多重雷击下10 kV架空线路氧化锌避雷器的保护特性  

Protection Characteristics of Zinc Oxide Arresterfor 10 kV Overhead Line Under Multiple Lightning Strikes

作　　者：周秀 田天 白金 罗艳 司文荣[2] 杨海涛 吴文锋 杨鑫[4] ZHOU Xiu;TIAN Tian;BAI Jin;LUO Yan;SI Wenrong;YANG Haitao;WU Wenfeng;YANG Xin(State Grid Ningxia Electric Power Co.,Ltd.Electric Power Research Institute,Yinchuan 750002,China;East China Electric Power Research Institute Co.,Ltd.,Shanghai 200433,China;State Grid Anhui Electric Power Co.,Ltd.Electric Power Research Institute,Hefei 230601,China;School of Electrical Engineering Changsha University of Science and Technology,Changsha 410114,China)

机构地区：[1]国网宁夏电力有限公司电力科学研究院,银川750002 [2]华东电力试验研究院有限公司,上海200433 [3]国网安徽省电力有限公司电力科学研究院,合肥230601 [4]长沙理工大学电气与信息工程学院,长沙410114

出　　处：《电瓷避雷器》2024年第4期71-81,共11页Insulators and Surge Arresters

基　　金：国家自然科学基金面上项目(编号:52177015)。

摘　　要：自然界的雷击形式以多重雷击为主,多重雷击会使氧化锌避雷器(MOA)更容易超出能量阈值。多重雷击对电力线路的影响近年来已陆续展开研究,但仍缺少对多重雷击时感应雷过电压下配电线路的耐受特性研究。总结归纳了多重雷击的基本参数,计算了配电线路中常用的(YH)HY5WS-17/50型MOA的最大能量允许值,以此为MOA是否损坏的判据。搭建了10 kV架空线路雷电过电压仿真模型,构建了多重雷击的感应雷仿真波形。从10 kV架空线路常见的感应雷和雷击导线这2种雷击形式出发,研究了这2种雷击形式多重雷击下对10 kV架空线路中MOA的能量吸收影响,并与单一雷击时的耐雷水平进行对比;同时还研究了对于MOA在全线安装、隔塔安装、定点安装3种方式下MOA吸收能量变化情况。结果表明,对于10 kV架空线路的典型设置下,多重雷击下MOA吸收能量最多可超出单一雷击时的2倍;MOA隔塔安装方式的耐雷水平均高于全线安装时的水平;MOA在隔塔安装方式下,吸收能量均比全线安装时的要低,该现象在多重雷击下更明显,因此建议在配电线路中MOA采用隔塔安装的方式。Multiple lightning strikes are the main form of lightning strikes in nature.Multiple lightning strikes will make zinc oxide arrester(MOA)more likely to exceed the energy threshold.The influence of multiple lightning strikes on power lines has been studied in recent years,but there is still a lack of research on the tolerance characteristics of distribution lines under induced lightning overvoltage under multiple lightning strikes.The author summarizes the basic parameters of multiple lightning strikes,and calculates the maximum energy allowable value of(YH)HY5WS-17/50 MOA commonly used in distribution lines,which is used as a criterion for MOA damage.The lightning overvoltage simulation model of 10 kV overhead line is built,and the induced lightning simulation waveform of multiple lightning strikes is constructed.Based on the two common lightning strike forms of induction lightning and lightning con-ductor in 10 kV overhead lines,the influence of multiple lightning strikes on the energy absorption of MOA in 10 kV overhead lines is studied,and compared with the lightning withstand level under single lightning strike.At the same time,the energy absorption changes of MOA in three ways of whole line installation,tower installation and fixed point installation are studied.The results show that under the typical setting of 10 kV overhead lines,the energy absorbed by MOA under multiple lightning strokes can be up to twice that under single lightning stroke.The lightning withstand level of MOA tower installation is higher than that of the whole line installation;the absorption energy of MOA is lower than that of the whole line installation under the isolation tower installation mode,which is more obvious under multiple lightning strikes.Therefore,it is recommended to install MOA in distribution lines.

关 键 词：多重雷击 ATP-EMTP 氧化锌避雷器 10 kV架空线路 通流能量 耐雷水平 

分 类 号：TM863[电气工程—高电压与绝缘技术]