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Novel wavelet approach to current differential pilot relay protection

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5 Author(s)
Chi-kong Wong ; Fac. of Sci. & Technol., Univ. of Macau, Taipa, Macau ; Chi-wai Lam ; Kuok-Cheong Lei ; Chu-San Lei
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This paper describes a novel technique for current differential pilot relay protection (CDPR) by using wavelet analysis. Power system CAD (PSCAD) is used to generate current signals at both ends of a transmission line in a typical system with fault at various locations. In this paper, discriminating between internal fault and external fault/change, identifying of faulted phase, and classifying fault type are achieved by using wavelet analysis. The simulation results show that this approach provides a high operating sensitivity for internal fault and remains stable for external fault/change.

Published in:

Power Delivery, IEEE Transactions on  (Volume:18 ,  Issue: 1 )

Date of Publication:

Jan 2003

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