含多種分布式電源的弱環(huán)配電網(wǎng)三相潮流計算

1、合肥工業(yè)大學(xué)碩士學(xué)位論文含多種分布式電源的弱環(huán)配電網(wǎng)三相潮流計算姓名：郭學(xué)鳳申請學(xué)位級別：碩士專業(yè)：電力系統(tǒng)及其自動化指導(dǎo)教師：丁明20090301ThreephasePowerFlowfortheWeaklyMeshedDistributionNetworkWiththeDistributedGenerationAbstractThestatusofenergyandresourceinchinaisverygrimThedevelo

2、pmentmodelofeconomymustbedecisivelytransferredfromexcessiveconsumptionofresourceandenergyandpollutionoftheenvironmenttoaverythriftymodel，whichisinharmonywiththenatureDistributedgenerationisabrand—newandpromisingtechnolog

3、ytogenerateelectricityandutilizepowercomprehensivelyDistributedgenerationincludeswindpowersolarpowerbatteryfuelcellandmicroturbines，etcThedevelopmentofdistributedgenerationhasbroughtnewadvantagestotraditionalpowersystems

4、，ithasalsobroughtchallengesincludingnetworklosses，powerflowvoltage，powerqualityandrelayprotection，etcItisnecessarytostudypowerflowfordistributionnetworkwithdistributedgeneration，becausepowerflowismajortoolandbasicofanaly

5、zingtheinfluenceofdistributedgenerationtopowersystemTraditionalbalancedpowerflowalgorithmsarenotapplicabletothedistributionnetworkwithdistributedgenerationbecauseoftheunbalanceinpowersource，loadandline，SOitisnecessarytos

6、tudyunbalancedthreephasepowerflowofdistributionnetworkThedifferencebetweenthemodelsofdistributedgenerationsandtraditionalgenerationsiskeytothepowerflowcalculationofdistributionnetworkwithdistributedgenerationGenerallyspe

7、aking，traditionalgenerationsareviewedasPQbus，PVbusorbalancebusinthepowerflowcalculationButthemodelofdistributedgenerationdependsonitsoperationmodeandcontrolcharacteristicBasedontheanalysisofwindturbines，photovoltaicsyste

8、m，fuelcell，storagebatteryhighfrequencymicroturbinesandpowerfrequencycombinedheatandpower(CHP)，theirmodelsinpowerflowcalculationwerepresentedBasedontheback／forwardsweepalgorithminpowerflowcalculationwhichwaswidelyusedfort

9、heradialdistributionnetwork，anewthreephaseback／forwardsweeppowerflowcalculationfortheweaklymesheddistributionnetworkwiththedistributedgenerationwaspresentedTheexamplehasprovedtheefficiencyandfeasibilityofthealgorithmKeyw