A New TT-transform Based Method for Detection of Power Quality Disturbances
Peng Jian-chun · Electrical Measurement & Instrumentation · 2012
This paper proposed a new TT-transform based algorithm for detecting power quality disturbance.TTtransform is inverse Fourier transform of S-transform,and provides a representation of a one-dimensional time series into a two-dimensional time-time series.By detecting amplitude mutations of the diagonal elements corresponding to the TT-transform modulus matrix,positioning the beginning and ending times of power quality disturbance occurred,not only for accurate detection of a single power quality disturbances,but also the accurate detection of mixed disturbance.For hybrid disturbances signal containing harmonic disturbance,this paper presents two-TT-transform,based on the analysis of the S-transform results and the detection of diagonal sequence mutation of the TT-matrix,precise positioning of the beginning and ending time of each disturbance component.Simulation results show that the proposed method is feasible and effective.