雷电先导发展模型的引雷塔击距计算与分析  

Research on Calculation of Lightning Tower Striking Distance Based on Leader Progression Model

作　　者：王锐 彭向阳 文豹 文习山[2] 王羽[2] 王健[2] 邓冶强 WANG RUI;PENG XIANGYANG;WEN BAO;WEN XISHAN;WANG YU;WANG JIAN;DENG YEQIANG(Electric Power Research Institute of Guangdong Power Grid Co.,Ltd,Guangzhou,Guangdong 510080,China;School of Electrical Engineering and Automation,Wuhan University,Wuhan,Hubei 430072,China)

机构地区：[1]广东电网有限责任公司电力科学研究院,广东广州510080 [2]武汉大学电气与自动化学院,湖北武汉430072

出　　处：《广东电力》2019年第3期112-118,共7页Guangdong Electric Power

基　　金：广东电网有限责任公司科技项目(GDKJXM20162136)

摘　　要：为使用电气几何模型分析引雷塔对输电线路雷击跳闸情况的影响规律,需要对引雷塔的击距进行计算。为此,利用雷电先导发展模型,在考虑了正极性迎面先导起始与发展过程和负极性地闪下行先导通道电荷量与电荷分布特性情况下,建立了引雷塔接闪过程的有限元仿真计算模型,并对安装避雷针的引雷塔击距进行计算,分析了避雷针尺寸和引雷塔高度对击距的影响,得出:在同一电流幅值下,引雷塔击距与避雷针长度、引雷塔高度呈现正相关性;而且随着电流幅值增加,避雷针长度、引雷塔高度对击距的影响更加明显。通过与现有击距公式计算结果进行对比,验证了算法的准确性。In order to analyze the influence rule of lightning tower on lightning strike trip of transmission line with electric geometric model, the striking distance of lightning tower needs to be calculated. Based on the leader progression model, considering the positive upward leader initiation and development process, as well as the charge amount and distribution characteristics in leader channel of negative ground flash, the finite element simulation calculation model of lightning tower flashing process was established. The striking distance of lightning tower with lightning rod was calculated. The influence of lighting tower height and lightning rod size on striking distance was analysed. Under the same current amplitude, the lightning strike distance is positively correlated with the length of the lightning rod and the height of the lightning tower. With the increase of the current amplitude, the influence of them on the impact distance is more obvious. By comparing with the existing striking distance formula, the accuracy of the algorithm is verified. The obtained striking distance formula can provide reference for the design and selection of transmission line lightning tower.

关 键 词：先导发展模型 引雷塔 避雷针 击距 有限元方法 

分 类 号：TM86[电气工程—高电压与绝缘技术] TB115[理学—数学]