采用Rogowski线圈的PFN脉冲大电流测量技术

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1、维普资讯http://www.cqvip.com第33卷第7期高电压技术Vo1．33NO．7·84·2007年7月HighVoltageEngineeringJuly2007采用Rogowski线圈的PFN脉冲大电流测量技术钟和清，张华，戴玲，林福昌，邹云屏，何俊佳(华中科技大学电气与电子工程学院，武汉430074)摘要：为准确测量脉冲成形网络PFN中的脉冲大电流，建立了测量系统中所使用的Rogowski线圈的数学模型，并通过对其数学模型的频域分析，给出了外积分型Rogowski线圈采样电阻的选取方法。同时为使采用外积分型Rogowski线圈的测量系统获得良好的频域特性，

2、给出了一种改进型一次积分电路，并通过MATLAB软件仿真，比较了采用改进型积分电路和普通RC无源积分电路下系统的频域特性。仿真和实验的结果表明，采用所给的改进型一次积分电路能够扩宽整个测量系统的频带以及提高测量系统的灵敏度。关键词：脉冲成形网络；脉冲电流测量；Rogowski线圈；幅频特性；频带；采样电阻；灵敏度中图分类号：TM835．2；TM452文献标志码：A文章编号：1003—6520(2007)07—0084—04MeasurementTechnologyforPulsedHiglaCurrentofPFNUsingRogowskiCoilZHONGHe—qing

3、，ZHANGHua，DAILing，LINFu—chang，ZOUYun-ping，HEJun-jia(CollegeofElectricalandElectronicEngineering，HuazhongUniversityofScienceandTechnology，Wuhan430074，China)Abstract：PFNiswidelyusedinmode／Tlscienceandtechnology，suchasintheresearchofITERandelectrothermalchemicallaunchtechnologY．Inordertoaccu

4、ratelymeasurethepulsedhighcurrentinPFN-themathematicalmodelofRogowskicoilwhichhasbeenusedinthemeasurementsystemisestablished．Byanalyzingitsmathematicalmod‘elinfrequency-domain-themethodforchoosingthesamplingresistanceoftheouter-integratorRogowskicoilispresented．Inordertoensurethemeasureme

5、ntsystemtogaintheoptimumfrequencydomaincharacteristic，flkindofimprovedprimaryintegralcircuitisproposed．ByusingtheMATLABsoftwaretosimulatethesystemundertWOdifferentintegralcircuitsthatareimprovedprimaryintegralcircuitandnormalRCintegralcircuitwithoutpowersource，thefrequencyresponsebetweent

6、WOkindsofmeasurementsystemsiscompared．Theschematicofexperi—mentalsystemisgivenandtheprincipleoftheexperimentalsystemisintroducedinthepaper．ThesimUlationre‘suitsandexperimentalresultsareillustratedrespectively．Itcanbeseenthatthebandwidthoffrequencyofthewholemeasuringcircuitisexpandedandthe

7、sensitivityofthesystemformeasurementisincreasedbyusingim‘provedprimaryintegralcircuit．Itisalsoprovedthatthevaluesofsamplingresistanceandintegralparametersusingintheexperimentalsystemarecorrectandreasonablefromtheexperimentalresults．Themethodforchoosingthesamplingres