JPS60180404A - Gas insulated switching device - Google Patents

Abstract

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

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to gas insulated switchgear, in particular:
Regarding improvement of the arrangement of components in gas insulated switchgear that can reduce the occupied area of substations, etc. [Prior art] When the double busbar is configured with a /- circuit breaker system, ``1 circuit of Gakos insulated switchgear is As shown in the single-line connection diagram of FIG. 1, the main bus side circuit breaker l1.2 is connected to the disconnector 6. The intermediate circuit breaker 3 is electrically connected to the main bus-side circuit breaker l via the disconnector 7゜, and the other end is electrically connected to the main bus-side circuit breaker l via the It is electrically connected to the main bus-side circuit breaker via disconnectors 9 and 10.

Between the disconnectors q and g and between the disconnectors 9 and 10 are bushings t for connection to power transmission lines and transformers, respectively; 2. /3
is provided. Because of this configuration, conventionally, as shown in Figures 2A and 2B, circuit breakers /, 2. ．． 3 so that their axes are in a straight line, and disconnector B, 7, g, 9, 10°//
is placed on a straight line parallel to the straight line where the circuit breaker is placed,
It was common to connect them to each other as described above. Note that in FIGS. 2A and 2B, the symbol ``.''

S was not the main bus (it had to be placed at both ends of the aerial bushes connected to the main bus, so it had the disadvantage of requiring a large area for substations, etc.).

[Summary of the invention]

This invention was made in view of the above-mentioned drawbacks of conventional devices, and aims to provide a rational and economical gas-insulated switchgear that can reduce the area occupied by substations, etc. Significant technological progress has been made in equipment, especially in gas circuit breakers, where the phase cut-off points used to be composed of K points are now 7 points, and the ones composed of Hiroshi points are now 2 points. The reduction is achieved to a magnitude of θ%,
Focusing on the situation that is now moving to the stage of practical application, the size of the circuit breaker was reduced by arranging the three circuit breakers in a U-shape.

[Embodiments of the invention]

Hereinafter, the present invention will be described in more detail with reference to the illustrated embodiments.

As shown in FIG. 3A, in the gas insulated switchgear according to the present invention, among the three circuit breakers of the /breaker type for one phase, the main bus side circuit breakers l and h are arranged approximately in parallel. , one end of the main bus-side circuit breaker l is connected to the main bus q via the disconnector 6, and one end of the main bus-side circuit breaker λ is connected to the disconnector //
It is connected to the main bus S via. As shown in Fig. 3B, the phase-separated main bus S has three phases arranged almost horizontally, each of the three phases arranged vertically, and a bus-side disconnector A,
// is connected from between each main bus bar p and t by a connection bus bar /4'. The two main bus-side circuit breakers l and the other ends of the main bus-side circuit breakers placed in parallel are an external connection circuit branch disconnector 71g and a circuit breaker 71g, respectively. , IO are electrically connected to both ends of the other one circuit breaker 1f, that is, the intermediate speed circuit breaker 30, respectively, and the intermediate circuit breaker 3 is the main bus side circuit breaker l, as shown in the figure.

Three circuit breakers/, located almost perpendicular to λ,
, 2.3 are arranged in a U-shape. Furthermore, as is clear from FIGS. 3A and 3B, the busbar side disconnector A,
//, External connection circuit branch 1v "Route device?, II, ?, 1
0 is constructed entirely vertically to reduce the dimensions in the direction orthogonal to the main generatrix. In addition, all the connections of the circuit breaker 1, 2, and 3 with adjacent equipment are branched from the top of the circuit breaker container, so that the intermediate speed t! The connection part at both ends of the ji device 30 and the main f
The connecting point from fl hi da and S to the main bus line of U is almost a straight line. Branch disconnector7. g and te, /
The lead-out busbar from between θ passes between the two circuit breakers /, 2 and reaches the air bushing /, 2, 7.7.

In Figures 3A and 3B, the axial dimension of the main bus bar is determined by the required air insulation dimension A of 7.3 for air bushing for drawer/2, and this dimension is different from the conventional air insulation system for switchgear. It has not changed from the yuai consisting of. 1'' with double busbars: Although the iCB system switchyard equipment increases the number of circuit breakers ρ- compared to a general bus system, it uses ultra-high voltage (system voltage, 2. :lO
j, v,,2? The circuit breakers used in these system I voltages have been able to achieve a high degree of O reduction due to advances in gas insulation technology, as described above. This has been achieved, and with respect to the air bushing/-1°130 required air insulation distance A shown in Figure 3A, the connection part of the intermediate circuit breaker 3 with the instantaneous connection equipment (disconnectors g, q) is drawn out [ - Since the dimension B is reduced to approximately aO% or less, the validity of the equipment arrangement of the present invention is clear.

In addition, in FIGS. 3A and 3B, the main bus bar DA, 3 is illustrated as a phase-separated type, but it may be of a three-phase-contoured type, and the air bushing for external connection circuit/2° is illustrated (FIG. 3B). )
However, this is a configuration that is not related to the gist of the present invention. Furthermore, bushing/2. /,? Either of the
Branch disconnector7. g Or? , 10 may be used, and the other bushing parts may not be connected in the air, but may have a structure in which the connection part Fn is extended to the device to be directly connected.
It is Noh.

[Effects of the Invention] As described above, according to the present invention, the 1-iCB type circuit breaker is arranged in a U shape, and the main busbar is provided at the open end of the U, so that the This has the effect of reducing the size and providing an economical gas insulated switchgear with rational arrangement.

[Brief explanation of drawings]

Figure 1 is a single-line connection diagram showing one circuit of a gas-insulated switchgear in which the double busbar is configured with 14 circuit breakers.
Fig. 2A is a plan view showing an example of a conventional gas insulated switchgear, Figs. 2B and 2B are front views of the one shown in Figs. ZA, and Fig. 3A is a plan view showing an embodiment of the gas insulated switchgear according to the present invention. , FIG. 3B is a front view of that shown in FIG. 3A. /, 2... Main bus side circuit breaker, 3... Intermediate speed hp↑ device, left... Main bus, 4. //...Main bus side disconnect switch,? ,g
, 9, 10...external connection circuit branch disconnector, /, 2. /
J...Air bushing, /F...Connection busbar. In each figure, the same reference numerals indicate the same or corresponding parts. Bill 1 figure 1゜ bill 2A figure 2B figure light 3A figure bill 3B figure

Claims (1)

[Claims] In a gas-insulated switchgear that is configured with a double busbar / circuit breaker system and one of the external lead wires is connected to the air fling, two of the three circuit breakers on the main bus side are They are arranged almost parallel to each other, and the other circuit breaker is connected almost at right angles to the main bus side circuit breaker, so that the three circuit breakers are
The gas insulated main bus bar is arranged in the shape of a letter, and the λ gas insulated main busbars are arranged on the side opposite to the side to which the other one νf circuit breaker of the main bus side circuit breaker is connected. Switchgear.