高压电器2013，Vol.49Issue(4)：54-59,6.
±660 kV HVDC大跨越输电线路绕击耐雷性能研究
Shielding Failure Lightning Protection Performance Analysis of ±660kV HVDC Long Span Transmission Lines
摘要
Abstract
±660 kV HVDC transmission line is the world's first line in this voltage grade. The lightning protection performance of long span line is the relatively weaker part in the whole transmission line. So it is necessary to carry out a more detailed investigation. In this paper, an improved EGM is proposed to evaluate the shielding failure trip-out rate of ±660 kV HVDC transmission line. The striking distances to conductors, shield wires and ground are differentiated. Furthermore,the influences of ground obliquity, wind deflection and operating voltage of phase conductors are taken into account. The simulation results show that the impacts of conductor voltage to the shielding failure trip-out rate decrease with the increasing ground obliquity. But the impacts should not be ignored and the conductor should be considered. Also, the shielding failure rate accelerates with the increase of the ground obliquity and the wind speed. When the ground obliquity is more than 20° and the wind speed is more than 20 m/s,the shielding trip-out failure rate of long span transmission line exceeds the indicator 0.1 times/(100km.a). Furthermore, given the long span transmission lines generally lie in bad geographical and climatic conditions, thus it is critical to take effective lightning protection measures to improve the shielding failure lightning protection performance.关键词
±660 kV线路/大跨越/HVDC/电气几何模型/绕击跳闸率Key words
±660 kV transmission line/long span/HVDC/EGM/shielding failure trip-out rate分类
信息技术与安全科学引用本文复制引用
袁海燕,逯怀东,姚金霞,庄燕飞..±660 kV HVDC大跨越输电线路绕击耐雷性能研究[J].高压电器,2013,49(4):54-59,6.基金项目
山东电力集团公司电力科学研究院基金项目(KY2013-10). （KY2013-10）
