形态学滤波器结构元素选取原则研究与分析

形态学滤波器作为一种非线性滤波工具,以其良好的消噪性能越来越多地被运用到电力系统采样数据的处理中.形态学滤波器所选用的结构元素对滤波效果有着重要的影响,但目前结构元素的选取还没有针对具体应用背景的选取原则.针对电力系统中的常见噪声,通过数值仿真,对几种常用结构元素的滤波效果及计算速度进行了详细的分析研究,进而给出了结构元素类型的一般选取原则.同时提出了关于结构元素宽度及幅值选取的一些规律,为形态学滤波器的设计提供了参考依据.

Research and analysis of morphological filter's structure element selection principle

As a kind of non-linear filter, morphology filter is widely applied in sampled power system signal processing with its effective denoising performance. The structure element (SE) has an important impact on the filtering effect, but there has no SE selection principle for specific application background. With respect to different types of the interference possibly encountered in power system, through numerical simulation, this paper analyzes the denoising performance and calculation speed of some common SEs in detail and then gives the general SE type selection principle. Meanwhile, some selection laws about the amplitude and width of SE are proposed. These results may provide useful references for morphology filter design.