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,,(510640):,。:;;:TM401+.1:B:1001-8425(2009)03-0034-04TechnologytoReduceTransformerNoiseDENGJun,YANGXiang蛳yu,LONGWei(SouthChinaUniversityofTechnology,Guangzhou510640,China)Abstract:Somemethodstoreducetransformernoisearediscussed.Theirprinciples,ad-vantagesanddisadvantagesarepresented.Keywords:Transformer;Noise;Analysis1,。。,。、。,。1980Angevine。(1m),,。60Hz,120Hz240Hz、360Hz、20dB、15dB、13dB。、[1]。Kumamoto,,,,。。22.1。(2)(100Hz、200Hz、300Hz、400Hz),,。1[2]。2.22。,,。,,,,:10009008007006005004003002001000.00050.0010.00150.0020.00250.0030.003500U/Vf/Hz1Fig.1Frequencyspectrumoftransformernoise46320093TRANSFORMERVol.46MarchNo.32009、、3LIL=10lgYX2=10lgcoskl+1aAS(sinklkl!)2+sin2k#$l(1)LIL———,dBX———,m2Y———,m2k———,1/m,k=ω/CL———,ma———,mS———,N/m4,S=ρC2/alω———,Hz,ω=2πfC———,m/sρ———,kg/m3A———、、(1),3。。、。,。,,。,。4,。[3]。33.1,、180°“”[4]。,,,,。3.2[5]。。,,。,。,,,。,1[6]。4YX2Fig.2Modelofsoundscreen/dB/Hz3Fig.3Noiseattenuationdiagramofsoundinsulationwall/dB/dB120240360600480720/Hz4Fig.4Designrangeofnoisefrequencyofsoundscreen3546。,:①。②,。120Hz:Ji=12ρ0CXi2(2πfi)2×10-7,W/cm2(2)ρ0———,kg/m3C———,m/sfi———,HzXi———,m,。,。,。,。5。,。。6。,,FFT,。。40,,15。:P(s)=g115i=1仪s+zis+pi(3),:xp=APxp+BPu+dy=Cpxpp(4)xp———15u———1y———d———,,,[7]。5,,,。,,,。,。,。,,。,,。:[1].[M].:,2003.[2],,,.[J].,2004,40(4):3.FFT6Fig.6Testdeviceofsystemidentification5Fig.5SystemstructureofvibrationsuppressionmethodCr=0GPdu++CyZd0(39)363、。(3),、、。,,。、,、、、,,。,60%,80%,80%,,。,,,,,,,。、,,。,,,。,,,10%。6,,,,。,,。(a)(b)3Fig.3Picture4Fig.4Applicationtointegralsubstation:2008-10-24:(1974-),,,,。!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!![3]EllingsonEF.Transformernoiseabatementusingtunedsoundenclosurepanels[D].TransmissionandDistributionConferenceandExposition,IEEE/PES,1979:184-191.[4]TeohC,SohK,ZhouR,etal.Activenoisecontroloftransformernoise[J].IEEEEnergyManag.&PowerDe-liv.,1998,2(3~5):747-753.[5]BlancC,ChritinV,VanLanckerE,etal.A-cousticmappingforactivetransformerquietingapplica-tionsbasedonamodularDSPplatform[D]IEEEIn-dustrialElectronicsSociety,2005.IECON2005.32ndAnnualConferenceofIEEE2005,11:5.[6]KeerthipalaWWL,ZhouRJ,TanEL.Electron-iccircuitsforactivecontrolofacousticnoisegeneratedbyhighvoltagetransformers[D].IEEEPowerElectronicDrivesandEnergySystemsforIndustrialGrowth.1998,1:243-248.[7]ShigeyasuK,KazunobuK.Vibrationsuppressioncon-troloftransformercoreusingH∞controlindustrialelectronics,control,andinstrumentation[D].Proceedingsofthe1995IEEEIECON21stInternationalConferenceonVolume2,6-10,Nov.1995,2:902-907.:2007-11-11:(1983-),,,,。(36)39
本文标题:变压器的降噪技术
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