±1100 kV特高压直流输电线路防雷保护  

Lightning Protection of ±1 100 kV UHVDC Transmission Line

作　　者：张刘春[1] Zhang Liuchun(China Electric Power Research Institute Beijing 100192 China)

机构地区：[1]中国电力科学研究院,北京100192

出　　处：《电工技术学报》2018年第19期4611-4617,共7页Transactions of China Electrotechnical Society

基　　金：国家重点研发计划(2016YFB0900800);国家电网公司项目(GYB201701053)资助

摘　　要：±1 100 kV特高压直流输电线路的防雷保护对±1 100 kV特高压直流工程的安全运行至关重要。该文依托正在建设的准东—华东±1 100 kV特高压直流示范工程,通过统计该工程沿线所经6省区运行线路的雷击跳闸率,确定了该线路的雷击闪络率参考值;根据该工程沿线的年平均雷暴日、地形及采用的典型杆塔,计算了该线路在不同地线保护角下的雷击闪络率;通过与±800 kV特高压直流输电线路耐雷性能的比较,论证了所用计算方法的合理性。研究结果表明,全线地线保护角采用-10°设计时,该工程的雷击闪络率可满足雷击闪络率参考值要求,且全线的雷击闪络次数可控制在3次/a。研究结果已应用于准东—华东±1 100 kV特高压直流输电线路的防雷保护设计,并将指导±1 100 kV特高压直流输电线路防雷保护标准的制定。Reliable lightning protection of±1 100 kV UHVDC transmission line is crucial for the safe operation of±1 100 kV UHVDC project.Based on±1 100 kV UHVDC transmission line from Zhundong to Huadong,which is under construction,to determine the reference value of flashover rate for this project,the lightning trip out rate of the transmission lines already under operation was studied based on statistics from 6 provinces along the route of this project.According to the given computation conditions of this transmission line,the flashover rates at different shielding angle were estimated.To prove the rationality of the computation method used in±1 100 kV UHVDC transmission line,the lightning performance obtained from the±1 100 kV UHVDC transmission line was compared with that of the±800 kV UHVDC transmission line.Researched results showed that the striking flashover rate of this project will satisfy the requirement of the reference value,and the flashover time will not be over 3 times per year when the shielding angle used in the transmission line is not over?10°.The results from this study have been used in the engineering design of±1 100 kV UHVDC transmission line from Zhundong to Huadong,and will provide basis for drafting lightning protection standards for±1 100 kV UHVDC transmission lines.

关 键 词：±1100kV特高压直流输电线路防雷保护 

分 类 号：TM722[电气工程—电力系统及自动化] TM863