《Power quality investigation of a solar PV transformer-less grid-connected system fed DVR》.pdf

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《Power quality investigation of a solar PV transformer-less grid-connected system fed DVR》.pdf

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Front．Energy2014，8(2)：240-253 D0I10．1007／s11708—014—0322一x AkhilGUPTA，SaurabhCHANANA，TilakTHAKUR PP00wWeerrCCluuaalliity Iinvestiggaattiiocn ofa solarPV traannssftoorrmmeerr-Ileessss grid-connectedsystem fedDVR ◎HigherEducationPressandSpringer—VerlagBerlinHeidelberg2014 Abstract Thispaperpresentsasinglestagetransformer- 1 Introduction lessgrid—connectedsolarphotovoltaic(PV)systemwithan activeandreactivepowercontro1．Intheabsenceofactive Custom powerdevices，like dynamicvoltage restorer inputpower,thegrid．tiedvoltagesourceconverterfvsc) (DVR)，aseriesactivepowerfilteristhelatestdevelop— isoperatedin areactivepowergeneration mode，which mentof interfacing devicesbetween the distribution powersthecon仃olcircuitry,andmaintainsaregulatedDC system andconsumer．Thesedevicesovercomevoltage voltagetotheVSC．A data—basedmaximum powerpoint and currentdisturbances，improve power quality by tracking(MPPT)controlschemewhichperfomr spower compensating thereactivepower，andreduceharmonics qualitycon仃olatamaximum powerbyreducingthetotal generatedorabsorbedbythelpad．Inthegrid—connected harmonicdistortionfTHD1ingridiniectedcurrentasper PV system consideringthepowerqualitY,studiesonthe IEEE一519／1547standardsisimplemented．Aproportiona1． linefrequencytransofriTlertypeareinprogress．butstudies integralfPI1controllerbased dynamicvoltagerestorer onthetransfomrer-lesstypearelimited．Oneofthemajor rDVR)controlschemeisimplementedwhichcon仃olsthe problemsinsuchsystemsistheincreaseintotalharmonic grid sideconverterduring single—phaseto ground fault． distortion(THD、ofthecurrentinjectedintothegridduring TheanalysisincludesthegridcurrentTHD alongwithhte 1ow solarradiationperiods．Standards．suchasIEEE一5l9／ correspondingvariationoftheactiveandreactivepower