Main electrical connection of double-bus disconnecting link section

Abstract

The invention discloses a main electrical connection of a double-bus disconnecting link section. The main electrical connection of the double-bus disconnecting link section at least comprises a double bus, outgoing breakers, a bus tie breaker, outgoing disconnecting switches, section disconnecting switches, bus tie disconnecting switches and bus facilities, wherein the double bus consists of two sections of buses; middles of the two sections of buses of the double bus are respectively sectioned by adopting two section disconnecting switches; the double bus is only provided with the bus tie breaker and the corresponding bus tie disconnecting switches; and both sides of the section of each section disconnecting switch on the double bus are respectively provided with a set of bus facilities. When electrical equipment normally runs by adopting gas insulated switchgear (GIS), the running mode of the electrical equipment is same as that of a double-bus connection. When a section of bus is maintained or an outgoing interval is extended, by operating the section disconnecting switches of the bus, one of sectioned buses can be ensured to normally run, and therefore, the power cut range is reduced, and the power supply reliability is improved.

Description

technical field [0001] The invention relates to a double-bus electrical main wiring in which the bus is segmented by using an isolation knife switch, and belongs to the technical field of double-bus wiring behind GIS equipment. Background technique [0002] In recent years, due to the advantages of compact structure, small footprint, high operational reliability, and small maintenance workload, GIS equipment (gas-insulated fully enclosed combined electrical appliances) has been widely used in power systems and has become one of the mainstream configurations of electrical equipment in my country. . At present, our application, analysis and evaluation of electrical main wiring is based on conventional AIS equipment, and GIS equipment has different operation and maintenance characteristics compared with AIS conventional equipment. The operation and maintenance of the main wiring of the double busbar wiring have a certain impact. [0003] According to the maintenance and operat...

AI Technical Summary

Problems solved by technology

Therefore, for double-busbar wiring, when the interval expansion or busbar overhaul requires a withstand voltage test, the circuit breaker and isolating switch of the incoming and outgoing lines must be turned on, resulting in a complete shutdown of the two sections of the busbar.

For double-bus wiring, a great advantage is that it can ensure the normal power supply of another section of bus during the maintenance and expansion interval of one section of bus; and the operation and maintenance characteristics of GIS equipment itself have resulted in double-bus wiring after the application of GIS equipment. will lose this advantage

If double-busbar double-section wiring is used, although it can ensure that the busbar on the other side of the section runs normally when the busbar on one side of the section is overhauled, but the double-busbar double-section wiring needs to add bus section circuit breakers, bus couplers, For busbar equipment, the investment increases greatly, the secondary protection is also more complicated, and the economy is poor. It is generally used in the case of a large number of incoming and outgoing lines.

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