Classification Recognition for Power Energy Quality Composite Disturbance Based on S Transform and Hilbert-Huang Transform
Zhou Keli · Guangdong Electric Power · 2014
According to time-frequency analysis characteristic of S transform and Hilbert-Huang transform a kind of classification recognition method for power energy quality composite disturbance was proposed.By means of S transform,characteristics of fundamental frequency and high frequency of disturbance signals were extracted and instantaneous amplitude of signals before and after disturbance was extracted by combining with Hilbert-Huang transform.By analyzing characteristics of various disturbance signals,relevant characteristic function was defined as criteria for classification recognition to realize correct classification on power energy quality composite disturbance and accurate positioning for start and end time of transient disturbance.Experiment result indicated that by means of fusion of S transform and HHT,it was able to accurately detect affiliated classifications and disturbance characteristics of power energy quality disturbance signals and start and end time.