Fault Location Technique for UHV Lines Using Wavelet Transform
نویسنده
چکیده
The paper illustrates a procedure based on the continuous-wavelet transform (CWT) for the analysis of current transients due to line faults. Considering roundly reliability and accuracy of one terminal fault location system for transmission lines, a single-ended continuous wavelet Transform (CWT) based fault location algorithm has been presented in this paper. Wavelet transform is a powerful mathematical tool which can be employed as a fast and very effective means of analyzing power system transient signals. The modal current is decomposed by wavelet in time. The different decomposition coefficients on different scales reflecting different frequency information are used to calculate the transient characteristic of voltage and current. The transient characteristic is then utilized to obtain the transient energy of the fault that is employed to identify the fault position. MATLAB/Simulink is used to generate fault signals and verify the correctness of the algorithm KeywordsAccuracy, Fault location, Fault currents, Continuous wavelet Transform, One end data
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