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ID:19376796
大小:3.55 MB
页数:7页
时间:2018-10-01
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1、第卷第期电测与仪表ElectricalMeasurement&Instrumentation年第期PLC辐射干扰测量的外推因子研究*陆阳1,付伟龙2(1中国电力科学研究院,北京100192,2中国传媒大学信息工程学院,北京100024)摘要:在研究电力线载波(PowerLineCarrier,PLC)通信(PowerLineCommunication,PLC)系统辐射干扰的过程中,为了将辐射信号场强与电磁兼容(ElectroMagneticCompatibility,EMC)标准中规定的限值线进行比较,需要利用外推因子把实际测量距离下测得的辐
2、射信号场强转化为标准测量距离下的对应值。本文基于赫兹偶极子与麦克斯韦方程组推导了在150kHz-30MHz频率等级上的电力线辐射外推因子,理论结果显示从大于3m的实际测量距离向3m标准测量距离转化的外推因子随频率的增大呈现出减小趋势。在此基础上,提出了适用于150kHz-30MHz频率等级的PLC辐射干扰测量方案,并在屏蔽室内进行了辐射干扰测量。研究表明,基于测量结果得到的外推因子与理论分析结果基本吻合。关键词:电力线载波通信;电磁兼容;辐射干扰测量;外推因子中图分类号:TM93文献标识码:B文章编号:1001-1390(2014)00-00
3、00-00ResearchontheExtrapolationFactorforPLCRadiationMeasurementsLUYang1,FUWei-long2(1.ChinaElectricPowerResearchInstitute,Beijing100192,China.2.InformationEngineeringSchool,CommunicationUniversityofChina,Beijing100024,China)Abstract:Theradiationintensityobtainedinrealmeasur
4、ingdistanceneedstobeconvertedtothecorrespondingvalueinstandardmeasuringdistancebasedontheextrapolationfactor,soastocompareInordertocomparetheradiationmeasurementsinPowerLineCarrierCommunication(PLC)communicationsystemswiththelimitlinesspecifiedintheElectroMagneticCompatibil
5、ity(EMC)standards,thedetectedradiationintensityintheactualmeasurementdistanceneedstobeconvertedtothatinthenormativedistancebyusingtheextrapolationfactor.Thepowerlineradiationextrapolationfactorwithinthefrequencyrangefrom150kHzto30MHzhasbeenderivedbasedonThispaperderivesthee
6、xtrapolationfactorforPLCradiationmeasurementswithinthefrequencyrangefrom150kHzto30MHzbasedontheHertziandipoleandMAXWELL’sequations.Thetheoreticalresultsshowthattheextrapolationfactorwilldecreasewiththefrequencyincreasingwhenitconvertsfromtherealmeasuringdistancethatislarger
7、than3mtothestandardmeasuringdistance.fromtheactualdistancelargerthan3mtothenormativedistance3mwilldecreasewiththeincreaseoffrequencies.Moreover,anaPLCradiationmeasurementschemeexperimentalapproachforPLCradiationmeasurementwhichisappropriateinsinthefrequencyrangefrom150kHzto
8、30MHzishasbeenproposedandperformedintheshieldedroom.Theanalysisresultsshowsthatthe
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