光伏发电并网系统双向电能表的设计_蒙宇

2014285Vol．28No．52014107JOUＲNALOFTESTANDMEASUＲEMENTTECHNOLOGYSumNo．1071671-7449201405-0418-07＊030006、．CirrusLogicCS5463STC12C5A60S2．CS5463STC12C5A60S2TM615Adoi10．3969/j．issn．1671-7449．2014．05．010DesignofBidirectionalkWhMeterofGrid-connectedPVPowerSystemMENGYuDONGYou＇erCHENBaomingTANGJin＇ePhysicsTeachingCenterShanxiUniversityTaiyuan030006ChinaAbstractWiththeshortageoffossilenergysolarphotovoltaicpowergenerationhasbecometheworld＇satten-tionandfavorasazero-emissionszeropollutionrenewableenergy．Tosatisfytheneedsofbi-directionalpowermeasureofthegrid-connectedPVsystemabi-directionalkWhmeterbasedonCS5463powerandSTC12C5A60S2microprocessorispresentedinthispaper．Thebi-directionalkWhmeteraccuratelymeasuresandcalculatesthebi-directionalelectricalpowerbetweengridandthegrid-connectedphotovoltaicsystem．Throughtheoreticalanalysisandcalculationoftheapparentpoweractivepowerreactivepowerandotherpa-rametersthepurposeofreal-timeenergydirectiondiscriminationbi-directionalenergyrecordingisachievedverywell．KeywordsbidirectionalkWhmetergrid-connectedPVpowersystemCS5463STC12C5A60S212．．3《》．．、、、．*2014-06-16J12100361988-．118801．．．188911Fig．1PrincipleofelectronicKWHmeter90°．．4．2060．1、4．、．．2．211．．．2Fig．2Grid-connectedPVpowertestingsystem2．．．．．2．1ut=Umcosωt+θUmTω=2π/Tθ．Z914107PZt=ut2Z．1WTWT=∫T0PZtdt=∫T0U2mcos2ωt+θZdt=U2mT2Z．2UTU=∫T0u2dt槡T=Um槡2．3it=Imcosωt+ψψIm．I=∫T0i2dt槡T=Im槡2．4φ=θ－ψpt=ut·it=12UmImcosθ－ψ+cos2ωt+θ+ψ．51WP=∫T0ptdt=UIcosθ－ψT．6WPTPUISFPP=WPT=∫T0utitdtTS=UI7FP=cosφ=PS．、3．．FP5．3Fig．3CalculationflowofbidirectionalKWHmeter2．220．ADC、、、．ADC02420145NN．ADCNuNU．I．NuiNpNP．IUS．PSFP．P．φ－π4π()4．3CirrusLogicCS5463STC12C5A60S2．4、CS5463．4Fig．4DesignofbidirectionalKWHmeter3．1CS5463500mV220V50Hz311V．．TV1013、．5TV10132mA/2mA150kΩ100ΩCS5463．UCS6463Uin=U150kΩ·2mA2mA·100Ω=23000U．86TA060．TA06020A/20mA15ΩCS5463．ICS5463Iin=I·20mA20A·15Ω=3200I．9CS5463、250mV124107375V16．7A0V～263V0A～11．78A．67．5Fig．5Acquisitioncircuitofvoltagesignal6Fig．6Acquisiuioncircuitofcurrentsignal3．2CS5463EEPＲOMSTC12C5A60S2．CS54637．7CS5463Fig．7DesignofCS5463STC122C5A60S2、、8051．MAX810EEPＲOM12ADPWM32I/O．CS54631000∶10．1%IECANSIJIS．22420145．CS5463VEＲFOUT2．5V．7UinIinCS5463、、、、、、．CS5463．E1E2．4．096MHzPulseＲate2kHz2．5V10FaveP=Uin×Ugain×Iin×Igain×FP×PluseＲateU2refin10FP．FaveP=23000U×10×3200I×10×FP×2kHz2．5V2=P×2Hz2．5V2．111PFaveP=2．5V22Hz11kWh3700000J115200018．3．3CS5463STC12C5A60S2EEP-ＲOMCS5463．．EEPＲOM．CS5463910．89．8Fig．8Flowchartofprogram9Fig．9FigueofbidirectionalKWHmeter3241074．．、．、GPＲS．1．J．20122912188-192．LiFenChenZhenghongHeMingqiongetal．ＲeviewofstatusandprospectofsolarphotovoltaicpowergenerationJ．WaterＲesourcesandPower20122912188-192．inChinese2MaycockP．PVreviewWorldSolarPVmarketcontinuesexplosivegrowthJ．Ｒefocus20056518-22．3．D．2013．4．J．2009145-47．FanLongzhang．Thedevelopmentandthetrendofthewattmeters’technologyJ．ShanghaiMeasurementandTesting2009145-47．inChinese5M．2010．6MilkovicM．Two-wayelectronickWhmeterP．U．S．Patent40587681977-11-15．7ArifAAl-HussainMAl-MutairiNetal．ExperimentalstudyanddesignofsmartenergymeterforthesmartgridC//ＲenewableandSustainableEnergyConferenceIＲSEC2013International．IEEE2013515-520．8LITJINX．PrincipleandapplicationofpowerenergymeasurementICCS5463J．InternationalElectronicElements20067012．9．CM．2005．10．51CM．2009．42420145