Fault Simulation of High-Voltage Circuit Breaker in Low-Temperature Environment

doi:10.11930/j.issn.1004-9649.202211047

Abstract

Abstract: High-voltage circuit breaker is important for power system, whose failure will affect the safe and stable operation. Low-temperature environment would impact the breaking performance of circuit breakers. In order to study the influence of low temperature on circuit breaker fault detection, the hydraulic spring mechanism and opening/closing coil model were established. The effects of low-temperature and opening/closing coil faults on opening/closing time and coil current were simulated and analyzed. The fault simulation experiment platform in low-temperature environment was set up. A large number of fault simulation experiments were carried out under different low-temperature levels. The opening/closing time, opening/closing coil current and marginal spectral energy of vibration signal were taken as characteristic parameters. The variation laws of the characteristic parameters were analyzed. It is revealed that the low-temperature environment affects the breaking performance of the circuit breaker. The opening/closing time of the circuit breaker increases with the decrease of temperature. The temperature has little effect on the coil current. Meanwhile, the marginal spectral energy of vibration signal barely changes below –10 ℃. The results of this paper provide references for the fault diagnosis of circuit breakers in low-temperature environment.

Key words: high-voltage circuit breaker, low-temperature environment, fault simulation, opening/closing coil current, opening/closing time, vibration signal

ZHANG Jian, ZHANG Peng, XU Hui, GONG Mingchen, WANG Yue, ZHANG Jing. Fault Simulation of High-Voltage Circuit Breaker in Low-Temperature Environment[J]. Electric Power, 2023, 56(5): 153-162.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202211047

https://www.electricpower.com.cn/EN/Y2023/V56/I5/153

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