JPS6315611A - Gas insulated switchgear - 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] "Industrial Application Field" Instrument transformers and current transformers for supply and demand, which are arranged across multiple gas-insulated switchgears, each of which has a switch, etc. housed in an airtight container filled with insulating gas. Concerning the connection conductor of the device.

"Conventional technology" Open r of regular and standby two-line power receiving type used in power receiving substations
! An example of a single line diagram of the j1 device is shown in FIG.

In the case of a switchgear of this wiring type, it is composed of two sets of units: a unit 1 for the line (a) and a unit 2 for the line (b). Line (a) and line (b) have the same connection, and normally one of the lines is in operation, while the other is in a stopped state as a standby line. Each unit 1.2
are a voltage detection device 3, a grounding switch for the power receiving end 4, a disconnector for the power receiving end 5, a lightning arrester 6, a circuit breaker 7, a circuit breaker secondary side grounding switch 8,
Disconnector 9, load measurement disconnector 10, load measurement earthing switch 1
1. It is composed of devices such as an electric wire connection section 13 connected to an external electric wire 12 such as a cable. The types and quantities of the devices that make up each unit 1.2 differ depending on the specifications and are not constant.In some cases, each component device is housed in an independent container, or in some cases several components are housed in a container. There is something I did.

14 is a space necessary to maintain insulation. If insulating oil with excellent insulating properties or SF6 or a mixed gas of SF6 is filled here, it will be extremely effective in downsizing the equipment. Reference numeral 15 denotes a transaction voltage transformer and current transformer (hereinafter referred to as PCT), which is the property of the power company.Two internal current transformers and a voltage transformer (not shown) can handle the power used by power consumers. is being measured.

Since PCTs are generally expensive, they are placed across multiple gas-insulated switchgears and used in common. The equipment in the gas insulated switchgear and the terminals of the PCT are connected by a bus bar.

Note that 18 is a connection portion to a transformer.

``Problems to be solved by the invention'' When removing the PCT for inspection or the like or replacing it with a substitute, it is necessary to remove the bus bar. In addition, in the event of an accident with the bus connected to the PCT or repair of a malfunction in the splitter in each unit, it is necessary to stop power reception, temporarily remove the PCT connection bus, and change the connection, so power is received from two lines, one for regular use and one for backup. However, the power outage time is long, and a work space must be prepared in advance, which increases the occupied area accordingly.

"Means to solve problems" The connecting conductor has a structure that allows it to be easily connected and disconnected from the outside.

"Embodiment and Operation" FIG. 1 shows a single line structural diagram of an embodiment of the switchgear according to the present invention. FIG. 1 shows a unit 21 for one line of a cubicle type switchgear of the normal use and two standby line power receiving type. The configuration of the unit 22 is the same as that of the unit 21, so illustration is omitted. The single line diagram is the same as the conventional one, so it will be omitted, but the number 1 representing the configuration is
．． 2.3... corresponds to Fig. 4.

In FIG. 1, the same equipment as in the case of FIG. 4 is housed in the unit 21, but as in the conventional example, the type and quantity of the housed equipment differs depending on the specifications and is not constant.

Between the unit 21 and the unit 22 are horizontal busbars 16a and 16b1 for connecting the PCT 15, vertical busbars 17a,
17b is provided.

At the ends of the horizontal busbars 16a, 16b, arbitrary straight-line disconnection sections 21a, 21b, 22a, 22b are provided, and rod-shaped outlet sections 1a, 1b, 2a provided on the unit 21 and unit 22 sides are provided. , 2b, which can be brought into contact and separated from each other.

FIGS. 2<a> and 2(b) are structural diagrams of a disconnecting section that allows arbitrary units of a plurality of gas-insulated switchgears to be connected to and separated from each other.

The outlets 1a, 1b, 2a, and 2b are of automatic insertion type, and the effective contact length of the disconnector part is as shown in FIG. Also, the other disconnection section 22a122b has a structure in which it is in an effective contact state, and large-displacement bellows 19a and 19b are used in the container housing the horizontal busbars 16a and 16b, and the PCT15
It is designed to absorb the shrinkage of the container due to the parallel movement of the container.

By moving the PCT 15 parallel to the generatrix, rod-shaped openings 1a and 1b are provided in the units 21 and 22.
Alternatively, it can automatically come into contact with and separate from the outlet portions 2a and 2b. In this case, for example, when removing the PCT15 for verification, etc., if you short-circuit the PCT branch busbar part in the unit that is to be connected and disconnected with a simple disconnector (not shown), it is possible to remove the PCTI5 and perform the verification without power outage. Become. Similar measures can also be taken in the event of a busbar accident.

FIG. 2(b) shows a state in which the units 21, 22 and the PCT 15 are connected.

FIG. 3(a) shows a disconnection section 1 that can be connected and disconnected in another embodiment.
FIG. 2 is a structural diagram showing only the phases, and shows a state in which the units 21, 22 and the PCT 15 are connected to each other.

The bus bar 16a is made into a horizontally movable structure, and the supporting insulators 31a, 31
b and the vertical bus bar 23a, and the tip of the vertical bus bar 23a has a movable contact 32 that can be energized.

The bus bar 16a is connected to the operating mechanism by an insulated operating rod 33, penetrates to the outside of the container by an operating shaft 34, and allows horizontal operation of the bus bar 16a from outside the container by an operating handle 35.

FIG. 3(b) shows the unit 2 being separated from the unit 21.
2 and PCT15 are shown.

"Effects of the Invention" The gas-insulated switchgear and the PCT can be connected, separated, and switched with simple operations, reducing working time and greatly reducing the working space, which has a great effect on improving the reliability of power supply.

[Brief explanation of the drawing]

Figure 1 is a single line connection diagram showing an embodiment of the present invention, Figure 2 (a
), (b), Figure 3 (a>, (b) is a structural diagram that allows arbitrary phases of multiple gas-insulated switchgears to be connected and disconnected, and Figure 4 is a single line diagram showing a conventional example. In the figure, 1a, 1b, 2a, 2b are the instrument transformers 15, current transformers 16a, 16bG, and horizontal busbars 21.22 are the units 21a, 21b, 22a, 22b are the disconnectors.
Takatake Seisakusho Co., Ltd. 1m 2nd concave

Claims (1)

[Claims] In a unit of gas-insulated switchgear that is configured by filling an airtight container with insulating gas such as SF6 gas and storing a switch, etc. inside, an instrument transformer for supply and demand placed across each unit. Regarding the horizontal bus that connects the current transformer and the switchgear, the instrument transformer and the current transformer are electrically connected approximately at the center of the horizontal bus, and a straight line disconnect is provided at both ends of the horizontal bus. A bar-shaped outlet facing the disconnection part is provided on the unit side, and the structure is such that the horizontal generatrix can move toward and away from the disconnection part by moving it in the axial direction from the outside of the container. gas insulated switchgear.