CN102832560A

CN102832560A - Gas-insulated switchgear

Info

Publication number: CN102832560A
Application number: CN2012101940458A
Authority: CN
Inventors: 宁群峰; 久永和弘
Original assignee: Hitachi Ltd
Current assignee: Hitachi Ltd
Priority date: 2011-06-15
Filing date: 2012-06-13
Publication date: 2012-12-19
Also published as: JP2013005549A

Abstract

A gas-insulated switchgear comprises a main bus; interrupting instruments which are constituted by three interrupting units which are substantially parallel with the longitudinal direction of the main bus and connected in series, wherein each interrupting unit is composed of an interrupter and two circuit breakers which are configured in series and clamp the interrupter; branch buses which branch out from the circuit breakers of adjacent interrupting unit in the interrupting instrument; and auxiliary buses which connect the interrupting unit and the main bus at the outer side end of the interrupting unit located at the most outer side of the interrupting units of the interrupting instruments. Two compositions, which are formed by connecting two interrupting instruments in series in the same direction of the main bus, are provided in parallel. The end parts, opposite to the auxiliary buses, of the interrupting instruments are connected by connecting buses.

Description

Gas insulation opening and closing arrangement

Technical field

The present invention relates to 11/2 breaking means of a kind of gas insulation opening and closing arrangement (below be called GIS), relate in particular to by four blocking appearance (ダイヤメ one タ) and constitute and omit one-sided main bus bar, the gas insulation opening and closing arrangement that the space dwindles is set thereby make.

Background technology

11/2 breaking means is owing to also can impact system under the situation about can't use in a breaker failover or maintenance, thereby reliability is high and be widely used.Usually, under 11/2 breaking means, be provided with a pair of main bus bar in the both sides of three breakers.In patent documentation 1, disclose so that the structure that area dwindles the existing gas insulation opening and closing arrangement that turns to purpose to be set.

In this existing example; Like Fig. 1 of TOHKEMY 2007-202390 communique (patent documentation 1) and shown in Figure 2; With main bus bar 1, three breakers 3～5 being connected between 2 in adjacent two breakers 3, be formed with the disintegration upkeep operation between 4 with space (S1); Further apply flexibly this shared disintegration upkeep operation and use the space; Upper portion in this part is electric voltage equalization to be disposed make insulation derive the branch bar 14,16 that direction is intersected; Even main bus bar 1,2 axially on three breakers 3～5 of configuration, also because the disintegration upkeep operation is shared with the configuration of space and branch bar 14,16, thereby can dwindle the area that is provided with that breaker disposes direction side by side.

Yet, in existing example, exist because of the both sides in the blocking unit are provided with bus to make the big problem of area change that is provided with.In addition, when the disintegration upkeep operation, be difficult to make heavy-duty machinery to carry out operation near breaker.

Summary of the invention

The objective of the invention is to; In the gas insulation opening and closing arrangement that constitutes by four blocking appearance; With the GIS of existing employing 11/2 breaking means likewise; Guarantee under the situation that a breaker stops, when also can use the reliability of GIS without barrier, through only dwindling the area that is provided with of GIS at the one-sided configuration bus that interdicts the unit.In addition, its purpose is, can when the disintegration upkeep operation of breaker, make heavy-duty machinery near breaker, thereby interdict the installation and maintenance operation of unit easily.

GIS of the present invention comprises: main bus bar; The blocking appearance, its through with the length direction almost parallel of three blockings unit and these main bus bars be connected in series and constitute, said blocking unit is made up of a breaker and two circuit breakers clipping this breaker configured in series; Branch bar, the circuit breaker branch of its adjacent blocking unit in the said blocking appearance; Auxiliary bus bar, its outboard end that in the blocking unit that constitutes each blocking appearance, is positioned at outermost blocking unit will interdict the unit and be connected with main bus bar.The structure parallel connection that forms that on the direction identical with said main bus bar, is connected in series of two said blocking appearance is provided with two.Each interdicts appearance and the end auxiliary bus bar opposition side and is connected with linking bus.

