多回击地闪特征参数及其对直流线路故障的影响研究  

Characteristic Parameters of Cloud to Ground Lightning With Multiple Return Strokes and Their Influence on DC Transmission Line Fault

作　　者：胡杨 赵淳[1,2,3] 雷梦飞 卢泽军[1,2,3] 王宇 龚慧[4] HU Yang;ZHAO Chun;LEI Mengfei;LU Zejun;WANG Yu;GONG Hui(NARI Group Corporation(State Grid Electric Power Research Institute),Nanjing 211106,Jiangsu Province,China;Wuhan NARI Limited Liability Company,State Grid Electric Power Research Institute,Wuhan 430074,Hubei Province,China;Hubei Key Laboratory of Lightning Risk Prevention for Power Grids(Wuhan NARI Limited Liability Company,State Grid Electric Power Research Institute),Wuhan 430074,Hubei Province,China;China Electrical Power Research Institute,Haidian District,Beijing 100192,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),江苏省南京市211106 [2]国网电力科学研究院武汉南瑞有限责任公司,湖北省武汉市430074 [3]电网雷击风险预防湖北省重点实验室(国网电力科学研究院武汉南瑞有限责任公司),湖北省武汉市430074 [4]中国电力科学研究院有限公司,北京市海淀区100192

出　　处：《电网技术》2023年第1期404-412,共9页Power System Technology

基　　金：国家电网公司科技指南项目(524625200017)。

摘　　要：基于浙江和西藏两地区的地闪活动观测资料,分析、对比了两地地闪参数的特征,并建立了多回击地闪雷击线路仿真模型,计算分析了地闪特征参数对线路动作特性的影响。结果表明,浙江地区的多回击地闪百分比、地闪回击次数、地闪持续时间、回击时间间隔和地闪回击强度等参数均要大于西藏地区,两地多回击地闪的地闪持续时间大于500ms的比例和后续回击大于首次回击的比例均不可忽视;多回击地闪作用下的线路耐雷水平与单次回击作用下的线路耐雷水平相等,线路的重启失败率随着多回击地闪的地闪回击次数增大和地闪持续时间的延长而呈现先增大后减小的趋势;适当延长线路重启过程的去游离时间以及增加线路重启次数,有助于提高多回击地闪作用下线路的重启成功率。Based on the observation data of the cloud-toground(CG)lightning activities in Zhejiang province and Tibet autonomous region,the characteristics of the CG lightning parameters in these two areas are analyzed and compared,and a simulation model of multi-return stroke striking line is built.The influence of the CG lightning characteristic parameters on the line action characteristics is calculated and analyzed.The results show that the parameters in Zhejiang area are greater than those in Tibetan area,including the percentage of multi-return strokes,the multiple strokes lightning frequency,the duration of strokes,the interval time of multi-return strokes and the intensity of CG lighting.The following proportions can not be ignored,one is that of the duration of strokes greater than 500ms in these two areas and the other is that of the intensity of the subsequent-return stroke greater than the first-return stroke.The lightning resistance level of the line under the action of multi-return strokes is equal to that under the action of a single stroke.The restart failure rate of the line increases first and then decreases with the increase of the number of CG lightning return strokes and the extension of the duration of CG lightning.Appropriately extending the deionization time of the line restart process and increasing the line restart times are helpful to improve the line restart success rate under the action of multi-return strokes.

关 键 词：多回击地闪 特征参数 输电线路 线路动作特性 

分 类 号：TM721[电气工程—电力系统及自动化]