摘要
输电线路发生短路故障时,产生的故障暂态行波是一种非线性非平稳信号。初始行波信号到达检测点,测量信号将出现突变,小波变换能够检测出该突变并用模极大值进行刻画。MATLAB仿真结果表明,该方法能准确实现故障选相。
When a short circuit fault of transmission lines happens, it will produce transient state wave, which is a non- linear and non-stationary signal. When initial travelling signal reaches the detection, the measurement signals will produce mutation, which can be detected by wavelet and use its modulus maxima to describe. The results of simulation by MATLAB show that this method can accurately realize fault-selection and fault location.
出处
《电气开关》
2013年第6期43-45,共3页
Electric Switchgear
关键词
行波
小波变换
故障选相
travelling wave
wavelet method
fault-selection
