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1、第32卷第3期深圳大學學報理工版Vo1．32No．32015年5月J0URNALOFSHENZHENUNIVERSITYSCIENCEANDENGINEERINGMav2015【電子與信息科學／ElectronicsandInformationScience】高壓輸電線下三維工頻電場的矩量法數(shù)學計算王敬曉，李斌，高艷霞深圳大學物理科學與技術(shù)學院，深圳518060摘要：基于模擬電荷法與矩量法，考慮弧垂和檔距等因素的影響，建立超高壓輸電線路工頻電場三維仿真計算模型，研究超高壓輸電線路工頻電場的分布．以500kV單回三相水平排列線路為例，對型號為4×LGJ一4
2、00／35(外徑為26．82mm，分裂間距為450mm)，懸掛點對地高度為20m，導線間距為8m，呈懸鏈線的導線進行模擬計算．結(jié)果表明，考慮導線弧垂后，隨著檔距增大，弧垂加大，導線對地距離減小，導線下方的場強增大．在垂直檔距中央的橫向分布上，懸鏈線模型與二維模型計算結(jié)果接近，曲線形狀基本一致．導線形狀的差異會導致沿導線走向的場強分布存在很大差異．研究可供電網(wǎng)建設(shè)和生產(chǎn)運行參考．關(guān)鍵詞：電磁學；工頻電場；模擬電荷法；矩量法；檔距；高壓輸電線路中圖分類號：TM743文獻標志碼：Adoi：10．3724／SP．J．1249．2015．03290Mathemat
3、icalcalculationof3DpowerfrequencyelectricfieldunderhighvoltagetransmissionlinesbasedonmomentmethodWangJingxiao，LiBin，andGaoYanxiaCollegeofPhysicsScienceandTechnology，ShenzhenUniversity，Shenzhen518060，P．R．ChinaAbstract：Byusingthechargesimulationandthemomentmethodandtakingtheeffect
4、sofsagandspanintoaccountaccordingtothepracticalengineeringcircumstances，weproposeasimulationmodeltoanalyzethethree—dimensionaldistributionofpowerfrequencyelectricfieldunderhighvoltagepowertransmissionlines．Thismodelisappliedonahorizontallyarranged500kVthree—phasesingleloopline，in
5、whichthewire(4×LGJ一400／35withouterdiameterof26．82mmandbundlespacingof450mm)issuspendedattheheightof20mincatenarywithwirespacingof8m．Simulationresultsshowthatthespanandsagincreasewiththedecreaseofdistancebetweenwiresandtheground，leadingtothestren~henedfieldintensityunderthewires．T
6、hetransversedistributionofthefieldintensityinthemiddleofspancalculatedbythefunicularcurvemodelisanalogoustothatbythetwo-dimensionalmode1．However．thefieldintensitydistributionalongthewirevariesaccordingtothedifferentshapesofwires．Thisresultcanofferguidanceforthepowergridconstructi
7、onandoperation．Keywords：electromagnetism；powerfrequencyelectricfield；chargesimulationmethod；themethodofmoments；span：highvoltagetransmissionlineReceived：2014．12-12：Accepted：2015．04．14Foundation：NationalNaturalScienceFoundationofChina(61275101)十Correspondingauthor：ProfessorGaoYanxi
8、a．E-mail：gyx@SZU．edu．cnCitation：WangJing
