structure, 6 ... shunt reactor, 7 ... transformer, 8a,
8b, 8c ... bushing.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masaki Murashita 1-1-1, Kokubuncho, Hitachi City, Ibaraki Prefecture Inside the Hitachi, Ltd. Kokubu Plant

Claims (5)

[Claims] 1. A composite gas insulation system comprising: a stationary power device; a gas insulated switchgear in which an insulating gas is sealed in a metal container; and an aerial bus connected to the gas insulated switchgear via a bushing. In the substation facility, the static power device is arranged below the aerial bus, and the gas insulated switchgear and the static power device are directly connected by a gas insulated branch bus. Substation equipment. 2. A composite gas insulation device comprising: a gas insulated switchgear having an insulating gas sealed in a metal container; and two or more parallel aerial buses connected to the gas insulated switchgear via a bushing. In a combined gas-insulated substation equipped with a switching device and a static power device, the static power device is arranged below the aerial bus, and the gas-insulated switching device and the static power device are It is directly connected by a gas insulated branch bus, and the aerial wire connecting the gas insulated switchgear and the aerial bus via a bushing is routed to a position higher than the aerial bus and connected to the aerial bus. Combined gas insulated substation equipment. 3. The static power device is a transformer and a shunt reactor, wherein at least one of the transformer and the shunt reactor is a gas-insulated static power device or a PFC.
The composite gas insulated substation according to claim 1 or 2, wherein the non-combustible oil insulated static power device is insulated with a noncombustible oil such as (perfluorocarbon). 4. The combined gas insulated substation according to claim 1, wherein the stationary power devices are a transformer and a shunt reactor, and at least the transformer is disposed below the aerial insulated bus. Facility. 5. A gas-insulated switchgear comprising three gas-insulated switchgear small units, wherein the gas-insulated branch bus is connected between the two gas-insulated switchgear small units on the stationary power equipment side. The composite gas insulated substation facility according to claim 1 or 2, wherein the facility branches off at the connection portion.