高电压技术
高電壓技術
고전압기술
HIGH VOLTAGE ENGINEERING
2012年
10期
2568-2574
,共7页
张楚岩%关志成%张福增%王黎明
張楚巖%關誌成%張福增%王黎明
장초암%관지성%장복증%왕려명
支柱绝缘子%污闪特性%高海拔地区%特高压直流%全尺寸试品%外绝缘%人工污秽试验
支柱絕緣子%汙閃特性%高海拔地區%特高壓直流%全呎吋試品%外絕緣%人工汙穢試驗
지주절연자%오섬특성%고해발지구%특고압직류%전척촌시품%외절연%인공오예시험
post insulator%pollution flashover performance%high altitude area%UHVDC%full-size insulator%external insulation%artificial contamination test
支柱绝缘子作为换流站必不可少的绝缘配件,研究其外绝缘性能有重要意义。为此,总结了国内外关于换流站支柱绝缘子的污秽外绝缘特性研究工作,并结合我国特高压直流输电工程面临的特有技术问题,在实际高海拔地区对特高压直流全尺寸支柱绝缘子试品进行了人工污秽试验研究。试验分别得到了瓷和复合2种材质的换流站支柱绝缘子在不同污秽度条件下的50%污耐受电压曲线,并与相同污秽度条件下的污雨闪电压进行了对比,最后将该试验结果与不同单位的研究成果进行了比较。研究表明：直径及伞形结构对支柱瓷绝缘子的污闪特性有明显影响;支柱绝缘子的污闪电压与串长近似呈线性关系;支柱绝缘子的污雨闪电压高于其相同污秽条件下的污闪电压,因此支柱绝缘子的外绝缘设计应以污闪电压为主。
支柱絕緣子作為換流站必不可少的絕緣配件,研究其外絕緣性能有重要意義。為此,總結瞭國內外關于換流站支柱絕緣子的汙穢外絕緣特性研究工作,併結閤我國特高壓直流輸電工程麵臨的特有技術問題,在實際高海拔地區對特高壓直流全呎吋支柱絕緣子試品進行瞭人工汙穢試驗研究。試驗分彆得到瞭瓷和複閤2種材質的換流站支柱絕緣子在不同汙穢度條件下的50%汙耐受電壓麯線,併與相同汙穢度條件下的汙雨閃電壓進行瞭對比,最後將該試驗結果與不同單位的研究成果進行瞭比較。研究錶明：直徑及傘形結構對支柱瓷絕緣子的汙閃特性有明顯影響;支柱絕緣子的汙閃電壓與串長近似呈線性關繫;支柱絕緣子的汙雨閃電壓高于其相同汙穢條件下的汙閃電壓,因此支柱絕緣子的外絕緣設計應以汙閃電壓為主。
지주절연자작위환류참필불가소적절연배건,연구기외절연성능유중요의의。위차,총결료국내외관우환류참지주절연자적오예외절연특성연구공작,병결합아국특고압직류수전공정면림적특유기술문제,재실제고해발지구대특고압직류전척촌지주절연자시품진행료인공오예시험연구。시험분별득도료자화복합2충재질적환류참지주절연자재불동오예도조건하적50%오내수전압곡선,병여상동오예도조건하적오우섬전압진행료대비,최후장해시험결과여불동단위적연구성과진행료비교。연구표명：직경급산형결구대지주자절연자적오섬특성유명현영향;지주절연자적오섬전압여천장근사정선성관계;지주절연자적오우섬전압고우기상동오예조건하적오섬전압,인차지주절연자적외절연설계응이오섬전압위주。
In this paper,the previous research work of the polluted outdoor insulating performance of converter stations post insulators is summarized.Moreover,according to the peculiar technology problems of UHV DC projects' external insulation in China,such as high altitude and heavy pollution etc.,the pollution flashover performances of full-size ±800 kV post insulators made of both porcelain and composite for UHVDC converter stations are reported and investigated by artificial contamination tests at actual high altitude area.Furthermore,the pollution flashover voltages of post insulators in fog and under rain in the same pollution level conditions are compared.Meanwhile,discussion and comparison are presented for the research results of previous work and this paper.The results of artificial contamination tests show that the rod diameter and the shed configuration has a significant influence on pollution flashover performance of post insulator;the relationship between the pollution flashover voltage and the insulation distance is approximately linear at actual high altitude area for post insulators;the outdoor insulation design of post insulators should give priority to the pollution flashover voltages in fog,since the voltages are lower in rain.
