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《特高压直流输电山区线路Z型杆塔与T型杆塔的比较.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、第36卷第3期电网技术Vol
2、36No.32012年3月PowerSystemTechnologyMar.2012文章编号:1000—3673(2012)03.0028—06中图分类号:TM863文献标志码:A学科代码:470·4034特高压直流输电山区线路Z型杆塔与T型杆塔的比较万亦如,陈稼苗2,周浩,张彤2,苏菲,沈志恒,陆海清(1.浙江大学电气工程学院,浙江省杭州市310027;2.浙江省电力设计院,浙江省杭州市310014)ComparativeResearchonZ·TypeTowerandTraditionalT-TypeTow
3、erforUHVDCTransmissionLinesLocatedatMountainAreasWANYiru,CHENJiamiao。ZHOUHao,ZHANGTong,SUFei,SHENZhiheng,LUHaiqing,(1.SchoolofElectricalEngineering,ZhejiangUniversity,Hangzhou310027,ZhejiangProvince,China;2.ZhejiangElectricPowerDesignInstitute,Hangzhou310014,ZhejiangProvin
4、ce,China)ABSTRACT:UHVDCtransmissionlinesinChinahavetoflashover;electromagneticenvironmentpassthroughalotofmountainousregionswherelightning摘要:我国特高压直流输电工程途经大量山地,雷电活动频strokesfrequentlyoccur~thustheshieldingfailureoutagerate繁,而常规T型塔在山区的绕击跳闸率较高,为此针对溪ofUHVDCtransmissionlineadopt
5、ingconventionalT-type洛渡一浙西特高压直流输电山区线路设计了一种新型杆塔towersandpassingthroughmountainousregionishigh.Forfz型塔)。针对Z型塔,对比T型塔,采用改进电气几何模thisreason,anewtypeoftowerpossessinganewtypeoftower型与ATP.EMTP软件,计算分析了反击、绕击耐雷性能及head,namelytheZ—typetower,isdesignedforthepartof其影响因素,同时采用CDEGS软件结合公式法对
6、z型塔的UHVDCtransmissionlinefromXiluodutoZhexi.which电磁环境做了评估。结果表明:Z型塔的反击耐雷水平很高,passesthroughmountainousregions.Thelightningwithstand绕击耐雷性能明显优于T型塔,因此Z型塔的整体防雷性performancesofbackflashoverandshieldingfailureofT-type能明显优于T型塔。在呼称高最小时z型塔各项电磁环境towerandZ—typetoweraswellastheirimpactin
7、gfactorsare参数均达标,且均优于T型塔。可见z型塔更适合在山区researchedbythesimulationinwhichthecalculationmodelof使用。shieldingfailureisestablishedbyelectricalgeometrymodelrEGM)andthecalculationmodelofbackflashoveris关键词:特高压直流输电;Z型塔;耐雷性能;绕击;反击;establishedbyATP—EMTP,meanwhilecombiningCDEGS电磁环境softwar
8、ewithformulamethodtheelectromagnetic0引言environmentofZ—typetowerisassessed.ResearchresultsshowthattheZ—typetower’Slightningwithstandperformancesof我国4-800kV特高压直流输电工程,线路绵延backflashoverishigh,thereforetheoveralllightningwithstand数千公里,途径大量山地丘陵。而目前,特高压直performanceofZ—typetoweris
9、evidentlybetterthanthatof流输电山区线路采用的塔型塔头均为常规的水平T-typetower.Underthelowestnominalheightofto
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