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1、AbstractAbstractCausethewayoftransmissionanddistributionintraditionalpowergridexistmanydeficiencies，italsopromotesthedevelopmentofdistributedgenerationtechnologies.Butnowexistingoperatingmodecannotmeettheapplicationrequirementsanymore.Therefore,onthebasisofdistributedgenerationtechnologies,
2、meltthemicro-powerandloadasa"Overall".The"Overall"isjustamicro-gridwhichcanrunwithdistributiongridandcanalsoberunsingle.Nomatterwhatstatethemicro-gridis,thatitneedtoensurethestabilityofitspowerquality.Andforthispurposecanbeadjustedtoachievemicro-power.Mostmicro-poweraccessemicrogridbyinvert
3、er,therefore,sothecontrolobjectcouldtransformoninverter.v/fcontrolisaconstantvoltageandconstantfrequencycontrol,nomatterhowchangesinthepoweroutputofthemicro-power,theoutputvoltageamplitudeandfrequencykeepintheacceptablerange,havegreathelpforthestableofpowerquality,suitableformicro-gridislan
4、dingoperation.v/fcontrolcontainthedroopcharacteristics,justliketheconventionalgenerator,forthewirelessparallelcontrolbetweenthemicro-power.ArticleusedP-f、Q-Udroopcharacteristicsfordesigncontrolsystems.ThewholecontrolsystemcontainPQmeasurementandcalculation、P-f、Q-Udroopcontrol、voltageandcurr
5、entdoubleclosed-loopcontrol.Inthedoubleclosed-loopdesign,articlesselectthecurrentoffiltercapacitor,asthecontrolvariablesofcurrentloop,socurrentloopcouldsuppressionthedisturbanceofloadcurrentintime.Thev/fcontrolsystemdesignedinarticles,couldreasonableallocationpowerinmicrogridforeachmicro-po
6、wer,thusavoidingsomemicro-poweroverload.PQcontrolistheconstantpowercontrol,suitableforrunningwithgrid.ThePQcontrolsystemdesignedinarticles,controllingtheinverteroutputactivecurrentandreactivecurrent,aimtocontroltheoutputpower.Thecontrolsystemaccordingtothereferencevaluecouldoutputconstantac
7、tivepowerandreactivepower,whensystempowerchanges.basedonthemathematicalmodelinthetwe-phaserotatingcoordinatesystemandcombinedsomedecouplingmeans,designforthev/fcontrolsystemandthePQcontrolsystem.Inthecontrolsystemdesigntypicalusesofthedesignprocesswillbe
