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1、分类号TM910密级微电网混合储能系统荷电状态估计及功率协调控制方法研究研究生姓名：马定寰指导教师姓名、职称：朱晓青教授、李圣清教授学科专业：电气工程研究方向：现代电力电子技术及系统湖南工业大学二〇一八年四月十五日hybridenergystoragesystemHESSHESSHESSDC-DCBUCKBOOSTHESSBPHESSBPBPHESSHESSHESSIABSTRACTMicro-gridisoneofthemosteffectivewaystomakeuseofwindandlightasanewene
2、rgygenerationtechnology,butinthedistributedgenerationsystem,theintermittentandrandomcharacteristicsoftheoutputpowerwillalsoaffectthestableoperationofthemicro-grid.Thispaperfocusesonthekeyproblemofreducingtheoutputpowerfluctuationofthedistributedpowersupply,theba
3、tteryandsuper-capacitorarecomposedofhybridenergystoragesystem(HESS),andthechargestateestimationoftheenergystorageelementandtheinternalpowercoordinationallocationoftheHESSsystemareemphaticallystudied.Themaincontentsofthispaperareasfollows:First,accordingtothework
4、ingprincipleofwindpowergeneratorandphotovoltaicarray,thestochasticandintermittentcharacteristicsofdistributedgenerationpoweroutputinmicro-gridareexpounded.Establishthewindspeedmodelwhichcanreflecttherandomandintermittentcharacteristicsofwindenergy,andtheworkingc
5、haracteristicsofthewindpowergeneratoraredescribed,theoutputpowercharacteristicsofthephotovoltaicarrayareanalyzedwiththeequivalentcircuitofthephotovoltaiccell.Atthesametime,combiningthedistributiondensityofwindandlightenergy,itisshownthattheyhaveacertainnaturalco
6、mplementaritywithinalongperiodoftime,butthiscomplementarityisnotobviousinashorttime.Then,thestructureandprincipleofthemicro-gridHESSsystemaredescribed.Theequivalentcircuitmodelandchargeordischargecharacteristicsofthebatteryandsuper-capacitorareanalyzed.Theworkin
7、gprincipleofthebidirectionalDC-DCpowerconverterintwomodesofBUCKandBOOSTisintroduced,andtheadvantagesanddisadvantagesofthethreeparallelwaysofthebatteryandthesuper-capacitorareexpounded.Byestablishingthemathematicalmodelofthemicro-gridHESSsystem,clearthepowerconst
8、raintconditionsofanenergyelementinchargeanddischarge.Again,theBPneuralnetworkisusedtoaccuratelyestimatetheSOCoftheHESSsysteminthemicro-grid,andtrainthenetworkmodelwit
