高电压技术2017，Vol.43Issue(10)：3208-3214,7.DOI:10.13336/j.1003-6520.hve.20170925009
雨水分布状态对±1100kV平波电抗器表面电场的影响
Effect of Rain Distribution on Surface Electric Field of ± 1 100 kV Smoothing Reactor
摘要
Abstract
To optimize external insulation configuration of a smoothing reactor,we established a 3-D finite element analysis model of smoothing reactor based on the structural characteristics of ±1 100 kV oblique dry-type smoothing reactor.The distribution of electric field on the grading ring and insulator surfaces under dry and different rain distributions was calculated and analyzed.The results show that the electric field intensity of the smoothing reactor,especially the lowest grading ring,is obviously increased,and the discharge is more likely to occur.Moreover,a rain experimental platform was set up in Changping UHV test base in Beijing,and the insulation characteristics of the smoothing reactor under dry and rain conditions were tested.The experimental results show that the switching impulse voltage decreases under wet condition and the initial discharge positions concentrate on the lowest grading ring of the smoothing reactor,which is basically in accordance with the calculated results.Therefore,by using the method,the performances of external insulation can be improved by increasing the diameter of the lowest grading ring of the smoothing reactor from 200 mm to 300 mm;the maximum electric field of the grading ring is reduced by about 10％.关键词
特高压直流/平波电抗器/电场分布/均压特性/淋雨状态Key words
UHVDC/smoothing reactor/electric field distribution/voltage sharing characteristics/rain state引用本文复制引用
王平,赵映宇,律方成,王鑫,丁玉剑,毛艳..雨水分布状态对±1100kV平波电抗器表面电场的影响[J].高电压技术,2017,43(10):3208-3214,7.基金项目
国家重点研发计划(2016YFB0900802).Project supported by National Key Research and Development Program(2016YFB0900802). （2016YFB0900802）
