Identification Method for Operation State of High Voltage Circuit Breakers Based on Spectral Shape Entropy Characteristics of Vibration Signals
Zhao Shutao1, Xu Wenjie1, Liu Huilan1, Zeng Rui1, Xia Xiaofei2
1. Hebei Provincial Key Laboratory of Power Transmission Equipment Security Defense North China Electric Power University Baoding 071003 China; 2. Electric Power Research Institute of Guangxi Power Grid Corporation Co. Ltd Nanning 530023 China
Abstract：The potential energy of the energy storage spring of the high voltage circuit breaker is instantaneously released and converted into mechanical energy, inducing the movement of the mechanism components. This enables the static and dynamic contacts to complete the opening and closing operations. The accompanying vibration signal exhibits non-stationary and non-linear characteristics. In this paper, a feature analysis method called spectral shape entropy is propose . Firstly, the non-stationary signal with complicated frequency structure is gradually split by using the complete ensemble empirical mode decomposition with adaptive noise (CEEMDAN) to obtain the components representing different frequency band features. Then the power spectrum of the filtered component signal is transformed to polar coordinates, and the sensitivity of the main peak region is improved by the divergence factor. Calculating the spectral shape entropy characteristics according to the waveform scattered in sub-regions. Finally, the support vector machine optimized by grouped particle swarm algorithm model is used to identify the circuit breaker operating states. The experiments show that the spectral shape entropy can characterize the waveform variation of vibration signals and the distribution of the main peaks of the power spectrum. It has high accuracy in identifying typical mechanical faults of circuit breakers and takes less computing time.
赵书涛, 许文杰, 刘会兰, 曾瑞, 夏小飞. 基于振动信号谱形状熵特征的高压断路器操动状态辨识方法[J]. 电工技术学报, 2022, 37(9): 2170-2178.
Zhao Shutao, Xu Wenjie, Liu Huilan, Zeng Rui, Xia Xiaofei. Identification Method for Operation State of High Voltage Circuit Breakers Based on Spectral Shape Entropy Characteristics of Vibration Signals. Transactions of China Electrotechnical Society, 2022, 37(9): 2170-2178.
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