JPH08298707A - Gas insulated substation - Google Patents

Abstract

PURPOSE: To miniaturize a gas insulation substation which effectively utilizes a building space for the substation by arranging all gas insulators at a high- voltage side on a first floor and all main buses at the high-voltage side on a floor which is different from the first one. CONSTITUTION: An equipment 7 at the road side from all gas-blast circuit- breakers 2 and 2' at the high-voltage side of a gas insulation switcher is arranged on the same floor surface as the gas-blast circuit-breakers 2 and 2' and a first floor and a bus side equipment 8 is arranged on an upper floor. Then, the line side equipment 7 and the bus side equipment 8 are connected by the gas-blast circuit-breakers 2 and 2' which also play the role of a tie line bus. Further, a main bus 12 for connecting through an upper-floor floor surface is withdrawn toward a lower floor and is connected to a gas-blast circuit-breakers 10 for transformer and hence a transformer 4, thus effectively utilizing a building space for substation and miniaturizing a gas insulation substation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indoor type gas-insulated substation, in which the space of the gas-insulated switchgear is saved to effectively utilize the substation building space, and the substation structure is reduced.
The present invention relates to an indoor-type gas-insulated substation that allows the placement of a gas-insulated switchgear that can be easily inspected and maintained.

[0002]

2. Description of the Related Art An ultra-high voltage system is being introduced into central Tokyo to meet the increasing demand for electric power in urban areas. or,
In order to improve the reliability of these systems, multiple circuits are being used. Substations of these systems will be large-scale, but due to the severe land conditions in urban areas, they will take the form of underground substations that are installed underground in high-rise buildings. Underground substations are significantly limited in floor space and occupied space compared to open substations above ground. Furthermore, the construction cost per unit floor area will be much higher than that of an open substation on the ground. Therefore, except for the low voltage class of the distribution system, as shown in FIG. 10, a gas insulated switchgear (hereinafter referred to as GIS) 1 is applied to the switchgear of the underground substation. The GIS is composed of a gas circuit breaker (GCB) 2, a main bus 3, a disconnector 5, a grounding device 6, and the like. The miniaturization of underground substations has been promoted exclusively by the miniaturization of GIS. However, recent technological development has advanced to 550 kVGGCB by cutting to one point, and main bus line 3 has been integrated into three phases up to 500 kV. In addition, in order to improve the supply reliability, as shown in FIG. 11, in addition to the line GCB2, the main bus line 3 is duplicated and the accompanying bus line connection GCB11, the transformer GCB10 are arranged, and multiple lines are used. Tend to change.

[0003]

In the above-mentioned prior art, it is difficult to reduce the size of the GIS drastically, and the size of the GIS is rather increased by duplicating the busbars and increasing the number of lines in order to improve the reliability of supply. This was a big problem in the case of underground substations, which tended to have a significant restriction on the building floor area.

Further, in the GIS 1 itself, the height of the GCB 2 is the highest as shown in FIG. 10, and the height of the GIS 1 is determined on the basis of this height. This height is GCB2
Since it has a close relationship with the insulation and breaking performance of the above, it is difficult to reduce it significantly with the high voltage and large capacity GCB2. Further, since the bus bar is a heavy structure, it must be placed on the floor surface, which is a factor that limits the degree of freedom in GIS1 configuration. These points are G
It was a factor that hindered the miniaturization of IS, the floor area, and the effective use of space. An object of the present invention is to miniaturize a gas-insulated substation by effectively utilizing the building space for the substation by considering miniaturization of the gas-insulated substation from the viewpoint of GIS and the construction of the substation building.

[0005]

In order to achieve the above object, the present invention provides a gas-insulated substation equipped with a plurality of gas circuit breakers, gas-insulated main buses, and gas disconnectors, in which all the gases on the high-voltage side are connected. In the gas-insulated substation, the circuit breaker is arranged on the first floor, and all the main buses on the high voltage side are arranged on a floor different from the first floor.

[0006]

[Function] Conventionally, in the GIS1, when the GCB2 is arranged vertically, the height of the GCB2 is the highest, and the height of the GIS1 is determined on the basis of this height, and the height of the building to be housed is determined independently of other uses. Paying attention to the fact that it was unavoidable, the building to be housed has a two-story hierarchical structure, and the GCB2 is a hierarchical branch point of the GIS1 structure.
The line side equipment and bus side equipment of GIS1 are arranged on different floors with respect to B2, and by vertically arranging GCB2 so as to penetrate this floor, GCB2 secures the necessary and sufficient height for its performance. However, by arranging each device on different floors, the degree of freedom in the configuration is increased, and each device can be downsized and the installation area can be reduced. Can be shared. In addition, since the bus bar can be arranged on the upper floor, the degree of freedom of arrangement of the entire GIS structure is increased. And in these floor arrangements,
In particular, it is possible to save space because there is no need to add a bus bar for communication.

