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ID:39867469
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时间:2019-07-13
《特高压直流输电线路污秽外绝缘设计及配置》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、万方数据第34卷第5期·862·2008年5月高电压技术HighVoltageEngineeringV01.34No.5May2008特高压直流输电线路污秽外绝缘设计及配置吴光亚1,郭贤珊2,张锐1(1.国网武汉高压研究院,武汉430074;2.国家电网公司,北京100031)摘要:针对污秽外绝缘设计是士800kV直流工程关键技术问题之一,提出了对土800kV直流输电线路绝缘子串进行污秽外绝缘设计考虑现场污秽度校正、NSDD校正及采用污耐压方法进行污秽外绝缘设计的方法;根据瓷、玻璃绝缘子的污耐压曲线对+800kV直流输电线路“l”型绝缘子串进行了污秽外绝缘设计。结果表明,在轻污秽度
2、等级下,采用210kN盘形悬式绝缘子,按爬电距离等同原则换算需64片,按结构高度等同原则换算需67片。关键词:特高压;绝缘子;土800kV直流,输电线路;污秽}外绝缘中图分类号:TM853文献标志码:A文章编号:1003—6520【2008105—0862—05PollutionExternalInsulationDesignandArrangementofUHVDCTransmissionLineWUGuang—yal,GUOXian—shan2。ZHANGRuil(1.WuhanHighVoltageResearchInstituteofSGCC,Wuhan430074,Chi
3、na;2.StateGridCorporationofChina,Beijing100031,China)Abstract:Onthebasisofdataandanti—pollutiontechnologyknowledge-lotsoftechnologyresearchresults,suchasthecorrectionofSPS-thecorrectionofNSDDandSOonshouldbeconsideredin800kVUHVDCtransmissionlineexternalinsulationdesignandarrangement.Theexternal
4、insulationdesignfor士800kVUHVDctransmissionline”I”insulatorsstringispresentedonthebasisofresearchdata-correctionandpollutionwithstandvoltagecurveofceramicandglassinsulators.Theresearchresultsindicatethat64units210kNcapandpininsulatorsareusedfor”I”insulatorsstringinlightpollutionclassaccordingtO
5、theprincipleofsamecreepagedistance。and67units210kNcapandpininsulatorsareusedaccordingtOprincipleofthesamestructureheight.Ifcompositeinsulatorisused,thecompositeinsulatorstructureheightandcreepagedistancearesuggestedtObe80percentlengthof210kNcapandpininsulators.Theexternalinsulationarrangementd
6、esigninmuchlightpollutionclassshouldbesameaslightpollutionclass.Forexampletthecompositeinsulatorcreepagedistanceis10880mmandspecificcreepagedistanceis43.1mm/kVinlightandmiddlepollutionclassaccordingtOtheprincipleofsamecreepagedistance-andcreepagedistanceis1390mmandspecificcreepagedistanceis45.
7、4mm/kVaccordingtOtheprincipleofsamestructureheight.Keywords:UHV;insulator;±800kVDC;transmissionline;pollution;externalinsulation0引言±800kV直流输电由于具有远距离、大容量和低损耗等优点已成为我国特高压输电工程发展方向。目前,我国已规划了多条±800kV直流输电工程口q]。污秽外绝缘设计直接与±800kV直流输电工程的技术经济可靠性相关,
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