基于PSCAD的输电线路操作过电压分析  

Analysis of Operating Overvoltage of Transmission Line Based on PSCAD

作　　者：王翼虎 张广东 刘康 张航 WANG Yihu;ZHANG Guangdong;LIU Kang;ZHANG Hang(State Grid Gansu Electric Power Research Institute,Lanzhou 730000,China)

机构地区：[1]国网甘肃省电力公司电力科学研究院,甘肃兰州730000

出　　处：《电工技术》2022年第13期135-137,共3页Electric Engineering

摘　　要：合闸电阻被广泛用于限制断路器操作过电压,但是对于一些中短线路,操作过电压值较小,且近年来合闸电阻破裂引起的故障频频发生,影响供电可靠性,因此还需进一步研究对中短线路断路器安装合闸电阻的必要性。以甘肃某330 kV线路为例,采用PSCAD软件计算了该线路的合空线操作过电压及单相重合闸操作过电压,并对比分析了三相合闸同期性、合闸相位、避雷器及线路结构等因素对操作过电压的影响,为实际线路运维检修提供参考。Closing resistors are widely used to limit the operating overvoltage of circuit breakers.For some medium and short circuits,the operating overvoltage does not exceed the standard specified value.However,in recent years,faults caused by the rupture of the closing resistor have occurred frequently,affecting the reliability of power supply.Therefore,taking a 330 kV line in Gansu Province as an example,the switching overvoltage of air closing line and single-phase reclosing are calculated by PSCAD software.The effects of three-phase closing synchronization,closing phase,lightning arrester and line structure on operating overvoltage are compared and analyzed,so as to provide reference for actual line operation and maintenance.

关 键 词：合闸电阻 操作过电压 PSCAD 

分 类 号：TM864[电气工程—高电压与绝缘技术]