As is clear from the above description, the floor referred to here not only supports and fixes the GIS 1, but also serves as a passage and secures a space other than the arrangement portion of the GIS 1 if necessary. It refers to the floor surface where it is possible.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS This embodiment will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention, in which GIS
The device 7 on the track side from the GCB2, 2'of
This is an example in which it is arranged on the same floor as 2'and the busbar side device 8 is arranged on the upper floor. Then, the track side equipment 7 and the bus side equipment 8 are connected to each other by the GCBs 2 and 2'which also serve as communication bus bars. Further, the connecting bus bar 12 is drawn through the floor surface of the upper floor to the lower floor, connected to the transformer GCB 10 and connected to the transformer 4.

With such a configuration, each device may be miniaturized by its own arrangement, and the space which was conventionally a single floor can be used as two floors.
Increased floor space available. In the embodiment of FIG. 1, the control room 1
3 is placed on the newly available floor. This space can accommodate other GIS equipment, and can be used for equipment other than substation equipment, garages, and warehouses to improve the efficiency of use of the entire building.

In FIG. 2, the track-side device 7 and the bus-side device 8 are
This is an example in which it is placed on the same side with respect to CB2. If the track-side device 7 and the bus-bar side device 8 have a three-dimensional structure, the floor area can be reduced, but maintenance is difficult because the track-side device 7 and the bus-bar side device 8 are stacked. Further, since the bus-side device 8 which is originally long is a heavy object and has to be arranged on the floor surface, it is necessary to make the track-side device 7 having the upper peripheral configuration higher than necessary.

The embodiment of FIG. 2 solves each of these problems. Since the total length is determined by the length of the bus-bar side device 8, the total length can be shortened as compared with the conventional one. In addition, since each device is placed on the floor, maintenance and inspection is easy.

The embodiment shown in FIG. 3 has a structure in which the occupation rate of the floor surface is further reduced, and the dual main busbars 3 are arranged vertically. By arranging in this way, the installation area of the busbar side device 8 can be reduced by almost half. If such a configuration is to be implemented in the conventional example as shown in FIG. 10, it is necessary to add a new connecting bus bar between the GCB and the bus bar, and the space saving effect does not occur. The embodiment of FIG. 4 has a configuration in which the height of the upper bus bar is minimized, and the head of the GCB 2 is arranged so as to project through the floor between the two main bus bars 3a and 3b. It is a structure in which they are in contact with each other on the side. It is possible to save space as a whole by the configuration of other equipment on the upper floor.

FIG. 5 is an explanatory view of the portion of the transformer GCB 10 shown in FIG. 1. When the main bus 3 has the same floor, the line GCB 2 and the transformer GCB 10 cannot be arranged in a straight line, and the axis line is not arranged. Therefore, the length of the main bus bar 3 becomes long and the occupied area becomes large.

In the embodiment of FIG. 5, by disposing the main bus 3 on the upper floor, conductors can be drawn out from above and below the main bus 3, and the line GCB 2 and the transformer GCB 10 can be arranged in a straight line. As shown in the plan view of FIG. 6, the floor occupying area can be halved.

In the embodiment of FIGS. 7 and 8, as described in FIG. 11, the double main bus 3 is provided with the bus bar connecting GCB 11 for connecting the bus bars at one or more places. It is also necessary to save space in this configuration. In the embodiment shown in FIG. 7, one of the main busbars 3a has a connecting busbar drawn from the bottom, as in FIG. The embodiment shown in FIG. 8 is a GCB 11 for connecting to a bus.
Is an example in which the connecting portions are arranged horizontally on the lower floor of the main bus bar 3 and the connecting portions are drawn out from the lower side of both main bus bars. With such a configuration, the occupied area can be further reduced. By arranging the main bus 3 on the upper floor in this way, it is possible to reduce the size and space of the GIS as a whole. In the embodiment of FIG. 9, the vertically arranged GCB installed on the lower floor is also supported on the upper floor.
It is effective in further improving the earthquake resistance of CB.

