JPS6162304A - 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 with an improved arrangement.

[Technical background of the invention and its problems]

In recent years, as power generation and substations have increased, power supply locations have become more remote from urban areas due to the increase in demand for electricity, and as a result, the routes of large power transmission lines have become limited and have to pass through steep mountainous areas. It's becoming more common. Furthermore, even in the suburbs of cities, it is becoming extremely difficult to acquire land for construction of magnetic transmission stations, etc.

Against this background, the construction sites for power transmission and substations tend to be built on sites with limited topography in mountainous areas, or on the roofs of buildings or in narrow spaces adjacent to them in the suburbs of cities. Therefore, there is an increasing need for switching equipment to be adapted to such topography and installation space.

Incidentally, gas insulated switchgears have recently been adopted in power distribution substations and the like in response to demands for reduction in installation area. However, in limited spaces such as the above-mentioned substations in mountainous areas, and in special environments such as sloping terraced areas, there is a strong desire for an improved gas insulated switchgear.

[Purpose of the invention]

The present invention was made in response to the above-mentioned needs, and effectively utilizes installation space in mountainous and narrow areas.
An object of the present invention is to provide a gas insulated switchgear that can simplify foundation construction and simplify the site for a dispatch substation, etc.

[Summary of the invention]

In order to achieve the above object, the present invention takes advantage of the sloping terraced topography and buildings in mountainous areas, and arranges the main generatrix on a substantially vertical wall surface, and provides substantially horizontal lines above and below the wall surface. It is characterized in that gas circuit breakers, current transformers, etc. are installed on the installation foundation surface, and these devices and the main bus are connected by a gas branch bus.

[Embodiments of the invention]

Examples of the present invention will be explained below. Identical parts in each figure are given the same reference numerals. FIG. 3 is an example of a single line diagram. In the figure, 1-1 is the main busbar, 1-2 is the disconnector, 1-3 is the branch busbar, 1-4 is the earthing switch, 1-2 is the disconnector,
-5 is the current transformer, 1-6)'! 1-7 is a voltage transformer, 1-8 is a lightning arrester, and -9 is a lead-out terminal such as a bushing or a cable end connection.

FIG. 1 is a side view showing a configuration example of a gas insulated switchgear according to the present invention, and corresponds to the single line diagram example shown in FIG. That is, in this embodiment, one side of the live generatrix 1-1 is installed on the substantially vertical wall surface 1-10 of the stepped terrain. In addition, the other of the circuit breakers 1-6, the i-flow switch 1-5, and the main bus 1-1 are installed on the lower, almost horizontal installation foundation surface 1-11, and the lower sunrise part of the circuit breaker 1-6 is connected to the branch bus 1-1. -3 and the respective main buses 1-1 through disconnectors 1-2. On the other hand, the upper almost horizontal installation foundation surface 1-1
2, instrument transformer 1-7, air drawer bushing 1-
9 and lightning arrester 1-8 are installed, and these devices are connected to the upper outlet of the circuit breaker 1-6 provided on the lower installation foundation surface 1-11. 1-4 and a branch bus 1-3.

The gas insulated switchgear with this configuration has the main bus bar installed on the wall surface 1-10 in a stepped terrain, the circuit breaker 1-6 etc. on the lower installation foundation surface 1-11, and the bushing 1-9 etc. on the upper part. Installation foundation 1-12 t is installed and the above-mentioned equipment is connected to each other by branch bus 1-3, so it is usually used for power generation, substations, etc. in areas where horizontal space is limited, such as mountainous areas and narrow areas. This eliminates the need to create a vast horizontal foundation plane for the switchgear, which is a problem when constructing a gas-insulated switchgear, and saves on civil engineering construction materials; it also simplifies the structure that supports the gas-insulated switchgear. By performing installation work on 2,000 upper and lower surfaces simultaneously in parallel, it is possible to significantly shorten the installation period.

In the above embodiment, an example was explained in which each device other than the bushing was configured as a three-phase integrated type, but the same applies to a case where each device is configured as a three-phase separated type. Moreover, although the current transformer 1-5 is arranged between the circuit breaker 1-6 and the branch bus 1-3, it may be unnecessary. Furthermore, grounding switches 1-4 may be placed at various locations depending on the operation of the power generation substation. Also,
The above embodiments can also be applied when arranging and configuring using the walls of a building.

Figure 2 shows a configuration example where there are a large number of circuits, in which the main busbars 2-1 of a multi-bus configuration are installed and fixed on the almost vertical wall surface 2-10 of the stepped terrain, and the lower almost horizontal installation foundation surface 2-10 is installed and fixed. Equipment for one line, such as a horizontal circuit breaker 2-6 and current transformer 2-5, is installed on -11, and equipment for another line is installed on the upper, almost horizontal installation foundation surface 2-12. This is a configuration in which circuit breakers 2-6, etc. are installed. By alternately arranging the other circuits in the above arrangement, it is possible to install a multi-circuit gas insulated switchgear in a narrow mountainous space.

〔Effect of the invention〕

As explained above, according to the present invention, a gas insulated switchgear can be rationally arranged in a limited space such as a narrow installation space in a mountainous area or a place near a city where it is difficult to acquire a large land. , it is possible to provide a highly reliable gas insulated switchgear that can reduce the installation foundation plane.

[Brief Description of the Drawings] Fig. 1 is a side view showing one embodiment of the present invention, and Fig. 2 is a side view showing an embodiment of the present invention.
FIG. 3, a side view showing another embodiment of the present invention, is a typical single-line circuit connection example for one line. 1-1, 2-1...Main bus line! -2.2-2...Disconnector 1-3.2-3...Branch bus 1-4.2-4...Earth switch 1-5.2-5...Current transformer 1 -6.2-6 ... Breaker 1-7 ... Potential transformer 1-8 ... Lightning arrester

Claims (1)

[Claims] In gas insulated switchgear that is filled with insulating gas and constructed into a tubular tank structure, the main bus bar is supported by leveled ground or a nearly vertical wall of a building, etc., and the gas insulated disconnect is electrically connected to this. A gas insulated switchgear characterized in that component devices such as a main bus, a gas insulated branch bus, and a gas circuit breaker are arranged on a substantially horizontal installation foundation provided above and below a wall surface on which the main bus is arranged.