计及分布式发电的配电系统随机潮流计算

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1、ABSTRACTAsthedevelopmentofthepowertechnology,thedailyincrc船ingloaddemandandtheexpansionofthegenerationsize,theproblemsgraduallyemerge，suchasthehardtrackingofpowersystemtotheload’schange．10wsystemreliability,largelinelossof缸'ansmissionsystemanddistributionsystem，seriousenvironmentpollution．Thetradit

2、ionalcentralizedmodeofpowersupplymainlyusinghydraulicandtharmalpowerplantsismoreandmoredifficulttobeaccepted．Basedonthis．onehndOfdistributedgenerationtechnology砸msmallsizeandlowcostwhichcansupplyclearandreliablepowerwasputforwardandstudied．Theyrepresentthenewestworldwidedevelopmentoftheenergyindust

3、ry．Distributedgenerationhastheadvantagesoflowcost,lowlost,hi曲reliability,hi班efficiencyanddiversityofenergyreSOUrCes．Soapplyingdis蛐utedgenerationtocurrentpowersystemisthedevdopmenttrend．Buttheinterconnectionofdistributedgenerationt0powergridcanmakelargeinfluenceandthecontrolandmanagementofdistributi

4、onsystemcanbemorecomplex．Basedohthis，thispaperanalyzestheinfluencesofdistributedgenerationtothedistributionsystemoperationandplanningandintroducesthesolvingstrategy．Anditalso硼o@ectsthefutureofthedistributedgeneration’sdevelopment．Atpresent,distributedgenerationbasedonphotovoltaicsystems(PVS)andwind

5、energysystem(WES)aredevelopingquickly．Atthe$al-fletime，theprobabilistieoutputpowerreliedonnaturalconditionsCallalSOcauseovervoltageandundervoltageproblems．Basedontheseproblems，thispaperconductsstudyontheimpactsofWESandPVStothedistributionsystemvoltagequality．Itputforwardaprobabilistiepowerflowmetho

6、dtoevaluatetheiIlfluenceofdis砸bmedgeneration．TheprobabilistiemodelofWESisestablishedwhiehconsiderstherelationshipbetweenoutputpowerofWESandwindvelocity．Inthesarlleway,theprobabilistiemodelofPVSisestablishedwhichconsiderstherelationshipbetweenoutputpowerofPVSandsolarradian∞．ApplyingthismodelintotheI

7、EEE34distributionsystemwithdistributedgenerationandconductprobabilistiepowerfow,wecangettheprobabilistiedensityfunctionofnodevoltageandtheexpectedhourswhichexceedvoltagelimitsinawholeyear．Theprobabilistiepo