Overvoltage Occurrence Due to Ferroresonance Phenomena During The EHV Cable Feeder Charging

EHV cables have higher capacitance and a larger current, which increases the possibility of overvoltage occurrences during the charging. A 400kV EHV cable experienced a long-duration overvoltage incident that damaged the Lightning Arrestor. - Dileep Kumar

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EHV cables have higher capacitance and a larger current, which increases the possibility of overvoltage occurrences during the charging. A 400kV EHV cable experienced a long-duration overvoltage incident that damaged the Lightning Arrestor. The incident was analyzed using EMTP®, and mitigation methods for cable charging were proposed. The EMTP simulation and site relay measurements matched closely. The presentation will share the analysis results and mitigation methods.


Tag(s) EHV Cables , Overvoltage , Ferroresonance , Lightning Arrestor , EMTP Simulation ,

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