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《Automation of Electric Power Systems》 2003-03
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SIMPLE ANALYSIS OF PHASELET ALGORITHM

Wen Minghao, Chen Deshu (Huazhong University of Science and Technology, Wuhan 430074, China)  
In this paper phaselet algorithm is introduced at first. By the analysis of amplitude-frequency characteristics and the comparison with complete wave Fourier's integral, the conclusion has been made that quarter cycle phaselet algorithm should be applied carefully and shouldn't be used in distance relay protection. On the basis of current differential protection principium, phaselet algorithm can shorten trip time without any damage to the reliability. EMTP simulation verifies the correctness of this conclusion.
【CateGory Index】: TM771
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