±800kV特高压宾金直流悬式及支柱绝缘子自然积污特性  

Test Research on Natural Contamination Performance of Suspension and Post Insulators From ±800kV Yibin-Jinhua UHVDC Transmission Project

作　　者：李特 王少华 柳青山 朱亦振 胡文堂 刘黎 刘泽辉 

机构地区：[1]国网浙江省电力公司电力科学研究院,浙江省杭州市310014 [2]国网浙江省电力公司衢州供电公司,浙江省衢州市318000 [3]国网浙江省电力公司金华供电公司,浙江省金华市314000 [4]国网河南省电力公司电力科学研究院,河南省郑州市450001

出　　处：《电网技术》2017年第11期3553-3558,共6页Power System Technology

基　　金：国家电网公司科技项目(52170216000D)~~

摘　　要：为研究特高压直流输变电设备外绝缘积污特性,利用特高压直流宾金线和金华换流站设置带电、不带电绝缘子污秽测点,经过1a完整积污后,对试验绝缘子上、下表面盐密(equivalent salt deposit density,ESDD)、灰密(non-soluble deposit density,NSDD)进行了测试、分析,结果表明,特高压直流电场显著加剧高电位绝缘子积污,宾金线带电绝缘子盐密、灰密分别为不带电绝缘子相应值的1.52、1.86倍;金华换流站被测支柱绝缘子高压端盐密、灰密分别是其中部、低压端均值的1.45、1.27倍;电压极性对悬式、支柱绝缘子积污均无显著影响;与站内复合支柱绝缘子相比,悬式绝缘子上、下表面积污差异更为显著。In order to research natural pollution characteristics of external insulation of UHVDC transmission and transformation equipment,energized and non-energized test insulators were installed on Yibin-Jinhua transmission line and Jinhua convertor station.After complete one year pollution deposition period,equivalent salt deposit density（ESDD） and non-soluble deposit density（NSDD） on upper and lower surface of the insulators were measured and analyzed.Results indicated that UHVDC electrical field enhanced pollution of the energized insulators apparently.ESDD and NSDD of the energized insulators on the line were 1.52 and 1.86 times of those of non-energized insulators respectively.ESDD and NSDD values of composite post insulator under ±800 kV potential position were 1.45 and 1.27 times of those of rest parts.Influence of potential polarity on both suspension and post insulators were not obvious.Compared to composite post insulator,difference of pollution between upper and lower surfaces of suspension insulators was much more notable.

关 键 词：特高压直流 自然积污 带电系数 灰盐比 积污不均匀度 

分 类 号：TM86[电气工程—高电压与绝缘技术]