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《Electrical Measurement & Instrumentation》 2009-12
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Study on Small Current Phase-to-ground Fault Location Method

FANG Dong-Xian,YUAN Zhen-Hai,Wang Qi,Rao Ri-Song (School ofAutomation and electrical engineering,NanjingUniversityofTechnology,Nanjing210009,China)  
Based on single-phase malfunction in low current grounded system,the transient zero-sequence capacitive current of faulty line in character frequency range is just the reverse of that in non-faulty line,extracting the phase information in character frequency range using complex wavelet transform was proposed. Meantime,the selection of maximization energy of wavelet transform was made. The emulation and analysis in MATLAB prove that this algorithm is not influenced by the transition resistance,and the close angle,and it can select the faulty line accurately.
【CateGory Index】: TM862
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