欢迎来到天天文库
浏览记录
ID:52492552
大小:435.08 KB
页数:7页
时间:2020-03-28
《电力电容器噪声辐射比的实验测量方法研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第33卷第4期电力电容器与无功补偿Vo1.33No.42012年8月PowerCapacitor&ReactivePowerCompensationAug.2012电力电容器噪声辐射比的实验测量方法研究程金英,李志远,崔鑫(合肥T业大学噪声振动工程研究所,安徽合肥230009)摘要:电力电容器是高压直流换流站中噪声源之一,如不很好地治理,它产生的噪声对社会环境会造成危害。因此,研究电容器噪声辐射比的实验测量方法,可以通过辐射比直接计算电容器的噪声,为电容器噪声估算提供依据。实验室中,电容器辐射比常用的测量方法为表面振速法。本文首先在半消声室内建立了电容器噪声辐射比的
2、测试系统,在正弦扫频激励下,分别用表面振速法、振声频响函数法(FRF)测量电容器噪声辐射指数曲线。并在几个单频正弦激励下,根据测量的电容器不同表面噪声辐射指数曲线,计算出电容器表面噪声值,再将计算噪声值与实测噪声值进行对比,验证了振声频响函数法的准确性。关键词:电力电容器;辐射比;噪声;表面振速法;振声频响函数法中图分类号:TM531.4;TB535文献标识码:A文章编号:1674.1757(2012)04-0039-07StutyonExperimentalMeasurementMethodsofNoiseRadiationRatioofPowerCapacito
3、rCHENGJin-ying,LIZhi—yuan,CUIXin(Sound&VibrationResearchInsitute,HefeiUniversityofTechnology,Hefei230009,China)Abstract:PowercapacitorisoneofthenoiseathighvoltageDCconverterstation,which,ifnotbe—ingcontrolledeffectively,willcausedangertothesocialenvironment.Therefore,theexperimentalmea
4、surementofcapacitorradiationratiocanbestudiedbydirectlycalculatingthecapacitornoisethroughtheradiationratio,toprovideevidenceofnoiseestimationofthecapacitor.Inthelaborato—ry,thenormalmeasurementmethodofradiationratioissurfacevibrationvelocitymethod.Inthispaper,thesystemtestingnoiseradi
5、ationratioofthecapacitorisestablishedfirstlyatasemi-anecho-icroom.Then,theexponentcurveofnoiseradiationofcapacitoris,underexcitationofsinescanfrequency,measuredbysurfacevibrationvelocityandfrequencyresponsefunction(FRF)respec—tively.And,undersineexcitationofseveralsinglefrequencies,the
6、surfacenoisevalueofcapacitoriscalculatedaccordingtothenoiseradiationexponentcurveofdifferentsurfacesinthemeasuredca—pacitor,thecalculatednoisevalueandactuallymeasuedonearecomparedandthecorrectnessofFRFmethodsiSverified.Keywords:powercapacitor;radiationratio;noise;surfacevibrationmethod
7、;frequencyresponsefunction(FRF)method收稿日期:2012.3-27基金项目:十一五科技计划支撑项目“特高压输变电系统开发与示范”资助(2006BAA02A18)。SupposedbykeyProjectsintheNationalScience&TechnologyPillarProgramDuringtheEleventhFive—yearPlanPeriod-“DevelopmentandDemonstrationoftheUHVPowerTransmissionSystem”(2006BAA02A18).·39·2012
此文档下载收益归作者所有