《高压输电线下三维工频电场的矩量法数学计算》.pdf

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1、第32卷第3期深圳大学学报理工版Vo1．32No．32015年5月J0URNALOFSHENZHENUNIVERSITYSCIENCEANDENGINEERINGMav2015【电子与信息科学／ElectronicsandInformationScience】高压输电线下三维工频电场的矩量法数学计算王敬晓，李斌，高艳霞深圳大学物理科学与技术学院，深圳518060摘要：基于模拟电荷法与矩量法，考虑弧垂和档距等因素的影响，建立超高压输电线路工频电场三维仿真计算模型，研究超高压输电线路工频电场的分布．以500kV单回三相水平排列线路为例，对型号为4×LGJ一4

2、00／35(外径为26．82mm，分裂间距为450mm)，悬挂点对地高度为20m，导线间距为8m，呈悬链线的导线进行模拟计算．结果表明，考虑导线弧垂后，随着档距增大，弧垂加大，导线对地距离减小，导线下方的场强增大．在垂直档距中央的横向分布上，悬链线模型与二维模型计算结果接近，曲线形状基本一致．导线形状的差异会导致沿导线走向的场强分布存在很大差异．研究可供电网建设和生产运行参考．关键词：电磁学；工频电场；模拟电荷法；矩量法；档距；高压输电线路中图分类号：TM743文献标志码：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