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1、AbstractAbstractCausethewayoftransmissionanddistributionintraditionalpowergridexistmanydeficiencies，italsopromotesthedevelopmentofdistributedgenerationtechnologies.Butnowexistingoperatingmodecannotmeettheapplicationrequirementsanymore.Therefore,onthebasisofdistributedgeneratio
2、ntechnologies,meltthemicro-powerandloadasa"Overall".The"Overall"isjustamicro-gridwhichcanrunwithdistributiongridandcanalsoberunsingle.Nomatterwhatstatethemicro-gridis,thatitneedtoensurethestabilityofitspowerquality.Andforthispurposecanbeadjustedtoachievemicro-power.Mostmicro-p
3、oweraccessemicrogridbyinverter,therefore,sothecontrolobjectcouldtransformoninverter.v/fcontrolisaconstantvoltageandconstantfrequencycontrol,nomatterhowchangesinthepoweroutputofthemicro-power,theoutputvoltageamplitudeandfrequencykeepintheacceptablerange,havegreathelpforthestabl
4、eofpowerquality,suitableformicro-gridislandingoperation.v/fcontrolcontainthedroopcharacteristics,justliketheconventionalgenerator,forthewirelessparallelcontrolbetweenthemicro-power.ArticleusedP-f、Q-Udroopcharacteristicsfordesigncontrolsystems.ThewholecontrolsystemcontainPQmeas
5、urementandcalculation、P-f、Q-Udroopcontrol、voltageandcurrentdoubleclosed-loopcontrol.Inthedoubleclosed-loopdesign,articlesselectthecurrentoffiltercapacitor,asthecontrolvariablesofcurrentloop,socurrentloopcouldsuppressionthedisturbanceofloadcurrentintime.Thev/fcontrolsystemdesig
6、nedinarticles,couldreasonableallocationpowerinmicrogridforeachmicro-power,thusavoidingsomemicro-poweroverload.PQcontrolistheconstantpowercontrol,suitableforrunningwithgrid.ThePQcontrolsystemdesignedinarticles,controllingtheinverteroutputactivecurrentandreactivecurrent,aimtocon
7、troltheoutputpower.Thecontrolsystemaccordingtothereferencevaluecouldoutputconstantactivepowerandreactivepower,whensystempowerchanges.basedonthemathematicalmodelinthetwe-phaserotatingcoordinatesystemandcombinedsomedecouplingmeans,designforthev/fcontrolsystemandthePQcontrolsyste
8、m.Inthecontrolsystemdesigntypicalusesofthedesignprocesswillbe
