JPS6369406A - Gas insulated switchgear - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Field of Application) The present invention relates to a gas-insulated switchgear of a double-bus type, and in particular to a gas-insulated switchgear with an improved part of the switchgear for dividing the busbar. Regarding equipment.

(Prior art) Generally, in large-scale and important substations, gas-insulated switchgear equipped with a busbar division switchgear that separates the main busbars is used in case of an emergency such as an accident or for system reasons. ing. Furthermore, a double busbar is used as the main busbar for reasons such as safe power supply.

Here, FIG. 6 shows a single-line connection diagram of a common double-bus type busbar segment switchgear. That is, there is a switchgear 2 for dividing the busbar between the first and second main busbars 1a and lb.
a and 2b are connected respectively. The busbar segment switching device 2a includes a circuit breaker 3a, disconnectors 4a and 5a connected in series on both sides of the circuit breaker 3a, and a circuit breaker 4a and 5a connected between the circuit breaker 3a and the disconnectors 4a and 5a, respectively. Earthing switches 5a and 7a for inspecting the circuit breaker, and these earthing switches 6a and 7
The current transformers 8a and 9a are respectively inserted between the circuit breaker 3a and the circuit breaker 3a. Similarly, the bus bar division switchgear 2b
The circuit breaker 3b, the disconnector 4b, 5b, the earthing switch 6b,
7b and current transformers 8b and 9b.

In addition, as a switchgear for bus bar division, the
As known from Japanese Patent No. 0406, there is an arrangement shown in FIGS. 7 to 9. That is, the circuit breaker 3a is connected to the first main bus 1a.
and is connected via a connection bus 10a.

Therefore, there is a drawback that the distance between the circuit breaker 3a and the first main bus bar 1a becomes large. If this configuration is applied to a double busbar as it is, the installation area of the busbar division switchgear will become larger. Furthermore, since the first main bus bar 1a is arranged on the same axis with the circuit breaker 3a in between, the circuit breaker 3a needs to have two openings on the same plane. For this reason, the circuit breaker 3a cannot be used in common with a circuit breaker, etc., and must be manufactured exclusively for the busbar section.

Furthermore, as line equipment a for bus bar division, JP-A-60-20
As known from Japanese Patent No. 05, there is an arrangement shown in FIGS. 10 and 11. That is, as described in this publication, the axis of the first main bus 1a is deviated and the axis of the circuit breaker 3a is deviated. For this reason, there is a drawback that maintenance and inspection is inconvenient, and since the first main bus bar 1a is located on the opposite side (two positions) across the circuit breaker 3a, the gas insulated switchgear is
The length of the main generatrix 1a in the axial direction is increased (becomes).

(Problems to be Solved by the Invention) As described above, when using the conventional switchgear for bus bar segmentation, the line for bus bar segmentation and other lines are placed side by side in the axial direction of the main bus bar, so gas insulation is required. There was a drawback that the opening/closing device became larger.

The present invention was made to eliminate the above problems, and
The object of the present invention is to provide a gas-insulated switchgear that can be made smaller by improving the busbar section switchgear part.

[Structure of the invention]

(Means for solving the problem) In order to achieve the above object, in the present invention, a set of main busbars formed by a first main busbar and a second main busbar arranged in parallel are mutually connected. The two main busbar groups are arranged parallel to each other at a predetermined interval, and the ends of each of the main busbar groups are connected by a bus section line, and the one set of main busbar group and the bus section line form a U-shape. is forming.

(Function) With this configuration, the length in the axial direction of the main bus bar can be shortened, and the entire gas insulated switchgear can be downsized.

(Example) An example of the present invention will be described below with reference to the drawings. 1st
As shown in the plan view, the gas insulated switchgear has two main busbars, namely a first main busbar 20a and a second main busbar 20b.
A set of main generatrix lines formed by the above are arranged in parallel and facing each other at a predetermined interval at the top and bottom of the drawing. Then, one end of each of the two main bus groups is connected by a bus division line 30,
Both main busbar groups and the busbar division line 30 form a U-shape when viewed in plan. Further, a power transmission line line 40, a busbar connection line 50, and a transformer line 60 are sequentially connected to both main buses 20a and 20b arranged in parallel and facing each other from the left side in the figure.

All of the circuit breakers for each line are commonly placed vertically and are arranged outside the U-shape, and are provided in a space 70 necessary for inspection etc. inside the U-shape. Furthermore, the outlets of all circuit breakers are directed toward the space 70. Roughly speaking, the gas insulated switchgear is arranged line-symmetrically as a whole.

