搜索
:2003-11-18:(1974-),,,:1000-7709(2004)01-0083-03PWM雷元超 陈春根 陈国呈(,200072):介绍了可再生能源用逆变器的基本要求和滞环比较方式PWM跟踪控制用于可再生能源利用中的两种控制方式。从滞环控制方式的特点入手,详细分析了单相滞环比较控制方式的原理并计算得出了实际的器件开关频率计算式。仿真结果表明,假设合理,分析确切,控制方式简单,动态性能好、谐波小,适于并网及独立运行。:可再生能源;PWM跟踪;滞环比较控制;并网逆变器:TM910.1:A,,,,;,,DC-ACPWM,PWM[1]PWM,1,:a.,,b.,,,c.,,PWM,,,2PWMa.PWM1PWM,,u*u,u*-u,ûu*-uûH,Hu*,V1V4,UdLdR,R,u*-u-H,,-UdLdR,Rûu*-uûH,u*,,2Hu*1b.PWM2PWM22120043WaterResourcesandPowerVol.22No.1Mar.2004,Usin,i*i,i*-iûi*-iûH,Hi*,V1V4,Ud-UsinLd,Ldi*-i-H,-Ud-UsinLd,Ld,ûi*-iûH,,2H23,2HLdUd,[2]:¹tdº,»(PFC),,R3.11,u*=usin(Xt),u*0,14Ud=LddiLddt+RiLduR=iLdR=(u*0-H-Ud)eRt/Ld+Ud14,u*0+H=(u*0-H-Ud)eRton/Ld+UdTon=LdRlnUd-u*0+HUd-u*0-H14(23),-Ud=LddiLddt+RiLd,Toff=LdRlnUd+u*0+HUd+u*0-H,T=Ton+Toff=LdRln(Ud+H)2-(u*0)2(Ud-H)2-(u*0)2(1)f=RLdln(Ud-H)2-(u*0)2(Ud+H)2-(u*0)2,u*0,,T=LdR8u*udH(u*)(U2d+H2-(u*)2)2-(2UdH)2,;,,3.22,i*=Isin(Xt),i*0,Usin0,14Ud-Usin0=LddiLddtTon=2HdiLddt=2HLd(Ud-Usin0)23(14)-Ud-Usin0=LddiLddtToff=2HdiLddt=2HLd(Ud-Usin0)T=Ton+Toff=2HLd2UdU2d-U2sin0(2)f=U2d-U2sin02HLd2UdUsin,,f=-Usin(Usin)HLd2Ud,,;,412,:8420043Ud=150V,Ld=10mH4.1u*=usin(314t),100V,0.04s120V,2H=10,R=408,3(1)0.0333ms,3(b)4.2i*=Isin(314t),5A,0.04s8A,2H=0.2,u=100sin(314t)V,4(2)0.0266ms,4(b)45PWM,,,,PWM,,:[1],,.PWM[J].,2001(8):1-4[2],.[J].,1995(1):4-7AnalysisofHysteresisComparingPWMTrackingControlLEIYuan-chaoCHENChun-genCHENGuo-cheng(MechanicalEng.andAutomationInstitute,ShanghaiUniv.,Shanghai200072,China)Abstract:CharacteristicsofinverterinrenewableenergyutilityandhowtousehysteresiscomparisonPWMtrackingcontrolareintroducedinthispaper.Startingfromthecharacteristicsofhysreresiscomparisoncontrol,theprincipleofhysreresiscomparisoncontrolandtheformulaofactualswitchfrequencyaregotten.Thesimulationshowsthepresuppositionrationalityandthecorrectnessoftheanalysis,italsoshowsthesimplicityofthemethodandcircuitwithquickresponsibility,lowharmonicsandfitnessforbothisolatedandgrid-connectedapplication.Keywords:renewableenergy;PWMtracking;hysteresiscomparisoncontrol;grid-connectedinverter欢迎订阅 欢迎投稿85221:PWM