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Performance of Power Differential Relay With Adaptive Setting for Line Protection

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3 Author(s)
Abdel-Maksoud I. Taalab ; Fac. of Eng., El-Menoufia Univ., Shebin El-Kom ; Hatem A. Darwish ; Eman S. Ahmed

In this paper, proposed setting and response evaluations of power differential relay scheme for line protection are presented. Mathematical expressions describing the adaptive features of both active and reactive power settings are given. The union action of these two detectors is adopted to provide sensitive detection for high impedance internal faults and avoid maloperation for all power swings and external fault conditions. Response is computed for both active and reactive power detectors under different operation and fault conditions. The results corroborate the applicability and the immunity of the proposed relay scheme against the sampling misalignment and practical frequency drift. High sensitivity for high impedance internal faults is verified

Published in:

IEEE Transactions on Power Delivery  (Volume:22 ,  Issue: 1 )