JP2000050435A - Double bus gas-insulated switchgear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a double bus gas-insulated switchgear which can reduce the area for installation. SOLUTION: In a double bus gas-insulated switchgear, L-type breaker 1a is arranged horizontally, a T-type branch bus is connected to the upper lead wire of the breaker, vertical disconnectors are provided at both sides of the T-type branch bus and are connected to the main bus, the phases of the main buses 4a, 4b are arranged at the apex of an isosceles triangle with the main bus lines 4a, 4b perpendicular to L-type breaker, and therefore, both the height of a building for the substation and the installation area 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 gas insulated switchgear, and more particularly to a double bus type gas insulated switchgear having an improved layout.

[0002]

2. Description of the Related Art An example of a conventional double-bus type substation will be described with reference to the drawings. FIG. 8A is a layout view showing a part of the layout of a conventional substation, FIG. 8B is a view showing a single-line connection, and FIG. 9 is a side view as viewed from a direction CC in FIG. FIG. 10 is a side view as seen from the DD direction in FIG.

In FIG. 8, the conventional layout is such that a power transmission tower 56 of a transmission line is provided on one side of a main bus 54a, 54b, and a transformer 28 and a secondary side transformer circuit 57 are provided on the other side.
Is installed. Therefore, as shown in FIGS. 8 and 9, the circuit breaker 51a installed horizontally is connected to the main buses 54a, 54b installed on the same plane through the connection bus 52 and the disconnector 53 from one outlet side. Then, it is connected to the line circuit 11 via the disconnector 55 from the other outlet.
8 and 10, the horizontally installed circuit breaker 51b is installed on the opposite side of the circuit breaker 51a across the main buses 54a, 54b, and the transformer circuit 12 is connected to the line circuit 11. Are installed in opposite directions.

[0004]

In the conventional gas insulated switchgear arranged as described above, the main buses 54a, 54b
Since the dimension in the direction perpendicular to the direction becomes extremely large, the installation area of the gas insulated switchgear becomes large. In particular, when installed in a building, there is a problem that the building becomes very large. The present invention (corresponding to claim 1) has been made to solve the above problem, and an object of the present invention is to provide a gas insulated switchgear capable of reducing an installation area.

[0005]

Means for Solving the Problems To achieve the above object, a first aspect of the present invention is to provide a gas insulated switchgear orthogonal to a transformer, in which an L-shaped circuit breaker is horizontally arranged, and an upper outlet portion thereof is provided. A T-shaped branch bus is connected to the main bus through disconnectors provided vertically from both sides of the T-shaped branch bus, and the main bus is connected to a vertex of an isosceles triangle in a direction orthogonal to the L-shaped circuit breaker. In which each phase is arranged.

According to a second aspect of the present invention, in a double bus type gas insulated switchgear directly connected to a transformer, a supporting portion of a transformer connecting bus is suspended by a U bolt attached to a fire barrier of the transformer. , Characterized in that it is configured to be slidable in the axial direction of the connection bus.

According to a third aspect of the present invention, in a double bus type gas insulated switchgear, a U-shaped circuit breaker is horizontally disposed, an L-shaped circuit breaker is horizontally provided at an upper outlet thereof, and a connection bus is provided. Each phase of the main bus is arranged at a vertex of an isosceles triangle in a direction orthogonal to the U-shaped circuit breaker.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment of the present invention.
FIG. 2A is a configuration diagram of a double bus type gas insulated switchgear (corresponding), FIG. 1A is a layout diagram showing a part of the layout, FIG. 1B is a connection diagram thereof, and FIG. 1 is a side view as seen from the AA direction, and FIG. 3 is a side view as seen from the BB direction in FIG.

As shown in FIGS. 1 and 2, in this embodiment, a T-shaped branch bus 2 is disposed on the upper exit side of an L-shaped circuit breaker 1a, and L-shaped disconnectors are provided on both sides of the T-shaped branch bus 2. 3a, 3
Main buses 4a and 4b having respective phases arranged at the vertices of an isosceles triangle are arranged in a direction orthogonal to the circuit breaker 1a via the line b.
With this arrangement, the length L1 from the main buses 4a, 4b to the circuit breaker 1a can be reduced, and the installation area of the gas insulated switchgear can be reduced.

