JPS59204407A - Receiving substation facility - 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 [Field of Application of the Invention] The present invention relates to power receiving and substation equipment in which a gas insulated switchgear and a transformer are directly connected by a gas insulated busbar in a power receiving substation.

[Background of the invention]

Generally, power receiving and transforming equipment in which a gas insulated switchgear and a transformer are directly connected through a gas insulated bus bar is known.

However, if an accident occurs or inspection is required in the gas-insulated switchgear among these devices, it will take a lot of time and result in a power outage. Although it varies depending on the circuit configuration,
In the worst case, it may take about a week to recover.

[Purpose of the invention]

An object of the present invention is to provide power receiving and transforming equipment that can resume operation in a short time even if an accident occurs in a gas-insulated switchgear.

[Summary of the invention]

The present invention is configured so that a power transmission line and a transformer can be connected by bypassing a gas insulated switchgear, and for this purpose, the power transmission line and the gas insulated switchgear are connected by a cable, and the gas insulated switchgear of the cable is connected by a cable. The present invention is characterized in that the cable side has a detachable connection part, and the connection part of the cable is configured in advance on a gas insulated bus bar between the gas insulated switchgear and the transformer.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, a power transmission line 1 is tied to a detention tower 2 and connected to an upper terminal of a bushing 3. The lower terminal of the bushing 3 is led out by a cable 4. The other end of the cable 4 is connected to a gas insulated switchgear. The gas insulated switchgear includes a disconnector 5, a breaker 6, and a disconnector 7. The disconnector 7 is connected to a gas insulated bus 9 via an MOF 8, and the gas insulated bus 9 is connected to a transformer 10.

A fixed side cable connection portion 11 is provided in advance in the middle of the gas insulated bus bar 9. The connection part of the cable 4 is a movable cable connection part 12 which is the end of the cable 4, and a disconnector 5.
It consists of a fixed side cable connection section 13 on the side.

Details of the connection portion of the cable 4 are shown in FIG. The disconnection section is a mover 1 that is opened and closed by an operating device (not shown).
4 and a stator 15. Container 1 of disconnector 5
6 is hermetically sealed by a lid 17, and one end of an epoxy insulator tube 18 is fixed to the inner surface of this lid 17. A terminal 19 is airtightly attached to the other end of the epoxy insulator tube 18, and the stator 15 at the disconnection section is supported by this terminal 19. Furthermore, a tulip-shaped contact 20 is attached to the inside of the terminal 19. A cover 21 is provided on the outer surface of the lid 17.
is removably attached by a bolt 22,
Inside the cover 21 is a push pipe 23 which tightly fits the premolded insulator 24 into the epoxy insulator tube 18. Furthermore, pre-molded insulator 2
A cable 4 is fixed to the center of the cable 4, and a terminal 25 fixed to the end of the cable 4 is a tulip-shaped contact 20.
is connected to the terminal 19 and the disconnection section. When the cover 21 is removed, the push pipe 23, pre-molded insulator 24, and cable 4 are integrally removed so that they can be removed as one unit.

Next, the fixed i'llll cable connection section 11 will be explained with reference to FIG.

The structure of the fixed 111!1 cable connection section 11 is the same as that in FIG. 2, and the same parts are given the same reference numerals and their explanation will be omitted.

A four-edge conductor 30 arranged in a container 32 of a gas insulated bus bar 9
electrically connects the disconnector 7 and the transformer 10,
The conductor 30 and the terminal 19 are constantly connected by a tulip-shaped contact 31. Furthermore, a potential adjustment adapter 33 is fitted as a component corresponding to the movable side cable connection section 12 shown in FIG. This adapter 35 is removably attached to the lid 17 by the cover 21,
A pre-molded insulator 24 for potential adjustment is fitted into the epoxy insulator tube 18 and held by a push pipe 23.

If you wish to disconnect the gas-insulated switchgear now, stop the operation of the system and connect the movable side cable connection part 1 of cable 4 as shown in
from the fixed side cable connection part 13. At the same time, the fixed side cable connection section 11 from which the adapter 35 in FIG.
The movable side cable connecting portion 12 of the cable 4 is inserted into and connected. Since it is the circuit breaker 6 that requires inspection in the gas-insulated switchgear, leave the circuit breaker 7 open,
Operation can be restarted by connecting the power transmission line 1 and the transformer IO via the cable 4. The backup breaker used at this time is a power breaker connected to the power transmission line.

Incidentally, if it is considered that the entire disconnector 7 is inspected, a disconnection device may be provided between the disconnector 7 and the structure shown in FIG. 3, and insulation can be ensured with this disconnection device for restarting the operation.

〔Effect of the invention〕

As described above, the present invention provides a gas insulated switchgear and a transformer 10.
Configure the fixed side cable connection to the gas-insulated busbar between the
Since the cable connected to the gas-insulated switchgear is detachable, even if it becomes necessary to disconnect the gas-insulated switchgear, operation can be resumed in a short time by changing the cable connection.

[Brief explanation of drawings]

FIG. 1 is a front view of power receiving and transforming equipment according to an embodiment of the present invention;
2 and 3 are enlarged cross-sectional views of different main parts of FIG. 1, respectively. 1... Power transmission line, 3... Bushing, 4... Cable, 5... Disconnector, 6... Breaker, 7... Disconnector, 9... Gas insulated bus bar, lO. ...Transformer, 11.
13... Fixed side cable connection part, 12... Movable side cable connection part, 35... Adapter.

Claims (1)

[Claims] 1. In a gas insulated switchgear in which one end is connected to a power transmission line and the other end is connected to a transformer by a gas insulated bus bar, the connection between the power transmission line and the gas insulated switchgear is detachable from the gas insulated switchgear. A power receiving and transforming facility characterized in that the power receiving and transforming equipment is connected by a cable having a movable side cable connection part, and is provided with a fixed side cable connection part to which the movable side cable connection part is detachably connected to the gas insulated bus bar.