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Selective ground-fault protection using an adaptive algorithm model in neutral ungrounded power systems

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2 Author(s)
Mu Longhua ; Dept. of Electr. Power Eng., China Univ. of Min. & Technol., Xuzhou, China ; Li Xiaobo

The selective ground-fault protection is greatly valued for the safe and reliable operation of power systems. In order to eliminate the effect of zero-sequence current transformer's phase character on selective ground-fault protection devices, this paper proposes a new adaptive principle of selective ground-fault protection, and gives an algorithm model of action criterion based on the half-wave Fourier algorithm. The simulation results show that this criterion will possess very good selectivity to ground faults

Published in:

Power System Technology, 2000. Proceedings. PowerCon 2000. International Conference on  (Volume:3 )

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