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Effects of magnetic field induction and ground potential rise on pilot wire relay system operations

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5 Author(s)
Yang, C.-F. ; Dept. of Electr. Eng., Nat. Taiwan Inst. of Technol., Taipei, Taiwan ; Hwang, J.-T. ; Lee, T.-H. ; Yang, J.-S.
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In the paper, magnetic field induction and ground potential rise (GPR) problems have been evaluated to investigate false responses of pilot wire relays, causing the blackout of a 2100 MVA 161/69 kV substation in a major Taiwanese electric power utility. Based on available field information, the EMTP package was applied to determine the magnetic field induced voltage (MFIV), and a simple model was used for GPR calculations. Those results and an analysis of the false responses are presented. Also, methods for protecting against the MFIV and GPR for the pilot wire relay system are discussed

Published in:

Generation, Transmission and Distribution, IEE Proceedings-  (Volume:143 ,  Issue: 3 )