地闪长连续电流对±500kV直流输电线路动作特性的影响  

Influence of the Ground Lightning Long Continuous Current on the Operation Characteristic of ±500kV DC Transmission Line

作　　者：卢泽军 赵淳[1,2,3] 王宇 肖盼[4] 黎鹏 LU Zejun;ZHAO Chun;WANG Yu;XIAO Pan;LI Peng(NARI Group Corporation(State Grid Electric Power Research Institute),Nanjing 211106,China;Wuhan NARI Limited Company,State Grid Electric Power Research Institute,Wuhan 430074,China;Hubei Key Laboratory of Power Grid Lightning Risk Prevention,Wuhan 430074,China;College of Electrical Engineering and New Energy,Three Gorges University,Yichang 443002,China)

机构地区：[1]南瑞集团有限公司(国网电力科学研究院有限公司),南京211106 [2]国网电力科学研究院武汉南瑞有限责任公司,武汉430074 [3]电网雷击风险预防湖北省重点实验室,武汉430074 [4]三峡大学电气与新能源学院,湖北宜昌443002

出　　处：《电瓷避雷器》2020年第6期29-35,共7页Insulators and Surge Arresters

基　　金：国家电网公司总部科技项目(编号:524625180018)。

摘　　要：笔者对连续电流的特征规律进行了统计分析,建立了考虑长连续电流的雷击过电压仿真模型,仿真分析了地闪长连续电流对±500 kV直流输电线路动作特性的影响。仿真结果表明:长连续电流对线路过电压幅值的影响较小,但雷击造成绝缘子闪络后,绝缘子闪络电流的增大幅度为连续电流幅值的47%左右。避雷器正常运行情况下,带长连续电流的单次回击对线路动作特性几乎没有影响;而避雷器故障失效后,流过故障避雷器的电流增幅约为连续电流幅值的45%。研究可为地闪长连续电流的防护提供参考。Based on the statistical analysis of the characteristics of the continuous current,the lightning overvoltage simulation model considering the long continuous current is established. The influence of the long continuous current of the ground lightning on the operation characteristics of ± 500 kV DC transmission line is simulated and analyzed. Simulation results show that the long continuous current has less effect on the overvoltage amplitude of the transmission line. But after the lightning causes the insulator flashover,the flashover current of the insulator is increased by about 47% of the continuous current amplitude. When the arrester is normal operation,the single return stroke with long continuous current has little impact on the operation characteristic of the transmission line. When the arrester is failure,the current passing the fault arrester is increased by about 45% of the continuous current amplitude. The research can provide reference for the protection of the ground lightning long continuous current.

关 键 词：长连续电流 ±500kV直流线路 带串联间隙避雷器 动作特性 

分 类 号：TM863[电气工程—高电压与绝缘技术]