数学形态方法及其在电力信号处理中的应用

Mathematical Morphology Method and Its Application in Power System Signal Processing

针对电力信号在实时采样处理中,由于现场环境、设备等不同影响,采样得到的信号中叠加各种干扰、噪声及衰减直流分量等问题,提出采用数学形态处理方法处理电力采样信号,以实现消噪、高频干扰滤除以及衰减直流分量提取等目的。首先分析数学形态方法的特点,考虑采用交替混合滤波器进行滤波处理;然后,针对各种不同干扰信号,采用不同结构元素进行滤波处理,通过比较信号处理误差,分别为不同参数下的干扰信号选取合适的结构元素;最后,结合仿真和实验结果验证所提方法,特别是所设计结构元素的可行性和有效性。

In view of the problems of various interference,noise and attenuated DC component superimposed on the sampled signal due to the different influence of the field environment and equipment in the real-time sampling processing of power signals,this paper proposed a mathematical morphological processing method to process the sampled signal in order to achieve the purposes of noise elimination,high frequency interference filtering and extraction of attenuated DC component.Firstly,the characteristics of mathematical morphology method are analyzed,and alternating mixing filter is considered to filter.Then,different structural elements are used to filter different interference signals.By comparing signal processing errors,appropriate structural elements are selected for interference signals with different parameters.Finally,the simulation and experimental results are used to verify the proposed method,especially the feasibility and validity of the designed structural elements.