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《Electrical Measurement & Instrumentation》 2011-10
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Fault Location of High Voltage Power Transmission Lines Using Travelling Wave Natural Frequency Based on Prony Method

XU Jun-ming,WEI Wen-wei,XIA Pei(1.China Three Gorges University,Yichang 443002,Hubei,China. 2.Neijiang Electric Power Bureau,Neijiang 641000,Sichuan,China)  
When a short circuit fault of transmission lines happened,it will produce transient state travelling waves.The frequency spectra of the travelling waves is a fundamental characteristic frequency,called natural frequencies.Accurate extracting the natural frequencies,which contains informations of position of fault,is able to realize fault location.As a traditional method,Fast Fourier Transform algorithm has not a high frequency resolution and cannot extract the natural frequencies precisely.In allusion to this problem,the paper brings forward applying the Prony Method,which has high precision of fitting,to extract the natural frequencies.The results of simulations by PSCAD and MATLAB show that Prony method can accurate extract the natural frequencies,and the location result is more accurate than Fast Fourier Transform method.
【CateGory Index】: TM755
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