The invention effect

According to gas insulation opening and closing arrangement of the present invention, can dwindle erection space through omitting one-sided bus.Through only improving economy at the one-sided bus that is provided with.In addition, through only the one-sided configuration bus can also make heavy-duty machinery that operation uses near the blocking unit near, thereby install easily and upkeep operation.And then, through utilizing the binding bus each blocking appearance linking each other, thereby can construct complicated power-on circuit, GIS can apply in a flexible way.

Description of drawings

Fig. 1 is the vertical view of gas insulation opening and closing arrangement of the present invention.

Fig. 2 be along gas insulation opening and closing arrangement X-X shown in Figure 1 to view.

Fig. 3 is the single-lined diagram of gas insulation opening and closing arrangement of the present invention.

Fig. 4 (a) and Fig. 4 (b) are the power-on circuits under the gas insulation opening and closing arrangement normal operation situation of the present invention.

Fig. 5 (a) and Fig. 5 (b) are that the blocking unit 4 of gas insulation opening and closing arrangement of the present invention stops the power-on circuit under the situation.

Fig. 6 (a) and Fig. 6 (b) are that the blocking unit 7 of gas insulation opening and closing arrangement of the present invention stops the power-on circuit under the situation.

Fig. 7 is the power-on circuit that the blocking

unit

5,7 and 108 of gas insulation opening and closing arrangement of the present invention stops under the situation.

Fig. 8 is the power-on circuit that the blocking unit 4,8,105 of gas insulation opening and closing arrangement of the present invention stops under the situation.

Embodiment

Following with reference to description of drawings GIS structure of the present invention.

[embodiment 1]

As shown in Figure 3, GIS of the present invention mainly comprises: main bus bar 1; Blocking appearance A, B, C, D; Link the binding bus 2 that respectively interdicts appearance A, B, C, D; Branch bar 11a, 11b～14a, 14b;

Auxiliary bus bar

15,16.

The concrete structure of the GIS of Fig. 3 has been shown among Fig. 1.In Fig. 1, blocking appearance A is connected in series three through the length direction almost parallel ground with main bus bar 1 and interdicts the unit and constitute, and this blocking unit is made up of a breaker 3 and two

circuit breakers

9,10 of clipping these breaker 3 configured in series.Link through connection bus 19 between each blocking unit.Blocking appearance B, C and D constitute too.

Said blocking appearance A, B, C, D are connected in series two and the structure parallel connection that forms is provided with two on the direction identical with main bus bar 1.Divide branch bar 11a, 11b～14a, the 14b of branch between the circuit breaker of expenditure adjacent blocking unit in the said blocking appearance, these branch bars are connected with the insulating sleeve (not shown) of load-side and mains side.The structure of branch bar 11a is described with reference to Fig. 2.Branch bar 11a strides main bus bar 1 from insulating sleeve (not shown) top is connected with connection bus 19.Connection bus 19 is connected with breaker 4 with current transformer 20 via metrical instrument.

As shown in Figure 1, constitute the outboard end that is positioned at outermost blocking unit in the blocking unit that interdicts appearance A～D and be connected with main bus bar 1 through auxiliary bus bar 15,16.In addition, each medial extremity that with the end of

auxiliary bus bar

15,16 opposition sides, promptly interdicts appearance A～D that interdicts appearance A～D is provided with and links bus 2, links buses via these and makes and respectively interdict appearance and be electrically connected each other.

At first the energising circuit under all blocking unit normal operation situation is described.Shown in Fig. 4 (a), the electric power of connecting from branch bar 11a is supplied in branch bar 12a via blocking unit 4.In addition, the electric power of connecting from branch bar 11a is supplied in branch bar 12b via blocking unit 3, auxiliary bus bar 15,

blocking unit

6 and 7.

On the other hand, shown in Fig. 4 (b), the electric power of connecting from branch bar 11b is supplied in branch bar 12b via blocking unit 7.In addition, the electric power of connecting from branch bar 11b is supplied in branch bar 12a via blocking unit 6, auxiliary bus bar 15,

blocking unit

3 and 4.

Electrical path under the situation about secondly, blocking unit 4 such as failover being stopped according to Fig. 5 (a) and Fig. 5 (b) describes.Shown in Fig. 5 (a), the electric power of connecting from branch bar 11a can be supplied in branch bar 12b via blocking unit 3, auxiliary bus bar 15, blocking unit 6 and 7.Likewise, the electric power of connecting from branch bar 11a can be supplied in branch bar 12a via blocking unit 3, auxiliary bus bar 15,

blocking unit

6,7 and 8, binding bus 2 and blocking unit 5.

