Research on Arc Grounding Overvoltage and Suppression Measures in Distribution Network

doi:10.3969/j.issn.1008-0198.2022.02.009

Abstract

Abstract: For the problem of overvoltage generated by single-phase arc grounding in 10 kV distribution network, three suppression methods of neutral point grounding via arc extinguishing coil, neutral point grounding via resistance and fault phase throwing grounding resistance are proposed. The arc grounding model under distribution network are built in ATP-EMTP software to simulate the voltage characteristics. The advantages and disadvantages of three methods are compared in view of the suppression effect to the arc grounding overvoltage. The results show that the mentioned three methods can effectively reduce the arc grounding overvoltage. Grounding the neutral point via the arc extinguishing coil is a more ideal method for urban distribution system due to its better effect.

Key words: arc grounding, overvoltage, ATP-EMTP simulation, distribution network

CLC Number:

TM866

HAI Bin, ZENG Zeyu, LI Chao, LIU Wei. Research on Arc Grounding Overvoltage and Suppression Measures in Distribution Network[J]. Hunan Electric Power, 2022, 42(2): 50-54.

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