谐振接地系统对弧光接地过电压的抑制建模及仿真分析  

Modeling and Simulation of Arc Grounding Overvoltage Suppression by Resonant Grounding System

作　　者：王玮 WANG Wei(Research Institute,State Grid Jiangsu Electric Power Co.Ltd.,Yinchuan 750000,China)

机构地区：[1]国网宁夏电力有限公司电力科学研究院,宁夏银川750000

出　　处：《微型电脑应用》2020年第10期171-173,共3页Microcomputer Applications

摘　　要：从理论层面研究了谐振接地类型的单相接地故障,同时采用RTDS建立中性点经消弧线圈接地的供电系统模型,分析了消弧线圈响应时间所起到的接地电弧抑制作用。仿真结果表明:接地电弧都没有发生重燃的现象,当接地电流变小后可以使电弧更容易熄灭,而消弧线圈能够抑制高幅值过电压,使弧隙恢复电压需更长时间恢复,从而减小了电弧重燃概率,由此实现熄灭电弧的效果。谐振接地系统发生接地电弧首次燃烧过程中形成的暂态电压与电流跟中性点未接地系统一致,都表现为消弧线圈没有对首次燃弧的瞬间实施补偿。The single-phase groundingfault of resonant groundingwas studied theoretically.At the same time,RTDS was used to establish the power supply system model of neutral point grounded by arc suppression coil,and the suppression effect of arc suppression coil response time was analyzed.The simulation results show that the ground arc does not reignite,and when the groundingcurrent decreases,the arc can be more easily extinguished,and the arc suppression coil can suppress the high amplitude overvoltage,so that the recovery voltage of the arc gap takes longer to recover.Thus,reducingthe probability of arc reignition can realize the effect of arc extinction.The transient voltage and current formed duringthe first groundingarc combustion in resonant groundingsystem are consistent with the ungrounded neutral system,which shows that the arc suppression coil does not compensate the moment of the first arc combustion.

关 键 词：接地系统 电压抑制 建模 仿真分析 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]