交流特高压支柱瓷绝缘子的自然积污特性研究  

Studyon Natural Contamination Characteristics of UHV AC Post Porcelain Insulator

作　　者：张锐[1] 黄道春[2] 吴光亚[1] 袁田[1] 

机构地区：[1]中国电力科学研究院,湖北省武汉市430074 [2]武汉大学电气工程学院,湖北省武汉市430072

出　　处：《电网技术》2014年第11期3217-3223,共7页Power System Technology

基　　金：国家电网公司重点科技项目(SGTGY[2009]671)~~

摘　　要：为研究特高压支柱瓷绝缘子的自然积污规律,重点对荆门特高压变电站运行的支柱瓷绝缘子进行了连续3 a的积污检测。测量了盐密(equivalent salt deposit density,ESDD)、灰密(non soluble deposit density,NSDD)及污秽成分,对比分析了伞裙上表面与下表面、迎风面与背风面、平均直径、连续积污等对支柱绝缘子自然积污特性的影响规律。结果表明,1 a的积污期条件下(2010年4月至2011年4月):1)单个1000k V支柱瓷绝缘子整柱污秽分布较不均匀,高压端与其他部位的ESDD平均比值为3.4,NSDD平均比值为2.3。2)绝缘子伞裙上表面污秽度普遍高于下表面。上下表面ESDD不均匀积污比平均为1.8,上下表面NSDD不均匀积污比平均为1.6。3)绝缘子伞裙背风面污秽度普遍高于迎风面。ESDD迎风面与背风面不均匀积污比平均为0.64,NSDD迎风面与背风面不均匀积污比平均为0.55。4)饱和ESDD与连续积污时间不成正比关系,而NSDD基本与连续积污时间成正比关系。5)ESDD和NSDD随平均直径的增大呈下降趋势。6)绝缘子表面污秽物中CaS O4含量平均为68%。研究结果可为我国特高压工程外绝缘设计、产品制造和运行检修提供参考。In order tostudy the natural contamination characteristics of UHV post porcelain insulator,the contaminant accumulation measurement of UHV post porcelain insulators being put into operation in Jingmen UHVAC substation was performed continuously in three years.The equivalent salt deposit density（ESDD） and non soluble deposit density（NSDD） as well as the pollution components were measured,and the influencing rules of such factors as the top surface and the bottom surface of insulator shed,the windward side and the leeward side of insulator shed,the average diameter and continuous contaminant accumulation on natural contamination characteristics of 1000 k V AC post porcelain insulators were compared and analyzed,and under the condition of contaminant accumulation period of one year,i.e.,form April 2010 to April 2011,following results were obtained：firstly,as for the single 1000 kV post porcelain insulator the overall pollution distribution is non-uniform,the average ratio of NSDD at high voltage end to that of other parts is 3.4 and the average ratio of ESDD at high voltage end to that of other parts is 2.3;secondly,in general the polluted extent of the top shed surface of insulator is more serious than that on the bottom shed surface of insulator,the average value of uneven contaminant accumulation ratio of ESDD of the top surface of the shed to that on the bottom surface of the shed（T/B） is 1.8 and the average value of the uneven contaminant accumulation ratio of NSDD on the top shed surface to that on the bottom shed surface（T/B） is 1.6;thirdly,in general the polluted extent at the leeward side of insulator is more serious than that at the windward side of insulator,the average value of the uneven contaminant accumulation ratio of NSDD at the windward side of insulator to that at the leeward side of insulator（W/L） is 0.64 and the average value of the uneven contaminant accumulation ratio of ESDD at the windward side of insulatorto that at the leeward side of insulator（W/L） is 0.55;fourth

关 键 词：特高压支柱瓷绝缘子 污秽度测量 自然积污特性 盐密 灰密 上下表面不均匀积污比(T/B) 迎风面与背风面积污比(W/L) 

分 类 号：TM86[电气工程—高电压与绝缘技术]