Next, the configuration of each line will be explained. Power transmission line line 40
The structure is as shown in FIG. 2, which is a cross-sectional view taken along the line ■--■ in FIG. That is, the circuit breaker 43 is a vertical three-phase integrated type and is equipped with a grounding switch 46, as well as three openings 43-1, 43-2.4 on the upper and lower sides of the space of the container.
3-3. Of these openings, the central opening 4
3-2 and the lower opening 43-3 are connected to the first main bus 20a and the second main bus 20b via bus disconnectors 44a and 44b, respectively.

In addition, a disconnector 45, a grounding switch 47, and a cable head 49 are installed at the upper opening 43-1.
It is connected in a direction perpendicular to 0b and toward the space portion 70 side.

Further, the busbar connection line 50 is constructed as shown in FIG. 3, which is a sectional view taken along the line 1--2 in FIG. That is, the circuit breaker 53 includes a grounding switch 56, and connects the first main bus 20a to the opening 53-2 at the center of the container and the opening 53-3 at the bottom through bus disconnectors 54a and 54b, respectively.
and the second main bus 20b are connected. On the other hand, a grounding switch 51 is connected to the upper opening 53-1.

Further, the transformer line 60 is configured as shown in FIG. 4, which is a sectional view taken along the line IV--IV in FIG.

That is, the circuit breaker 63 includes a grounding switch 66, and an opening 63-2 at the center of the container and an opening 63-3 at the bottom.
The first main bus bar 20b and the second main bus bar 20b are connected to each other via bus disconnectors 64a and 64b, respectively. On the other hand, an earthing switch 67 and a cable head 69 are connected to the upper opening 63-1 in a direction perpendicular to both main busbars 20a and 20b and toward the space 70 side.

The bus bar segment switching device constituting the bus bar segment line 3G is constructed as shown in FIG. 5, which is a sectional view taken along the line V-V in FIG. A set of main busbar groups in which the first main busbar 20a and the second main busbar 20b are arranged vertically and horizontally in parallel are arranged in parallel with each other at a predetermined interval. Further, the circuit breakers 33a and 33b connected midway between the first main bus 20a and the second main bus 20b are vertically placed with their operating axes being vertical, and have three openings at the top and bottom of the same side of the container. , are arranged outside the main busbar group so that these protrusions face each other and are at the same height. Roughly speaking, the line connecting the two circuit breakers 33a and 33b and both main busbars 20a,
20b and are mutually orthogonal. Here, the connection on the first main bus 2Oa side is as follows. That is, the first main bus 208G on the left in the figure, the Lffi line disconnector 34
It is connected to the central outlet 33a-2 of the circuit breaker 33a through the breaker 36a, and is connected to the circuit breaker 33a through the switch 36a and then pulled out to the upper outlet 33a-1. The auxiliary bus bar 3 is connected to this outlet 33a-1 via a grounding switch 37a and a disconnector 35a.
Connect 8a. This auxiliary bus bar 38a is connected to the upper opening 3.
The first main bus bar 20 extends vertically downward from the height of 3a-1 to the side of the central opening 33a-2 at one end, and is placed on the side of the central opening 33b-2 of the circuit breaker 33b on the right side of the drawing.
Connect to a. As a result, the first main busbars 20a on the left and right sides of the drawing are connected.

As shown in FIG. 1, this auxiliary bus bar 38a extends linearly in a direction perpendicular to both main bus bars 20a, 20b. On the other hand, the lower opening 33a of the circuit breaker 33a on the left side in the figure
-3 The second main bus bar 20b arranged on the side is the auxiliary bus bar 38
upper outlet 33b of the circuit breaker 33a on the right side in the figure via b
-1 is connected to the disconnector 35b and the earthing switch 37b. The auxiliary bus bar 38b extends from the second main bus bar 20b to a central portion of the second main bus bar 20b, which is arranged vertically below the auxiliary bus bar 38a and parallel to the auxiliary bus bar 38a. Further, the auxiliary bus bar 38b bends horizontally to the side opposite to the power transmission line circuit 40, rises vertically to the height of the upper opening 33a-1, and then bends horizontally again to the power transmission line circuit side, and the auxiliary bus bar 38a
The auxiliary bus bar 38a extends vertically above the auxiliary bus bar 38a and is connected to the disconnector 35b in parallel with the auxiliary bus bar 38. Also,
The left side in the figure is connected to the upper outlet 33b-1 of the circuit breaker 33b on the right side of the figure.

After the second main bus 20b on the side is connected to the earthing switch 36b provided in the circuit breaker 33b via the circuit breaker 33b,
Pull it out from the lower opening 33b-3. This meddling 33b
−3 to the second main bus 20b via the bus disconnector 34b.
By connecting these, the second main busbars 20b on the left and right sides of the drawing are connected.

Regarding the internal structure of the circuit breaker used in this example,
JP-A-60-261311 and JP-A-61-30
It is described in detail in Japanese Patent No. 903, and its explanation will be omitted here.

