高电压技术2013，Vol.39Issue(3)：526-533,8.DOI:10.3969/j.issn.1003-6520.2013.03.003
特高压交流输电线路绕击耐雷性能仿真分析
Simulated Analysis of Lightning Shielding Failure Performance of UHVAC Transmission Lines
摘要
Abstract
Accurately assessing the shielding performance of ultra high voltage(UHV) transmission lines has a great reference value for design and construction of lines. We introduced a method for analyzing the shielding failure rate (SFR) of UHV transmission lines based on leader progression model ( LPM) and three-dimensional dividing of shielding failure region, in which the actual arc sags and heights from local ground of transmission and grounding conductors in the areas were divided into any scale. To verify the method, the shielding failure trip rate(SFTR) of the 1 000 kV UHVAC demonstration line in China and its relation to shielding angel and slope gradient were calculated. Conclusions can be drawn as follows: the SFTR of the ZMP2 and ZBS2 towers in typical plain and mountainous terrain are 0.057 5 times/( 100 km·a ) and 0.032 2 times/( 100 km·a) , respectively, which are acceptable for safe operation of UHV transmission lines in China; the SFTR can be lowered by adjusting sags of the conductors; the conductors at outside of the mountain slope is easier to be struck, and the SFTR increases with shielding angle and slope gradient; the shielding failure under large current occurs far away from the lines.关键词
特高压/输电线路/绕击/先导发展模型/雷电屏蔽/跳闸率Key words
UHV/ transmission line [shielding failure/ leader progression model/ lightning protection/ shielding failure trip-out rate引用本文复制引用
姚陈果,王婷婷,杨庆,司马文霞..特高压交流输电线路绕击耐雷性能仿真分析[J].高电压技术,2013,39(3):526-533,8.基金项目
国家重点基础研究发展计划(973计划)(2009CB724504) （973计划）
国家自然科学基金(51177176). （51177176）
