JPS5972906A - 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] The present invention relates to a gas insulated switchgear, and more particularly to an improvement of a gas insulated switchgear configured with a double bus bar and four bus ties.

[Technical background of the invention]

In recent years, with the increase in demand for electricity in urban areas, gas-insulated switchgears have become widely used for installation in narrow spaces near cities and for harmonizing with the surrounding environment. Also,
Gas-insulated switchgear is becoming increasingly high-voltage and large-capacity, making it even more modular, improving reliability, and simplifying maintenance.

ization is required.

FIG. 1 is a single-line diagram of a gas-insulated switchgear consisting of a line feeder line, a puncture feeder line, and a bus section used in a general large-capacity substation. Line feeder line is bushing BG, lightning arrester AR, grounding device E
L, disconnector DSL.

It is equipped with a breaker CBL and a current transformer CTL, and its side view is shown in Figure 2. In addition, in FIG. 2, BRL indicates a branch bus.

Puncture feeder line is cable head CH, grounding device E
B1L, disconnector CBB, current transformer CTB, disconnector DSB
The side view is shown in Figure 3. In addition, in FIG. 3, BRB I-! A branch bus line is shown.

The bus section is the main bus line nus1. Btrs2. m
Other device E1. B2, current transformer CTI, CT! ', Disconnector D81゜DS', l, Interrupter CBI, CB
2.

This bus section is used when using long homogeneous busbars.
A large number of introduction and lead-out lines are connected in the middle of the bus, and the same system bus itself is divided into multiple parts to balance power as necessary and improve the reliability of the entire substation.〇 [Problems with Background Art] Conventionally, there are three methods for this bus section, which will be described below.The first method is as shown in FIG. 4. FIG. 4 shows the configuration of only one side of the main bus lines BU8J and BU82. Figure 4 Breaker C
B is placed horizontally, and the main bus line B is placed on the installation surface on the operating mechanism side.
USI, the auxiliary bus ABUS 1 is arranged at right angles to the breaker CB, a disconnector DS is provided at the outlet of the main bus BUS 1, and a current transformer is installed between the disconnector DS and one outlet of the breaker. Connect the branch bus line BRI via the switch CT, connect the branch bus line BRJ vertically to the outlet of the auxiliary bus line ABUS 1, and connect the disconnect switch DSI to the upper part of the branch bus line BRJ,
A branch bus BR, 9 is vertically connected to the other outlet of this disconnector DS1 and the breaker CB via a current transformer CT, and a branch is established between this branch bus BRI and the disconnector DSJ on the auxiliary bus side. There is one in which busbars BR4 are connected. In a bus section with such a configuration, the branch busbars BR2, BRJ, and BR4 are used to connect the auxiliary busbar ABU8J and one outlet of the circuit breaker CB, and the connection is made in an almost L-shape. This method has the drawback that it requires unnecessary branch busbars and is not economical.

The second method is the branch bus line BR2 in FIG.

BR,? , There is one in which a branch bus bar corresponding to BR4 is placed horizontally on the same installation surface as the main bus bar, but in this case, the disadvantage is that it is difficult to inspect the inside of the breaker and to pull it out.

A third method is to bend the main bus bar so that branch bus bars are not used, but bending the main bus bar is troublesome, and it is difficult, especially for main bus bars that carry large currents, because the bending diameter becomes large. It has the disadvantage of being.

[Purpose of the invention]

The present invention does not require a branch bus bar connecting the auxiliary bus bar and the outlet of the breaker, is economical, allows for easy internal inspection and pulling out of the breaker, and does not require bending of the main bus bar. The purpose is to provide insulated switchgear.

[Summary of the invention]

In order to achieve the above object, the present invention is such that an auxiliary bus bar is provided at one outlet of a horizontally arranged interrupter so as to be substantially parallel to the main bus bar.

[Embodiments of the invention]

The present invention will be described above with reference to the drawings.

FIG. 5 is a plan view showing an embodiment of the gas insulated switchgear according to the present invention, in which the line feeder line and the puncture feeder line are formed in opposite directions around the main bus bar, and the connection to the transmission tS and the puncture feeder line are formed in opposite directions. This makes it easy to connect to the transformer side.