On the other hand, shown in Fig. 5 (b), the electric power of connecting from branch bar 11b can be supplied in branch bar 12a via

blocking unit

7,8, binding bus 2, blocking unit 5.Likewise, the electric power of connecting from branch bar 11b can be supplied in branch bar 12b via blocking unit 7.Thus, can use GIS without barrier.

Secondly, the electrical path that according to Fig. 6 (a) and Fig. 6 (b) blocking unit 7 such as failover is stopped under the situation describes.Shown in Fig. 6 (a), the electric power of connecting from branch bar 11a can be supplied in branch bar 12a via blocking unit 4.Likewise, the electric power of connecting from branch bar 11a can be supplied in branch bar 12b via

blocking unit

4,5, binding bus 2 and blocking unit 8.

On the other hand, shown in Fig. 6 (b), the electric power of connecting from branch bar 11b can be supplied in branch bar 12a via blocking unit 6, binding bus 15, blocking unit 3,4.Likewise, the electric power of connecting from branch bar 11b can be supplied in branch bar 12b via blocking unit 6, auxiliary bus bar 15, blocking

unit

3,4 and 5, binding bus 2 and blocking unit 8.Thus, can use GIS without barrier.

As stated, according to the structure of gas insulation opening and closing arrangement of the present invention, even under the situation that any blocking unit stops, also can likewise use GIS without barrier with the existing GIS of 11/2 breaking means that adopted.Thus, can stable supplying electric power, thus can provide reliability high gas insulation opening and closing arrangement.

In addition, consider under the whole situation of blocking appearance A, B, C, D, because main bus bar 1 and link bus 2 and have the function of round about circuit, therefore, even under the situation that three breaker unit stop, GIS sometimes without barrier also can turn round.Below, according to Fig. 7, Fig. 8 this situation is described.

Fig. 7 representes to interdict the situation that

unit

5,7 and 108 stops.Can be from the electric power that branch bar 11a connects through blocking unit 3 via main bus bar 1, again via being supplied in branch bar 12b through breaker unit 8 after blocking unit 105,104,103, the binding bus 2.

Fig. 8 representes to interdict the situation that

unit

4,8 and 105 stops.Can be from the electric power that branch bar 11a connects through blocking unit 3 via main bus bar 1, auxiliary bus bar 16, again via being supplied in branch bar 12a through breaker unit 5 after blocking unit 108,107,106, the binding bus 2.

As stated, because main bus bar 1 and binding bus 2 have the function of round about circuit, therefore, even also can use GIS neatly because of overhauling to wait under the situation that must stop a plurality of blockings unit.

Thus; According to GIS of the present invention; As clearly illustrating among Fig. 1, main bus bar 1 exists only in the one-sided of blocking appearance A～D, thereby can omit an existing side who is present in the main bus bar of both sides; Therefore, can with erection space narrow down to existing employing 11/2 breaking means GIS about about 3/4ths.Thus, compare, can reduce cost with the existing GIS that main bus bar is set in blocking both sides, unit.

In addition, through adopt the only one-sided structure that main bus bar is set can make operation with heavy-duty machinery near interdicting near the unit, therefore, can make the installation and maintenance operation easy.And then, have the function of round about circuit through making main bus bar 1 and linking bus 2, thereby can use GIS neatly.

Claims

1. a gas insulation opening and closing arrangement is characterized in that, comprising:

Main bus bar;

The blocking appearance, its through with the length direction almost parallel of three blockings unit and these main bus bars be connected in series and constitute, said blocking unit is made up of a breaker and two circuit breakers clipping this breaker configured in series;

Branch bar divides expenditure between the circuit breaker of its adjacent blocking unit in the said blocking appearance;

Auxiliary bus bar, its outboard end that in the blocking unit that constitutes each said blocking appearance, is positioned at outermost blocking unit is connected said blocking unit with said main bus bar,

The structure parallel connection that forms that on the direction identical with said main bus bar, is connected in series of two said blocking appearance is provided with two,

Each interdicts appearance and the end auxiliary bus bar opposition side and is connected with linking bus.