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1、第35卷第3期电网技术Vol.35No.32011年3月PowerSystemTechnologyMar.2011文章编号:1000-3673(2011)03-0159-06中图分类号:TM15文献标志码:A学科代码:470·4014高压输电导线三维工频电磁场计算与测量11213陈楠,文习山,刘波,蓝磊,李晔(1.武汉大学电气工程学院,湖北省武汉市430072;2.襄樊供电公司调度通信中心,湖北省襄樊市441000;3.宁夏电力科学研究院,宁夏回族自治区银川市750002)CalculationandMeasurementofThree-DimensionalPowerFrequencyE
2、lectricalandMagneticFieldUnderTransmissionLine11213CHENNan,WENXishan,LIUBo,LANLei,LIYe(1.SchoolofElectricalEngineering,WuhanUniversity,Wuhan430072,HubeiProvince,China;2.DispatchandCommunicationCenterofXiangfanElectricPowerCompany,Xiangfan441000,HubeiProvince,China;3.NingxiaElectricPowerResearchIns
3、titute,Yinchuan750002,NingxiaHuiAutonomousRegion,China)ABSTRACT:Tocalculatepowerfrequencyelectricand场分布,结果表明,在垂直档距中央的横向分布上,三维模magneticfields(PFEMF)generatedbyhighvoltage型计算结果与二维模型导线计算高度取最小对地高度时的transmissionlineorspace-crossingtransmissionlines计算结果十分接近,且均与实测值比较吻合;交叉跨越导线accurately,basedonchargesimul
4、ationmethod(CSM)and下方交叉点投影位置,工频电磁场计算值与测量值也吻合较Biot-Savarttheorem,auniversalmodeltocalculatethree好,验证了交叉跨越导线计算模型的有效性。此外,分析了dimensionalPFEMFisbuiltaccordingtocatenaryequation,导线下方工频电磁场计算值与测量值的误差来源,着重讨论thenthedistributionofPFEMFunderordinary330kVdouble了影响三维计算模型计算结果的相关因素,给出了导体线单circuittransmissionlineo
5、nthesametowerandthatunderthe元剖分段数的合理值。crossingtransmissionlinesarecalculatedandmeasured.Calculationandmeasurementresultsshowthatasforthe关键词:高压输电导线;工频电磁场;悬链线;交叉跨越;transversedistributionofPFEMFalongthemeasuredpoints现场测量;模拟电荷法perpendiculartothemidspan,theresultscalculatedby0引言three-dimensionalmodelun
6、derthecalculationheightoftheconductorthatischosenastheminimumheightaboveground高压输电线路地面电磁场强度是确定线路最areveryclosetothosecalculatedbytwo-dimensionalmodel小对地高度及划定线路走廊宽度的重要依据[1-3]。随andareclosetothemeasuredresultsaswell;attheprojection着公众环保意识的加强,对导线工频电磁场的准确beneaththecrossingpointofcrossingtransmissionline
7、s,the计算越发具有重要意义。目前计算导线工频电磁场calculationresultsofPFEMFareclosetothemeasuredresults,的方法有很多,但大多采用二维计算模型,将导线thustheeffectivenessoftheproposedcalculationmodelofcrossingtransmissionlinesisverified.Thecausesleadingto视为与地