Analysis and Simulation on Intermittent Arc Grounding Overvoltage for Neutral Grounding via Arc-suppression Coil with Shunt Resistance in 35kV Urban Distribution Systems
QIAO Zhan-jun
Abstract：Some arc -suppression coil which has a relatively small overcompensation tuning -off degree is mainly used to compensate the capacitive current of line to ground , reduce the arc residual current and reigni-tion times, and then to increase the self -restoration probability after single phase intermittent arc grounding fault occurs.At the same time , a relatively small shunt resistance is mainly used to release the charge of line-to-ground capacitance quickly , improve the decay rate of fault and non -fault phase , s and neutral point , s overvoltage , reduce the rising speed of neutral point , s recovery voltage and its amplitude after the intermittent arc put out , so that the transient overvoltage can be restrained effectively.Results of ATP simulation have demonstrated the mode of neutral grounding via arc -suppression coil with shunt resistance is optimum choice which is applicable to 35 kV urban distribution networks mixed by overhead lines and cables.
Keywords：distribution systemneutral groundingarc -suppression coilshunt resistanceovervoltageATP simulation
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 47-52 )