Application of Generalized S-transform in Power Quality Disturbances Analysis
Aiqin Xu · Proceedings of the Chinese Society of Universities for Electric Power System and its Automation · 2010
A new method based on Generalized S-transform(GST)was proposed for detecting and identifying power quality disturbances(PQDs).The GST transform formula of discrete time series is deduced firstly.Then trans-form typical PQDs into the phase space by GST,abstract effective characteristic quantity and locate the high-frequency singular points.Comparing with S-transform(ST),example results show that the GST method not only can effectively detect changes in voltage amplitude of the transient,but can accurately determine the frequency of changes.Meanwhile,the propsed method is quite useful for inter-harmonics and phase detection.