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Low Impedance Fault 검출을 위한 최적 마더 웨이브렛의 선정
변성현,김철환,김일동,한경남 성균관대학교 1997 학술회의지원논문목록집 Vol.1997 No.-
This paper introduces wavelets and shows that they may be efficient and usefyl for the detection of general faults in power system. The wavelet transform of a signal consists in measuring the similarity between the signal and a set of translated and scaled versions of a "mother wavelet". The "mother wavelet" is a chosen fast decauing oscillation function. A number of mother wavelet for signal analysis have been proposed and some of them are in use in fault detection. However, the performance of fault detection depend on used mother wavelet. In the present paper a comparative evaluation of different mother wavelets for low impodance fault detection is performed. The discussion is focused in well-known mother wavelet based wavelet transform. Several families of wavelets are used to analyse transient earth fault signals in a 345kV model system as generated by EMTP.