JPS6389005A - Portable gas insulated switchgear - Google Patents

Abstract

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

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mobile gas insulated switchgear, and in particular, a gas insulated main bus bar, a plurality of gas circuit breakers, etc. are arranged on a movable bogie frame. This invention relates to a mobile gas insulated switchgear.

[Conventional technology]

In general, gas insulated switchgear (hereinafter abbreviated as GIS) is designed with the assumption that it will be installed in power generation and substations, so it is impossible to simply place it on a single bogie frame. If this arrangement is not done properly, the device cannot be used for transportation. Conventionally, it was called a mobile substation, and all the equipment required for a substation was mounted on a bogie frame supported by tires etc. and movable by a guided vehicle to a desired location.
For example, high-voltage side and low-voltage side switching devices such as circuit breakers, their attached equipment, various equipment such as transformers, instrument transformers, and alternators are mounted and fixed, and electrical connections are made between them. It has also been proposed to configure the system so that power is received from the high-voltage side system and sent to the low-voltage side system. (Unexamined Japanese Patent Publication No. 58-890
(See Publication No. 09, etc.) [Problems to be Solved by the Invention] However, although such mobile substations can be used as an alternative to small-scale substations, it is difficult to achieve even higher voltage and larger capacity. However, there is a problem in that the entire device becomes extremely large and loses its function as a portable device. In order to improve this problem, it may be possible to place the transformer section and the switchgear section such as a gas circuit breaker on separate truck frames and use them as a combination. However, the higher the voltage in the switchgear section, the more difficult it becomes to arrange each device, making it difficult to manufacture it easily.

In addition, since the GIS installed in a substation is usually installed on a foundation surface with few restrictions in terms of width and height, it is possible to configure it for transportation by placing it on a bogie frame as is. I have a problem where I can't.

The purpose of the mobile GIS of the present invention is to appropriately arrange the GIS on the bogie frame so that it can be manufactured without increasing the longitudinal dimension of the bogie frame, and the length of the gas-insulated main bus bar can also be shortened. The purpose is to allow maintenance and inspection of each device to be carried out without any problems.

[Means for solving problems]

In the present invention, on a bogie frame configured to be movable.

A gas insulated main bus bar is arranged in a substantially U-shape consisting of a parallel bus bar portion and orthogonal bus bar portions connected to both ends of the gas insulated main bus bar. At least one vertical gas circuit breaker is installed facing the outside of each orthogonal busbar section, and one end of each type of gas circuit breaker is connected to each opposing busbar section. , the other end is connected to a lead-out terminal.

[Effect]

The gas-insulated main bus bar is formed into a substantially U-shape and placed on the bogie frame, and one vertical gas circuit breaker is placed inside the U-shape, and the remaining vertical gas circuit breakers are placed outside the U-shape. GIS can be appropriately configured on one bogie frame, and the size of the gas-insulated main bus bar can be shortened, and the one bogie frame can be manufactured without increasing the longitudinal dimension.

〔Example〕

FIGS. 1 and 2 showing a mobile GIS which is an embodiment of the present invention correspond to the single line diagram in FIG. 3.

The single line diagram in Figure 3, which is a two-line system, shows the main bus BUS.
As is well known in the art, disconnectors DS are connected to both ends, and one ends of circuit breakers CB1 to CBδ, which are equipped with earthing switches ES, are connected. The other end of the central circuit breaker CB1 reaches a pull-out terminal device such as a cable pend CH having an earthing switch ES on the way, and two circuit breakers CBz on each side of the circuit breaker CBz.

The other ends of CBδ, C84, and C84 are each connected to a bushing BG, which is a lead-out terminal provided with an earthing switch ES in the middle. CT is a current transformer.

In order to configure a mobile GIS using this two-line system, in the present invention, as shown in FIGS. 1 and 2, the bogie frame 10 to be moved by a trailer or the like has a minimum length dimension as described later. Gas insulated main bus 1 and 5 vertical gas circuit breakers 2
A, 2B...2E are appropriately arranged.

The gas-insulated main busbar 1 consists of a parallel busbar portion IA extending parallel to the longitudinal direction of the bogie frame 10, and an orthogonal busbar portion IB formed near both ends of the parallel busbar portion IA to a length corresponding to the number of lines and connected by a flange structure. They are arranged in a substantially U-shape with the minus side open. In a space on the inner circumferential side surrounded by the U-shaped portion of the gas insulated main bus 1, one vertical gas circuit breaker 2A is arranged facing the parallel bus bar portion IA. Furthermore, two vertical gas circuit breakers are arranged at positions facing each of the orthogonal busbar portions IB including the extended ends of the parallel busbar portion IA on the outer peripheral side of the U-shaped portion. By arranging each vertical gas circuit breaker in this way, the small space on the inner circumferential side of the gas insulated main bus 1, whose length has been shortened by bending it into a mouth shape, can be effectively used to create a vertical gas circuit breaker. 2A~
2E can also be used with almost the same structure, and these GI
Maintenance and inspection of the component parts of S can also be carried out in a concentrated manner.

