Method and system for testing double-end grounding opening and closing time of high-voltage circuit breaker

Abstract

The coupling current is applied to the grounding wire of a circuit breaker bus side test phase line, and the induction current is detected from the grounding wire of a circuit breaker load side test phase line, so that whether the grounding wire of the circuit breaker bus side test phase line and the grounding wire of the circuit breaker load side test phase line form a loop or not is judged; therefore, the opening and closing action time of the high-voltage circuit breaker can be deduced, and the opening and closing time of the high-voltage circuit breaker in a high-voltage line can be tested. According to the invention, the opening and closing test is carried out on the high-voltage circuit breaker through the coupling current and the induction current, the high-voltage circuit breaker does not need to be separated from the high-voltage line, the opening and closing time test of the high-voltage circuit breaker in the high-voltage line is realized, and the test safety is ensured.

Description

technical field [0001] The invention relates to the field of high-voltage circuit breakers, in particular to a method and system for testing the double-terminal grounding opening and closing time of high-voltage circuit breakers. Background technique [0002] High-voltage circuit breakers shoulder the dual tasks of control and protection in the power system, and their status directly affects the safe operation of the power system. The opening and closing time of the high-voltage circuit breaker not only directly affects the normal opening and closing function and safe operation of the switch, but also relates to the safe switching of other equipment in the system and the level of internal overvoltage. It is of great significance to measure it correctly. [0003] At present, the opening and closing time test method of the high-voltage circuit breaker is: apply a positive power supply to one end of the high-voltage circuit breaker fracture, and the other end of the fracture is...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the defect in the above-mentioned prior art that there is currently no method for measuring the opening and closing time of a high-voltage circuit breaker that has been connected to a high-voltage line, the present invention proposes a method and system for testing the opening and closing time of a high-voltage circuit breaker with double-terminal grounding

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