As shown in FIGS. 1 and 3, a line line 11 and a transformer line 12 are provided in the same direction orthogonal to the main buses 4a and 4b, and a line line bushing 13 is provided on a substation building roof 14. It is installed parallel to the main buses 4a, 4b. With this arrangement, the length of the transformer line 11 and the line line 12 in the direction orthogonal to the main buses 4a and 4b can be reduced as compared with the conventional arrangement shown in FIG. The installation area of the gas insulated switchgear can be reduced.

[0011] Further, as shown in FIG.
L provided vertically from the horizontal exit portion of a through the connection bus 8
The main buses 4a and 4b are connected to the disconnecting switch 10 and each phase is arranged at an apex of an isosceles triangle in a direction orthogonal to the circuit breaker through a connection bus 31 from an upper exit portion of the disconnecting switch 10. It is connected to the lateral outlet of an L-shaped disconnector 32 arranged horizontally on the same straight line as the base of the equilateral triangle, and connected from the horizontally arranged L-shaped disconnector 32 to one main bus 4b via a connection bus 33. By having the bypass circuit that performs, the dimension in the height direction can be suppressed, and the height of the substation building can be reduced.

FIG. 4 is a structural view of a second embodiment (corresponding to claim 2) of the present invention. FIG. 4A is a side view thereof, and FIG. FIG. 4C is a side view of the support portion, and FIG. 4C is a front view of FIG.

As shown in FIG. 1, in this embodiment, the transformer 2
In the gas-insulated switchgear orthogonal to 8, the connection bus 21
The support part 22 utilizes the firewall 23 of the transformer.
U bolts 24 are suspended by the fire wall 23 of the transformer,
By providing a sliding pad 27 between the connection bus 21 and the U bolt 24, the structure is such that the connection bus 21 can slide in the axial direction. With such a structure, the space below the connection bus 21 can be ensured and can be used effectively.

In the gas-insulated switchgear directly connected to the transformer 28, the pressure-balancing bellows 26 is horizontally installed near the transformer connection bus 25, so that the transformer 28
, And the fluctuation of the base division portion and the thermal expansion and contraction of the connection bus 21 can be absorbed.

FIG. 5 is a block diagram of a third embodiment (corresponding to claim 3) of the present invention, wherein FIG. 5A is a plan view and FIG.
Is a side view. In the drawing, the present embodiment is a U-shaped circuit breaker 1b in the double bus type gas insulated switchgear shown in FIG.
Are arranged horizontally, and an L-shaped disconnector 5
a and 5b are provided in the same direction, and have a bus dividing line connected to the main buses 4a and 4b in which the respective phases are arranged at the vertices of an isosceles triangle in a direction orthogonal to the U-shaped circuit breaker 1b via the connection bus 6. With such a configuration, the dimension in the direction orthogonal to the main buses 4a and 4b can be reduced, and the installation area of the gas-insulated bus can be reduced.

FIG. 6 is a side view of a fourth embodiment (corresponding to claim 3) of the present invention. In the figure, the present embodiment is an L-shaped cut-off device of the double bus type gas insulated switchgear of FIG. 1 through an L-shaped disconnector 7 provided horizontally from an upper outlet of an L-shaped circuit breaker 1a disposed horizontally. Connected to one main bus bar 4a in which the respective phases are arranged at the vertices of an isosceles triangle in a direction orthogonal to the circuit breaker 1a.
And a bus connecting line connected to the other main bus 4b via the Z-shaped connecting bus 10 from the upper outlet of the L-shaped disconnector 9 through the L-shaped disconnector 9. I have. With such a configuration, the dimension in the direction orthogonal to the main buses 4a and 4b can be reduced, so that the installation area of the gas insulated bus can be reduced.

FIG. 7 is a side view of a fifth embodiment (corresponding to claim 3) of the present invention. In this figure, in this embodiment, a T-shaped branch bus 2 is arranged at one outlet of a U-shaped circuit breaker 1b, and U-shaped breakers are provided on both sides of the T-shaped branch bus 2 via L-shaped disconnectors 3a and 3b. Main buses 4a and 4b having respective phases arranged at the vertices of an isosceles triangle are set in a direction orthogonal to the container 1b. Also, U
An L-shaped disconnector 15 installed horizontally is provided at the other outlet of the circuit breaker 1b, and the L-shaped disconnector 15 is drawn laterally from the outlet and connected to a bushing or a transformer (not shown) by a bus bar 16 to connect the line circuit 11 of FIG. Alternatively, the transformer circuit 12 is configured. With such a configuration, the length L2 from the end of the main bus to the line-side disconnector 15 can be reduced, so that the installation area of the gas insulated switchgear can be reduced.

