配电网单相接地故障信号形态学消噪方法

摘要

Combining the characteristics of the signal for phase to ground fault in distribution network,a signal de-noising method with mathematical morphology was introduced, which process the data of phase to ground fault with the flat structure combined morphology filter. It can effectively de-noise the signals without changing the local characteristics of the original signals. Matlab simulation results verified the effectiveness of the proposed method.%为提高单相接地故障选线的准确性,针对配电网单相接地故障信号的特点,提出一种应用数学形态学的信号消噪方法.该方法采用扁平结构组合形态滤波器,通过合理选择结构元素的宽度和幅值,在保证信号局部特征不失真的前提下实现了单相故障信号的有效去噪.通过Matlab仿真实验证实了该方法的有效性.