海底电缆-架空线线路雷击过电压分析与计算  

Analysis and calculation of submarine cable-overhead line lightning overvoltage

作　　者：兰贞波 赵常威[2] 阮江军[3] 

机构地区：[1]国网电力科学研究院,湖北武汉430074 [2]安徽省电力科学研究院,安徽合肥230601 [3]武汉大学电气工程学院,湖北武汉430072

出　　处：《电力自动化设备》2014年第10期133-137,共5页Electric Power Automation Equipment

基　　金：国家重点基础研究发展计划(973计划)资助项目(2011CB209404);中央高校基本科研业务费专项资金资助项目(20102070201000069)~~

摘　　要：结合某实际海上风电场,计算了某岛屿的海底电缆-架空线线路的雷击过电压。基于对线路各部分结构的分析,在ATP-EMTP软件中搭建了仿真计算模型,利用该模型,计算了线路在不同工况下的雷击过电压,利用计算结果分析了避雷器布置方式、杆塔冲击接地电阻、海底电缆长度对雷击过电压的影响。计算和分析结果表明:当采用不同形式的避雷器布置方式时,线路首末两端的过电压均未超过海底电缆主绝缘水平;海底电缆的末端过电压随冲击接地电阻的增大而增大;海底电缆首末两端的雷击过电压值均受海底电缆长度的影响。The transmission line lightning overvoltage of an offshore wind farm is calculated,which is composed of submarine cables and overhead lines. Based on the structural analysis of different transmission line parts,a simulation model is established with ATP-EMTP software and the transmission line lightning overvoltage is calculated for different operating conditions,based on which,the influences of arrester arrangement mode,tower impulse grounding resistance and submarine cable length on the lightning overvoltage are analyzed. The calculative and analytical results show：for different arrester arrangement modes,the lightning overvoltages of both line terminals are always smaller than the main insulation level of submarine cable;the lightning overvoltage of the end terminal of submarine cable increases along with the increase of impulse grounding resistance;the lightning overvoltages of both submarine cable terminals are affected by its length.

关 键 词：雷击 过电压 海底电缆 架空线路 避雷器 接地电阻 风电场 ATP-EMTP 模型 

分 类 号：TM726.3[电气工程—电力系统及自动化] P756.1[天文地球—海洋科学]