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Wavelet-based relay agent for isolating faulty sections in distribution grids with distributed generators

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3 Author(s)
Perera, N. ; Dept. of Electr. & Comput. Eng., Manitoba Univ., Winnipeg, Man., Canada ; Rajapakse, A.D. ; Gole, A.M.

This paper presents an agent based protection scheme to detect and isolate the faults in a distribution system with high penetration of distributed generation. An algorithm that uses wavelet coefficients of the transient fault currents is proposed for the identification of faulted sections. The algorithm is a hybrid of two techniques: one that determines the direction of fault currents based on the sign of wavelet coefficients and the other that estimates the distance to a fault based on the time interval between the travelling waves (and their reflections) arriving from the fault. Studies with a simulated distribution system indicate that the proposed method can correctly recognize the faulty sections.

Published in:

AC and DC Power Transmission, 2006. ACDC 2006. The 8th IEE International Conference on

Date of Conference:

28-31 March 2006