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Study on On-Line Detection of Characteristic Parameters in High Voltage Circuit Breaker Opening Process Based on Vibration Signal

机译：基于振动信号的高压断路器分闸过程特征参数在线检测研究

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摘要

Mechanical characteristic parameter can be used to evaluate circuit breaker performance, traditional test method for measuring characteristic parameter cannot be applied on-line, also the application process is complicated. To solve this problem, a new method for Timing parameters extraction from vibration signal of circuit breaker in opening process is proposed. First, based on the principle of spring operating mechanism, the vibration event caused by components impact in the opening process is analyzed. Then, in order to eliminate noise, variation mode decomposition is adopted to decompose vibration signal, reconstruct the signal by components whose waveform change is consistent with original signal. Finally, timing parameters in the opening process of circuit breaker (CB) are detected by double threshold method based on short time energy entropy ratio. Through comparison of the timing parameters extracted from vibration signal and experimental travel curve, the correctness of proposed method is verified. This study provides a new method for on-line detection of high voltage circuit breaker characteristic parameters.
机译：机械特性参数可以用来评价断路器的性能，传统的特性参数测试方法不能在线应用，应用过程复杂。针对这一问题，提出了一种在断开过程中从断路器振动信号中提取时序参数的新方法。首先，根据弹簧操作机构的原理，分析了零件在打开过程中受到冲击而引起的振动事件。然后，为了消除噪声，采用变化模态分解对振动信号进行分解，利用其波形变化与原始信号一致的分量重构信号。最后，基于短时能量熵比，采用双阈值法检测断路器分闸过程中的时序参数。通过比较从振动信号中提取的时间参数和实验行进曲线，验证了所提方法的正确性。该研究提供了一种在线检测高压断路器特性参数的新方法。

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