The parallel bus bar portion IA of the gas insulated main bus bar 1 is connected to the lower opening of the vertical gas circuit breaker 2A opposite thereto to connect the internal bus conductor and the interrupting portion, and the parallel bus bar portion IA A terminal device chamber 3 in which a cable head (not shown), which is a lead-out terminal device, is disposed is connected to an upper opening provided on the opposite side, and the cable 4 is drawn out. Similarly to the above, the lower openings of the vertical gas circuit breakers 2B, 2C, 2D, and 2E are connected and electrically connected to each orthogonal bus bar portion IB, and an upper portion is provided in the same direction as the lower openings. A container unit 5 that accommodates a track disconnector 6 and an earthing switch 7 located on the other end side of the interrupter is connected to the opening of the container unit 5 so as to extend in the longitudinal direction of the bogie frame O. Furthermore, since this embodiment is for three-phase use, three bushings 8, each mounted horizontally with an insulation distance, are provided as lead-out terminals in the lead-out terminal container 9, and each bushing is connected to a predetermined line. It is connected by overhead wire.

In the embodiments shown in FIG. 1 and 2, which are two circuits and three-phase all-in-one type, the bushings for each line that is drawn out in the same direction are two bushings 8 for two lines provided in parallel. It is installed symmetrically in a clockwise or counterclockwise direction with reference to

In this way, in the embodiment, bushings are provided in the upper openings of the vertical gas circuit breakers 2B to 2E for each line arranged outside each orthogonal bus bar portion IB, so that
The drawer can be pulled out without any problem in terms of insulation, and since the gas-insulated main bus bar is located at the bottom, it is not only easy to install but also extremely effective for maintenance and inspection. Each bushing may alternatively be provided with a lead-out terminal such as a cable head.

In the embodiment of the mobile GIS shown in FIGS. 1 and 2, the gas-insulated main bus 1 installed on the bogie frame 1o has two vertical lines, including one installed in the opening-shaped space. Although this configuration has five gas circuit breakers, it is clear that it can also be applied to configurations with three gas circuit breakers for one line, and it is not limited to three-phase configurations, but can also be configured for single-phase configurations. It is also possible.

〔Effect of the invention〕

If a mobile GIS is constructed by arranging vertical gas circuit breakers in the space surrounded by the square-shaped gas insulated bus bar and on the outer periphery of the square-shaped part, as in the present invention, the G
It can be used immediately as an IS-equivalent device, and since each vertical gas circuit breaker and gas-insulated main busbar are appropriately placed on the bogie frame, the dimensions of the gas-insulated live busbar can be shortened, and the longitudinal dimension of the bogie frame can be increased. It has the effect that it can be manufactured without any additional work, and that maintenance and inspection of each component of the GIS can be easily performed.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the mobile gas insulated switchgear of the present invention, FIG. 2 is a side view of FIG. 1, and FIG. 3 is a single line diagram of the mobile gas insulated switchgear. 1... Gas insulated main bus bar, LA... Parallel bus bar portion, I
B... Orthogonal bus bar portion, 2A to 2E... Vertical gas circuit breaker. 3...Terminal device room, 5...Container unit, 8...
Bushi High 1st Floor 20 tJS

Claims (1)

[Claims] 1. In a device in which a gas insulated switchgear is placed on a movably configured bogie frame, a parallel generatrix portion extending in the longitudinal direction is provided on the bogie frame, and a parallel generatrix portion of the parallel generatrix portion is provided on the bogie frame. A substantially U-shaped gas insulated main bus bar consisting of orthogonal bus bar parts connected near both ends is arranged, and one vertical gas circuit breaker is placed opposite the parallel bus bar part in the space surrounded by the gas insulated main bus bar. At the same time, at least one vertical gas circuit breaker is installed opposite to the outside of each of the orthogonal busbar portions forming a part of the U-shape, and one end of each vertical gas circuit breaker is connected to the opposite gas A mobile gas insulated switchgear characterized in that it is connected to each busbar portion of an insulated main busbar, and the other end is connected to a lead-out terminal. 2. The mobile gas insulated switchgear according to claim 1, wherein the parallel bus bar portion and the orthogonal bus bar portion of the gas insulated main bus bar are connected to the lower end side of each of the vertical gas circuit breakers. 3. In claim 1 or 2, the gas-insulated main bus bar and each vertical gas circuit breaker are configured in a three-phase package type, and the lead-out terminal of each phase is horizontal from the upper end of the vertical gas circuit breaker. A mobile gas insulated switchgear characterized by being pulled out in the direction. 4. According to claim 1, two vertical gas circuit breakers are arranged facing each other and connected to the outside of each orthogonal busbar portion of the U-shaped gas insulated main busbar. Mobile gas insulated switchgear.