[0016]

According to the present invention, in an indoor type gas-insulated substation, the building to be housed has a hierarchical structure of at least partially a two-story structure, and the GCB is a hierarchical branch point of the GIS structure with respect to the GCB. GIS track side equipment and bus side equipment are placed on different floors with GCB as a branch point, and
By arranging B so that it penetrates this upper floor, G
The CB secures the necessary and sufficient height in terms of its performance, and by arranging each device on different floors, the degree of freedom in the configuration increases, and each device can be downsized and the installation area can be reduced. Also, it is possible to share the empty space on each floor with other uses. In addition, since the bus bar can be arranged on the upper floor side with respect to the GCB, the degree of freedom of arrangement of the entire GIS structure is increased. Moreover, in these hierarchical arrangements, it is not necessary to additionally install a connecting bus bar, so that it is possible to reduce the size and space. Furthermore, it has excellent earthquake resistance and is easy to maintain.

[Brief description of drawings]

FIG. 1 is a GIS configuration diagram of an embodiment of the present invention.

FIG. 2 is a block diagram showing a different embodiment of the present invention in which each device is hierarchically arranged.

FIG. 3 is a diagram showing another embodiment of the present invention in which bus bars are vertically arranged.

4 is a different embodiment of the present invention, GCB between the busbars
It is a block diagram which arranged.

FIG. 5 is a block diagram showing a different embodiment of the present invention in which a line GCB and a transformer GCB are linearly arranged.

FIG. 6 is a plan view of FIG.

FIG. 7 is a different embodiment of the present invention, a busbar connection GC.
It is a block diagram which made B the vertical type.

FIG. 8 is a different embodiment of the present invention, a busbar connection GC.
It is a block diagram which made B horizontal.

FIG. 9 is a diagram showing a different embodiment of the present invention, in which the circuit breaker is supported and fixed on the upper floor.

FIG. 10 is a GIS configuration of a conventional indoor substation.

FIG. 11 is a busbar connection configuration example of a substation.

[Explanation of symbols]

1 ... Gas insulated switchgear (GIS), 2, 2 '... Gas circuit breaker (GCB), 3 ... Main bus bar, 4 ... Transformer, 5 ... Disconnector,
6 ... Grounding device, 7 ... Track side equipment, 8 ... Bus side equipment, 10
... GCB for transformer, 11 ... GCB for busbar communication, 12 ... communication busbar, 13 ... control room.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsuhiko Shiraishi 7-2-1, Omika-cho, Hitachi-shi, Ibaraki Hitachi, Ltd. Electric Power and Electric Development Division (72) Inventor Yoichi Oshita Omika, Hitachi-shi, Ibaraki 7-2-1 Machi, Ltd. Electric Power & Electric Development Division, Hitachi, Ltd.

Claims (9)

[Claims] 1. A gas-insulated substation comprising a plurality of gas circuit breakers, a gas-insulated main bus, and a gas disconnector, wherein all the gas circuit breakers on the high-voltage side are arranged on a first floor,
A gas-insulated substation, wherein all the main buses on the high-voltage side are arranged on a floor different from the first floor. 2. A gas-insulated switchgear comprising a plurality of gas circuit breakers, a gas-insulated main busbar, and a gas disconnector, wherein the main busbar is arranged on an upper floor and the gas circuit breaker is vertically arranged on a lower floor. A gas-insulated switchgear, characterized in that it is arranged and the upper outlet of the circuit breaker and the main bus are connected. 3. The gas-insulated switchgear according to claim 2, wherein at least a part of the components of the gas-insulated switchgear arranged on the lower floor is of the projection plane of the component on the upper floor. A gas insulated switchgear located downstairs. 4. The gas-insulated switchgear according to claim 2, wherein the main busbar is a double busbar and two busbars are arranged vertically. 5. A gas-insulated switchgear comprising a plurality of gas circuit breakers, a gas-insulated main busbar, and a gas disconnector, wherein the main busbar is arranged on an upper floor and the gas circuit breaker is arranged on a lower floor. ,
A gas-insulated switchgear characterized in that a conductor extending from the main busbar extends from a lower part of the main busbar through the upper floor to a lower floor. 6. The gas insulated switchgear according to claim 5, wherein the lead conductor penetrating the upper floor and branching to the lower floor is connected to a circuit breaker for a transformer. 7. The gas-insulated switchgear according to claim 5, wherein the lead conductor penetrating through the upper floor and branching to the lower floor is connected to a busbar breaker. 8. The main busbar according to claim 2, wherein a double busbar is horizontally arranged, and a head of a circuit breaker disposed on a lower floor between the main busbars penetrates an upper floor surface. A gas-insulated switchgear, characterized in that both main buses are connected to a conductor protruding from the upper floor and drawn from the head of the circuit breaker. 9. A gas-insulated switchgear comprising a plurality of gas circuit breakers, a gas-insulated main bus, and a gas disconnector, wherein each device is arranged on the upper floor and the lower floor, and the gas circuit breaker is arranged on the lower floor. Is arranged vertically, and the circuit breaker is supported and fixed on the upper floor as well.