基于经验模态分解的局部放电信号窄带周期干扰的抑制

Suppression of periodic narrow bandwidth interference for partial discharge based on empirical mode decomposition

现场局部放电在线检测过程中,常伴随有窄带周期性干扰,对局部放电信号的检测带来很大的困难。采用经验模态分解与变步长自适应滤波相结合的方法进行干扰抑制。通过计算机仿真和实际数据的处理,验证了该方法的有效性。

Since periodic narrow bandwidth interference obstruct partial discharge on-line detection,this paper proposes to suppress interference by combining empirical mode decomposition and variables step size adaptive filtering algorithm.Its effectiveness is proved by computer simulation and actual data handling.