Analysis of power system transient signal based on improved Prony algorithm
Yang Xuan-fang · Dianli zidonghua shebei · 2012
A method of power system transient signal analysis based on improved Prony algorithm is proposed to improve the analysis precision for the transient signal containing harmonic,inter-harmonic and decaying DC components.The model of Prony algorithm can describe the characteristics of transient signal more exactly and acquires the signal frequency directly.The differential algorithm is used to wipe off the decaying DC component and magnify the high frequency components to improve the analysis precision.The frequency components of signal are assumably estimated based on Prony algorithm to determine the amount of nerve cell and the initial values of neural network.Each frequency is treated as the weight to be adjusted and the amplitude and frequency of each frequency is estimated.Simulative results demonstrate the high accuracy and rapid convergence of the proposed algorithm.