In the present invention, a set of main busbars formed by both main busbars 20a and 20b are arranged facing each other in parallel with a predetermined interval, and one end of the main busbars is connected by a busbar division line 30, thereby forming a set of main busbars. The main bus group and the bus section line 30 form a U-shape. Thereby, it is possible to provide a gas insulated switchgear in which the axial length of the main busbars 20a and 2Ob can be shortened.

Also, since a space 70 was formed inside the U-shape,
This space 70 can be used as a common inspection space for each line, and a gas-insulated switchgear that does not require a particularly large space in the direction perpendicular to the main busbars 20a, 20b can be provided. Furthermore, all circuit breakers are connected to the main buses 20a, 2
Since they are arranged side by side on the outside of 0b, that is, on the counter-space part 70, the most important equipment, the circuit breaker, can be inspected easily in a short time. And, a circuit breaker 33a used for the bus section line 30
, 33b can be used in common with circuit breakers used for other lines, and product standardization can be achieved without the need for exclusive use of the bus section line 30. In addition, a circuit breaker 33a for the first main bus 2Oa and a circuit breaker 33b for the second main bus 2Ob are installed on the outside of the dual busses 20a, 20b.
The openings 3b are arranged so as to face each other at the same height. Therefore, the circuit breakers 33a and 33b are connected to the main bus 20.
The length in the axial direction of the main generatrices 20a and 20b is shorter than when the main generatrices 20a and 20b are arranged on the same side. Furthermore, since the first main generatrix 20a and the second main generatrix 20b are vertically arranged in parallel,
The distance between them can be reduced.

Furthermore, since the auxiliary busbars 38a and 38b are arranged substantially vertically in parallel in the up-down direction, the installation area of the busbar section line 30 is reduced.

〔Effect of the invention〕

As explained above, in the present invention, a U-shape is formed by one main bus group and a bus section line, so that it is possible to provide a small gas insulated switchgear in which the length in the axial direction of the main bus is shortened. Can be done.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a gas insulated switchgear, not showing an embodiment of the present invention, Fig. 2 is a sectional view taken along the concave section II-II in Fig. 1, and Fig. 3 is a - ■A cross-sectional view of the cross section taken along the arrow, Figure 4 is a cross-sectional view of the IV-IV concave section of Figure 1 taken along the arrow, Figure 5 is a cross-sectional view taken along the V-V cross section of Figure 1, and Figure 6. Figure 7 is a single line diagram of a common double bus type bus bar segment switchgear, Figure 7 is a plan view of a conventional bus bar segment switchgear, and Figure 8 is a diagram of a conventional bus bar segment switchgear.
The figure is a side view of FIG. 7, FIG. 9 is a sectional view taken along the IX-IX cross section of FIG. 8, FIG. It is a sectional view taken along the line XI-XI of FIG. 1a...first main bus bar, 1b...second main bus bar, 2
a, 2b... Switching device for bus bar division, 3a, 3b...
Circuit breaker, 4a, 4b, 5a, 5b--Disconnector, 6a, 6b, 7
a, 7b-41ta open/close! , 10a... connection bus bar, 2
0a...first main bus bar, 20b...second main bus bar,
30... Busbar division line, 33a, 33b... Breaker, 33a-1, 33a-2, 33a-3, 33b-1, 3
3b-2, 33b-3... Outlet, 34a, 34b, 35a, 35b-... Disconnector, 36a
, 36b, 37a, 37b--Earth switch, 38a,
38b... Auxiliary bus bar, 40... Power transmission line circuit, 50...
...Busbar connection line, 60...Transformer line, 70...
Space part, 43... Circuit breaker, 43-1.43-2.43
-3... Outlet, 44a, 44b, 45-... Disconnector, 46.47-... Earthing switch, 49... Cable head, 53... Circuit breaker, 53-1.53-2. 5
3-3--Outlet, 54a, 54b--Disconnector, 5
6, 57... Earthing switch, 63... Circuit breaker, 63-
1.63-2.63-3-0 out, 64a, 64b...
- Disconnector, 66, 67...Earth switch, 69...Cable head. Agent Patent Attorney Noriyuki Ken Yudo Hirofumi Mitsumata Figure 2 Figure 3 Figure 4 a Figure 6 Figure 7 Figure 8 Figure 9

Claims (3)

[Claims] (1) A set of main busbar groups formed by a first main busbar and a second main busbar arranged in parallel are arranged facing each other in parallel at a predetermined interval, and this set of main busbar groups is A gas insulated switchgear in which the respective ends of the main bus bar group and the bus bar segment line are connected to each other by a bus segment line, and the one main bus group and the bus segment line form a U-shape. (2) The gas insulated switchgear according to claim 1, wherein the first main bus bar and the second main bus bar are connected to other lines each having a circuit breaker. (3) The gas insulated switchgear according to claim 2, wherein all circuit breakers used for the bus segment line and other lines are arranged outside the U-shape.