Non-contact spatial high-frequency high-voltage circuit breaker operation characteristics measurement method

Abstract

The invention belongs to the testing field of electric power equipment and discloses a non-contact high-voltage circuit breaker operation characteristic measurement method based on the spatial high-frequency technology. Through collecting change time?points of high-frequency?signals generated by a circuit breaker contact arc when the circuit breaker is switched on and switched off and change time points of switching on and switching off coil voltage when the circuit breaker is switched on and switched off in the power-on condition, measurement of parameters such as switching on and switching off time of the high-voltage circuit breaker, switching on and switching off inter-phase imbalance, and switching on and switching off arcing time of the circuit breaker can be realized quickly, conveniently, safely and in a way in no need of power off.

Description

technical field [0001] The invention relates to a non-contact high-voltage circuit breaker action characteristic measurement method based on UHF signal detection technology. Background technique [0002] High-voltage circuit breakers play a control role in high-voltage circuits and are one of the important components of power equipment. The circuit breaker is used to connect or disconnect the circuit during normal operation. In the case of a fault, the circuit is quickly disconnected under the action of the relay protection device, and the short-circuit current is reliably connected under special circumstances (such as when it is automatically reclosed to the faulty line). Therefore, the normal operation of the circuit breaker is of great significance to the stability of the power system. [0003] According to the statistical data of circuit breakers, mechanical operation failures account for half of all failures of high-voltage circuit breakers, and its operating character...

AI Technical Summary

Problems solved by technology

However, the current method of measuring the operating characteristics of high-voltage circuit breakers has difficulties in power outages. The detection method is contact, and the detection process is relatively complicated. Repeated operations are required during detection, which affects the mechanical life of high-voltage circuit breakers.

[0004] When the circuit breaker is in operation, an arc will be generated, which will cause ablation of the dynamic and static arc contacts of the circuit breaker

Whether the circuit breaker can quickly extinguish the arc is an important parameter of the circuit breaker, but in the current conventional detection technology of circuit breakers, there is no effective detection method for it

Images