分闸电阻对单相重合闸瞬态恢复电压影响研究  

Study on Influence of Opening Resistance on Transient Recovery Voltage of Single-phase Reclosing Operation

作　　者：董彦辰 何柏娜[1] 贺兴民 张婧茹 颉雅迪 刘雨佳 边晨曦 DONG Yanchen;HE Baina;HE Xingmin;ZHANG Jingru;XIE Yadi;LIU Yujia;BIAN Chenxi(College of Electric and Electronic Engineering,Shandong University of Technology,Shandong Zibo 255000,China;State Grid Xinjiang Electric Power Research Institute,Wulumuqi 830011,China)

机构地区：[1]山东理工大学电气与电子工程学院,山东淄博255000 [2]国网新疆电力科学研究院,乌鲁木齐830011

出　　处：《高压电器》2023年第5期170-177,共8页High Voltage Apparatus

基　　金：山东省研究生教育质量提升计划项目(SDYKC19103);国家电网公司科技资助项目(SGSDDY00FCJS2000199)。

摘　　要：单相重合闸动作于永久性故障时,瞬态恢复电压(transient recovery voltage,TRV)的峰值远超国标值。文中以超高压示范工程线路为背景,利用ATP-EMTP模拟重合闸失败导致断路器二次开断的情况,分析重合闸最危险投切时间范围,结合短路电流分析断路器开断过程的3个阶段对TRV特性的影响,并针对加装方式、投切时间、阻值等不同因素分析分闸电阻对TRV的抑制效果。仿真结果表明:重合闸动作时间影响TRV峰值,动作于永久性故障时最严重工况的TRV高达1 153.1、1 699.4 kV;分闸电阻加快TRV振荡衰减速度,断路器首次开断故障时加装600Ω分闸电阻后TRV峰值分别降为751.3、930.8 k V,研究结果对超高压输电线路的工程设计具有参考价值。In case of single phase reclosing operation for permanent fault,the peak of transient recovery voltage(TRV)is far beyond the value specified in China National Standard.In this paper,the line of EHV demonstration porject is taken as the background,the ATP-EMTP is used to simulate the secondary interruption of circuit breaker due to the failure of reclosing operation.The range of the most dangerous switching time of reclosing operation is analyzed and,in combination with short circuit current,the influence of three stages during the interruption process of circuit breaker on TRV characteristic is analyzed,including the suppression effect of the opening resistor on the TRV by way of such different factors as installation mode,switching time and resistance.The simulation results show that the reclosing operation time affects peak of TRV,and the TRV at the most severe condition in the case of operation in the permanent fault is up to 1 153.1 kV and 1 699.4 kV.The opening resistor speeds up the rate of oscillation decay.In case of interrupting fault for the first time by the circuit breaker,the peak of TRV is reduced by 751.3 k V and930.8 kV respectively after installing 600 Ω opening resistor.The research result has reference for the engineerign design of EHV transmission line.

关 键 词：重合闸 二次开断 瞬态恢复电压 分闸电阻 永久性故障 

分 类 号：TM561[电气工程—电器] TM762.2