零相位滤波在电网行波数据处理中的应用

Zero-phase Filter for Power Netwoks Traveling Wave Process

针对传统IIR滤波存在的相位非线性的缺点,提出了对电网故障行波进行零相位滤波的处理方法,仿真结果表明零相位滤波器不仅实现了故障行波信号滤波后的零相位延迟,也消除了一次滤波后信号起始部位的畸变。

In order to get more excellent filter for traveling wave, the authors discuss the zero - phase filter. The simulation results have illustrated that the method is an effective algorithm. Comparing with general difference filter, the zero - phase digital filter can not only avoid phase shifting, but also improve the wave aberration of sec tion start. This method has important practical Value in signal processing.