[0018]

As described above, the present invention (Claim 1)
According to claim 3), the height of the substation building and the installation area can be reduced.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a double bus type gas insulated switchgear according to a first embodiment of the present invention. FIG. 1A is a layout diagram showing a part of the layout, and FIG. The connection diagram.

FIG. 2 is a side view as seen from a direction AA in FIG. 1;

FIG. 3 is a side view as viewed from a direction BB in FIG. 1;

4A and 4B are configuration diagrams of a second embodiment of the present invention, wherein FIG. 4A is a side view thereof, and FIG. 4B is a side view of a connection busbar support portion of FIG. (C) is a front view of the same figure (B). FIG. 6 is a configuration diagram of a second embodiment of the present invention.

5A and 5B are configuration diagrams of a third embodiment of the present invention, wherein FIG. 5A is a plan view and FIG. 5B is a side view.

FIG. 6 is a side view of a fourth embodiment of the present invention.

FIG. 7 is a side view of a fifth embodiment of the present invention.

8A and 8B are configuration diagrams of a conventional substation, where FIG. 8A is a diagram illustrating a part of a layout of the conventional substation, and FIG. 8B is a diagram illustrating a single-line connection thereof.

FIG. 9 is a side view as seen from the direction of arrows CC in FIG.

FIG. 10 is a side view as seen from the DD direction in FIG.

[Explanation of symbols]

1a ... L-type circuit breaker, 1b ... U-type circuit breaker, 2 ... T-type bus,
3a, 3b ... L-shaped disconnector, 4a, 4b ... main bus, 5a,
5b: L-shaped disconnector, 6: Connection bus, 7: L-shaped disconnector, 8
... Connecting bus, 9 ... L-shaped disconnector, 10 ... L-shaped disconnector, 11
... track line, 12 ... transformer line, 13 ... line line bushing, 14 ... building, 15 ... L-shaped disconnector, 16 ... drawer bus, 21 ... connection bus, 22 ... support part, 23 ... fire wall, 24 ... U-bolt, 25 ... Transformer connection busbar, 26 ... Pressure-balanced bellows, 27 ... Sliding pad, 28 ... Transformer,
32 L-disconnector, 33 Connection bus, 51a, 51b
Circuit breaker, 52: Connection bus, 53: Disconnector, 54a, 54
b: Main bus, 55: Disconnector, 56: Drop-off tower, 57: Secondary transformer circuit, L1: Length from main bus to L-type breaker, L2: Length from main bus to L-type disconnector Oh.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Shozo Nihei 2-1 Ukishima-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture F-term in the Toshiba Hamakawasaki Plant (reference) 5G017 AA04 BB01 BB20 HH01 JJ01

Claims (3)

[Claims] In a double bus type gas insulated switchgear, an L-shaped circuit breaker is horizontally arranged, and a T-shaped circuit breaker is provided at an upper outlet thereof.
The T-shaped branch bus is connected and connected to the main bus through disconnectors provided vertically from both sides of the T-shaped branch bus, and the main bus is connected to the vertex of an isosceles triangle in a direction orthogonal to the L-shaped circuit breaker. A double bus type gas insulated switchgear, wherein each phase of the main bus is arranged. 2. A double bus type gas insulated switchgear directly connected to a transformer, wherein a supporting portion of a transformer connecting bus is suspended by a U-bolt attached to a fire wall of the transformer, and an axis of the connecting bus. A double bus type gas insulated switchgear having a configuration capable of sliding in a direction. 3. A double bus type gas insulated switchgear, wherein a U-shaped circuit breaker is horizontally disposed, an L-shaped circuit breaker is horizontally provided at an upper outlet thereof, and the U-shaped circuit breaker is connected via a connection bus. A double bus type gas insulated switchgear, wherein each phase of the main bus is arranged at a vertex of an isosceles triangle in a direction perpendicular to the main bus.