±1100 kV特高压直流线路无间隙线路避雷器雷电防护适用性研究  

Lightning Protection Applicability of Gapless Arrester in ±1 100 kV UHV DC Transmission Lines

作　　者：顾建伟 余辉 陈维江[3] 黄胜鑫 何天宇 边凯 时卫东 GU Jianwei;YU Hui;CHEN Weijiang;HUANG Shengxin;HE Tianyu;BIAN Kai;SHI Weidong(China Electric Power Research Institute,Beijing 100192,China;China Renewable Energy Engineering Institute,Beijing 100120,China;State Grid Corporation of China,Beijing 100031,China;China Electric Power Planning&Engineering Institute,Beijing 100120,China)

机构地区：[1]中国电力科学研究院有限公司,北京100192 [2]水电水利规划设计总院,北京100120 [3]国家电网公司,北京100031 [4]电力规划设计总院,北京100120

出　　处：《电瓷避雷器》2023年第6期126-137,共12页Insulators and Surge Arresters

基　　金：中国电建集团核心技术攻关项目(编号:DJ-HXGG-2022-01)。

摘　　要：为抑制操作过电压,昌吉-古泉±1 100 kV特高压直流输电线路在线路中部安装多对无间隙避雷器,但针对无间隙避雷器兼顾雷电防护适用性的研究较少。本研究基于EMTP-ATP建立了雷电过电压瞬态传播模型,计算了特高压直流线路的雷击闪络率,分析了避雷器对雷电过电压的抑制效果和保护范围。结果显示无间隙避雷器对雷电过电压幅值、波形存在抑制作用,安装避雷器后,线路绕、反击耐雷水平增加。未加装避雷器的邻近杆塔依旧可发生雷击闪络,避雷器只可保护加装级杆塔。本研究基于计算结果提出了无间隙线路避雷器的优化配置原则,建议在满足操作过电压抑制要求的前提下,适当调整避雷器至地面倾角大于15°的中、高雷区、接地电阻较大的杆塔上。In order to suppress the switching overvoltage,the Changji-Guquan ±1 100 kV UHVDC transmission line installed multiple pairs of gapless arresters in the middle of the line,but few studies were carried out on the applicability of the gapless arresters taking into account the lightning protection.In this paper,lightning overvoltage transient propagation model was established based on EMTP-ATP,the lightning trip-out rates of UHVDC line were calculated,and the suppression effect and protection scope of lightning arrester on lightning overvoltage were analyzed.Results showed that the gapless arrester has a suppressing effect on the amplitude and waveform of lightning overvoltage.With the arrester installed,the lightning withstand level of the back flashover and lightning shielding failure increased.Lightning flashover could still occur on adjacent towers without lightning arresters,which means lightning arresters can only protect the towers with arresters.Based on the calculation results,the optimal configuration principle of the gapless line arrester is put forward.It is suggested that the arrester should be properly adjusted to towers with the ground slope angle greater than 15° in medium or high lightning strike risks areas and with large grounding resistance,under the premise of meeting the requirements of operating overvoltage suppression.

关 键 词：±1100 kV特高压直流 无间隙避雷器 保护范围 雷击闪络 雷电过电压 

分 类 号：TM862[电气工程—高电压与绝缘技术] TM721.1