In the figure, BG is a bushing, BRL is a branch busbar, CBL is a breaker, and DSL is a disconnector, which constitute a part of the line feeder circuit.

Also, CH is the cable head, and BRB is the branch bus bar.

DSBs are disconnectors, and these constitute part of the puncture feeder line.

The bus section is shown in Figure 6 when viewed in the direction of the arrow along the line Vl-Vl in Figure 5, and in Figure 7 when viewed in the direction of the arrow along the line ■-■.
It is configured as shown in the figure. That is, the circuit breaker CBI is arranged horizontally with respect to the installation surface, and has two openings formed at the top and an operating groove tank at one side.

The main bus BUS 1 is arranged on the installation surface of the breaker CB1 on the side where the operating mechanism is located, substantially perpendicular to the breaker CB1, and has an opening at the top. One outlet of a substantially L-shaped disconnector DS1 is connected to the outlet, and a current transformer CTI is connected to the other outlet of the disconnector DS1. A branch bus line BRI is connected between the outlet part and the outlet part. Auxiliary bus ABUSI is connected to the other outlet of circuit breaker CBI via current transformer CT1.
is connected substantially parallel to the main bus line BUS J, and the other end of the auxiliary bus line ABUS 1 is connected to the main bus line BUSJ via a current transformer CTI and a disconnector DS1.

The main bus BUS 2 is also configured in the same way, with a disconnector D82, a current transformer CTz, a branch bus BR', and an auxiliary bus @ABUS! so as to be symmetrical with the main bus BU81. ' Configure. In addition, in FIG. 7, PTJ and PTI are transformers.

Since the bus section is configured in this way, there is a connection between the auxiliary bus ABUSJ and one outlet of the breaker CBI. No branch busbar is required between the breaker and one outlet of the breaker, which is economical. Also, breaker CB1. Since there is no auxiliary busbar or the like in the part of the CB2 that does not have an operating mechanism, maintenance and inspection of the breaker and pulling it out become easy. Furthermore, since there is no need to bend the main bus bar, workability becomes easier.

〔Effect of the invention〕

According to the present invention described above, there is no need for a branch bus bar that connects the auxiliary bus bar and the opening part of the breaker, which is economical, allows for easy internal inspection and pulling out of the breaker, and allows bending of the main bus bar. A gas insulated switchgear that does not require processing can be provided.

[Brief explanation of drawings]

Figure 1 is a single line diagram of a gas insulated switchgear used in a large-capacity substation, Figure 2 is a side view of the line feeder line in Figure 1, Figure 3 is a side view of the puncture feeder line in Figure 1,
FIG. 4 is a side view showing an example of a conventional bus section, FIG. 5 is a plan view showing an embodiment of a gas insulated switchgear according to the present invention, and FIGS. 6 and 7 are respectively shown in FIG. v
It is a view cut along the t line and the ■-■ line and viewed in the direction of the arrow. CB1. CB2...breaker, BU8J, BUS,
? ...Main bus, ABUSz, ABUSz...Auxiliary bus, BRJ, BR2...Branch bus, CT1.
C'r2...Current transformer, D81. DS2...disconnector,
PTI, PTI...Transformer. 3 2nd donkey LIS2 3rd figure 4th figure

Claims (1)

[Claims] A container filled with an insulating gas has a fixed electrode and a movable electrode that can move toward and away from the container in the axial direction of the container, and a first electrode is provided at the top of the container. A breaker that has a second outlet and is placed substantially horizontally with respect to the installation surface; and a breaker that has a second outlet that is substantially horizontal to the installation surface and is located on the operating mechanism side of the interrupter; a main bus bar disposed substantially at right angles to the breaker; a disconnector having a second outlet and connecting the first outlet to the sunrise part of the main bus; and a current transformer connected to the second outlet of the disconnector; A branch bus bar connected between the opening part on the side closer to the operating mechanism of the breaker, and an auxiliary bus bar connected parallel to the main bus bar via a current transformer to the other opening part of the breaker. Gas insulated switchgear.