High-voltage and direct-current quick disconnecting switch

Abstract

The invention discloses a high-voltage and direct-current quick disconnecting switch. The high-voltage and direct-current quick disconnecting switch comprises a sealing tank body, a high-voltage electrode and a low-voltage electrode. Two disc insulators, four moving contacts, four static contacts, four conductive button contacts, five insulating supports, three conducting rods, four operating mechanisms, four keeping units and four buffering units are arranged in the sealing tank body. The moving contacts are driven by the operating mechanisms to make contact with or to be separated from the static contacts. When the moving contacts make contact with the static contacts, the three conducting rods are connected in series so that an electrically-conductive path can be formed between the high-voltage electrode and the low-voltage electrode. When the moving contacts are separated from the static contacts, multiple fractures are formed between the three conducting rods to bear the high voltage between the high-voltage electrode and the low-voltage electrode. The high-voltage and direct-current quick disconnecting switch has the advantages that all the components are arranged in the tank body, the lengths of insulating pull rods are reduced, and therefore loads of the operating mechanisms are reduced, and multi-fracture synchronous rapid separating and combining can be achieved on the premise of the permitted mechanical strength. The high-voltage and direct-current quick disconnecting switch can be applied to 200kV high-voltage situations.

Description

technical field [0001] The invention relates to the technical field of electric equipment, in particular to a high-voltage direct-current fast isolating switch. Background technique [0002] For the multi-terminal DC transmission system, it is necessary for the DC circuit breaker to operate to remove the faults on the DC line and avoid the blocking protection of each converter station in time, so as to ensure that only the faulty line is cut off and the rest of the lines can work normally. With the development of multi-terminal DC transmission systems, DC circuit breakers have become a research hotspot in recent years. Among the currently used hybrid DC circuit breakers, the main component that limits the operating time of the DC circuit breaker is the high-voltage DC fast disconnector. Conventional High Pressure SF 6 The stroke of the AC isolating switch is long, the length of the insulating rod between the moving contact and the operating mechanism is large, and the mass...

AI Technical Summary

Problems solved by technology

Conventional High Pressure SF 6 The stroke of the AC isolating switch is long, the length of the insulating rod between the moving contact and the operating mechanism is large, and the mass of the moving parts is large, so that the load on the operating mechanism is large, and the operating mechanism used is generally a traditional spring operating mechanism , the required operating time is longer, not suitable for high-voltage DC fast disconnectors

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