基于脱冰跳跃和电晕条件下的特重冰区特高压交流输电线路地线支架高度研究  

Study on the Height of Ground Support for UHV AC Transmission Lines Based on Ice-Shedding and Corona Effects in Extra Heavy Icing Area

作　　者：马海木呷 刘炯 梁明 李鑫 MA HAI Muga;LIU Jiong;LIANG Ming;LI Xin(Southwest Electric Power Design Institute Co.,Ltd.of CPECC,Chengdu 610056,China)

机构地区：[1]中国电力工程顾问集团西南电力设计院有限公司,四川成都610056

出　　处：《电工技术》2023年第15期195-199,202,共6页Electric Engineering

摘　　要：为减少脱冰跳跃和电晕对特重冰区特高压交流输电线路安全稳定运行的不利影响,需分析地线支架高度的制约因素并合理确定其高度。对40 mm、60 mm特重冰区特高压交流输电线路导地线脱冰跳跃、地线电晕、线间距离、保护角、水平偏移等方面进行分析,提出1000 kV特高压交流输电线路地线支架高度制约因素、计算方法及结论。经研究,在40 mm、60 mm特重冰区,1000 kV特高压交流输电线路耐张塔脱冰跳跃控制的地线支架高度小于电晕控制条件下的地线支架高度,地线支架高度主要由地线电晕条件控制。40 mm冰区耐张塔地线支架高度不小于16 m,60 mm冰区耐张塔地线支架高度不小于16 m。In order to reduce the adverse effects of ice-shedding and corona on the safe and stable operation of UHV AC transmission lines in the extra heavy icing area,it is necessary to analyze the restrictive factors of the height of ground support and determine its height reasonably.The ice-shedding jump,ground wire corona,interline distance,protection angle,and horizontal offset of UHV AC transmission lines in 40 mm and 60 mm ultra-heavy ice areas are analyzed.The height constraints,calculation methods and conclusions of ground bracket of 1000 kV UHV AC transmission line are proposed.According to the research,in the 40mm and 60 mm extra heavy icing area,the height of ground support for the ice-shedding control of strain tower of 1000 kV UHV AC transmission line is less than that under corona effects,and the height of ground support is mainly controlled by Ground wire corona condition.The height of strain tower ground wire support in 40mm ice area is not less than 16m,and the height of strain tower ground wire support in 60 mm ice area is not less than 16 m.

关 键 词：特高压 重冰区 电晕效应 脱冰跳跃 

分 类 号：TM92[电气工程—电力电子与电力传动]