电网技术2016，Vol.40Issue(12)：3951-3957,7.DOI:10.13335/j.1000-3673.pst.2016.12.044
±800kV特高压换流站支柱绝缘子自然积污特性
Contamination Accumulating Features of Post Insulators in ±800 kV UHVDC Convertor Station
摘要
Abstract
In order to investigate contamination accumulating features of post insulators in UHVDC convertor station,a natural contamination experiment was carried out at ±800kV Zhongzhou convertor station,Henan in 2014 and 2015.Experiment results indicate that insulator pollution levels is ranked as insulators not energized,energized with AC and energized with DC,from light to heavy degree.Pollution difference for porcelain insulators is not obvious.As for composite and RTV-coating insulators,those at negative pole line bear more severe pollution.Equivalent salt deposit density (ESDD) ratio of insulators at negative bus to those at positive bus is 2.4;non soluble deposit density (NSDD) ratio of insulators at negative bus to those at positive bus is 2.7.Regardless of negative or positive pole,pollution of porcelain insulators is the least,followed by composite insulators,and pollution of RTV-coating insulators is the most serious.In contaminants,major cations are Ca2+ and K+,major anions are NO3-and SO42-.Major soluble deposit is CaSO4 and nitrates.关键词
直流输电/换流站/绝缘子/自然积污/等值盐密Key words
DC transmission/convertor station/insulator/natural contamination/ESDD分类
信息技术与安全科学引用本文复制引用
李黎,华奎,李哲,刘泽辉,李瑶琴,卢明..±800kV特高压换流站支柱绝缘子自然积污特性[J].电网技术,2016,40(12):3951-3957,7.基金项目
国家电网公司重大基础前瞻科技项目(SG20141187).Project Supported by the Key Basic Prospective Science-Technology Program of State Grid Corporation of China (SG20141187) （SG20141187）
