摘要
该文提出了一种分析高压断路器合闸同期性的新方法:将小波包提取算法和短时能量分析方法相结合,利用小波包分解与重构原理将断路器合闸振动信号分解到不同频段中,并对代表高频冲击信号的分解系数进行重构,然后运用短时能量分析方法对重构后的信号进行分析,辨识出合闸变位点。通过对三相合闸过程的分析,得出三相同期性。通过MATLAB仿真分析和实验结果验证了该方法的有效性。
A new method that analyzes switching synchronization of high voltage breakers is proposed. This method combines the wavelet packets extraction algorithm with the short time analysis method. By utilizing the theory of wavelet packet decomposition and reconstruction, the vibration signal of close operation of breakers is decomposed into different frequency sections, and the coefficients that represent the useful signal are reconstructed. Then by analyzing the signal that is reconstructed by using short time energy method, the changing point of close operation is detected. The switching synchronization can be acquired through analyzing the vibration signals of three phases. The validity of this method is proved by MATLAB simulation analysis and experiment results.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2005年第13期149-154,共6页
Proceedings of the CSEE
关键词
高压断路器
小波包
短时能量
合闸同期性
振动信号
High voltage breakers
Wavelet packets
Short time energy
Switching synchronization
Vibration signals
