输电线路杆塔接地电阻对线路反击跳闸率影响研究  

Study on Influence of Grounding Resistance of Transmission Line Tower on Counterattack Trip-out Rate

作　　者：胡金殿 王恒康 赵宇欣 徐敏杰 Hu Jindian;Wang Hengkang;Zhao Yuxin;Xu Minjie(Lijiang Electric Power Supply Company,Yunnan Power Grid Co.,Ltd.,Lingjiang 674100,Yunan,China;Yunnan Yutian Lightning Protection Material Co.,Ltd.,Kunming 650000,Yunnan,China)

机构地区：[1]云南电网有限责任公司丽江供电局,云南丽江674100 [2]云南宇恬防雷材料有限公司,云南昆明650000

出　　处：《四川电力技术》2019年第6期14-18,共5页Sichuan Electric Power Technology

摘　　要：随着输电线路建设运行规模的不断扩大,同一走廊的输电线路杆塔包含不同类型的塔头,从而导致杆塔不同类型塔头可能处于不同大气环境和土壤环境中,其接地电阻存在很大差异,因此有必要对不同塔头类型的杆塔在不同接地电阻值下的耐雷水平和反击跳闸率影响进行研究。建立了猫头塔、酒杯塔、鼓型塔等3种500 kV交流输电线路杆塔的反击闪络模型,并研究了3种塔头模型的杆塔接地电阻对线路反击耐雷性能的影响规律:酒杯塔与鼓型双回闪络规律类似,对鼓型单回闪络线路的影响最大,其次是鼓型双回闪络线路和酒杯塔,影响最小的是猫头塔。Due to the expansion of EHV/UHV transmission lines,the probability of lightning strike on the line is increased,and the tower of the same line may be in different working environment.Therefore,it is necessary to study the influence of grounding resistance on lightning resistance performance of the lines.The back-flashover model for three kinds of towers are established,such as cat-head type tower,cup type tower and drum-shaped tower of 500 kV AC transmission lines.The influence regularity of grounding resistance of three models on lightning back-flashover performance is analyzed,that is,the flashover rules of cup type tower is similar to the drum-shaped double-circuit tower,and it has the greatest influence on the drum-shaped single-loop,followed by the drum-shaped double-circuit and the cup type tower,and it has the least influence on the cat-head type tower.

关 键 词：猫头塔 酒杯塔 同塔双回鼓型塔 接地电阻 反击跳闸率 

分 类 号：TM933[电气工程—电力电子与电力传动]