线路避雷器提高超高压大跨越架空线路绕击耐雷水平的仿真研究.pdf

第 41 卷 第 1 期：63-68 高电压技术 Vol.41, No.1: 63-68 2015 年 1 月 31 日 High Voltage Engineering January 31, 2015 DOI: 10.13336/j.1003-6520.hve.2015.01.009 线路避雷器提高超高压大跨越架空线路绕击耐雷 水平的仿真研究 田 洪，王 宁，陈天翔，张 辑，吴 燕 361024 （厦门理工学院电气工程与自动化学院，厦门 ） 摘 要：为研究加装线路避雷器对提高超高压大跨越段绕击耐雷水平的有效性，参照官亭—兰州东750 kV 输电线 路实际参数，建立了雷电流、输电线路、杆塔、绝缘子串和线路避雷器的 EMTP–RV 仿真模型，分析了不同雷击 位置、不同避雷器装设方案、不同杆塔接地电阻对耐雷水平的影响。仿真结果表明：在跨越段两端各加装 1 组线 路避雷器可将线路整体绕击耐雷水平提高至 81~119 kA，远远超过理论最大绕击雷电流 30 kA，并克服了接地电阻 的影响，其中本基塔绝缘子被完全保护，但附近杆塔上绝缘子获得的保护作用有所弱化，若要实现完全保护，则 需在跨越段两端及其相邻杆塔上都加装线路避雷器。 关键词：线路避雷器；大跨越段；超高压；架空线路；绕击耐雷水平；EMPT-RV Simulation Research on Improvement of Lightning Shielding Level of Long Spans of EHV Overhead Lines by Installing Surge Arresters TIAN Hong, WANG Ning, CHEN Tianxiang, ZHANG Ji, WU Yan (School of Electrical Engineering and Automation, Xiamen University of Technology, Xiamen 361024, China) Abstract ：To study the effect of surge arrester installation on improving the lightning shielding level of long spans of EHV transmission lines, we established EMTP-RV simulation models of lightning current source, transmission lines, towers, insulator strings, and line arresters based on the actual parameters of Guanting-East Lanzhou 750 kV transmission line. Factors, such as grounding resistance, location of lightning, distribution of surge arresters installation, which could affect the minimum shielding failure current to cause flashover, were analyzed. The simulation results show that installing surge arresters at each end of the long span to three p