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1、第41卷第6期電力系統(tǒng)保護(hù)與控制V_o1.41NO.62013年3月16日PowerSystemProtectionandControlMar.16.2013基于廣義注入電流節(jié)點(diǎn)模型的配電網(wǎng)潮流計(jì)算陳樹恒,黨曉強(qiáng),李興源(1.電子科技大學(xué)能源科學(xué)與_T-程學(xué)院,四川成都611731;2.四川大學(xué)水利水電學(xué)院,四川成都610065;3.四川大學(xué)電氣信息學(xué)院,四川成都610065)摘要:通過引入廣義注入電流節(jié)點(diǎn)模型,提出了一種改進(jìn)的可兼顧分布式電源場景和弱環(huán)網(wǎng)場景的配電網(wǎng)潮流算法。首先,基于現(xiàn)有理論將各類分布式電源的注入功率和弱環(huán)網(wǎng)斷點(diǎn)所在支路的交換功率變換為廣義注入電流,從而實(shí)現(xiàn)將
2、含分布式電源和弱環(huán)網(wǎng)的復(fù)雜配電網(wǎng)轉(zhuǎn)換為常規(guī)的輻射狀配電網(wǎng);然后,分析了各類注入電流在每次迭代計(jì)算時(shí)的求解方法;進(jìn)一步,設(shè)計(jì)了二維輻射狀配電網(wǎng)模型的動態(tài)存儲結(jié)構(gòu)及改進(jìn)的前推回代法;最后,利用Vc++編程語言和MSSQLSERVER數(shù)據(jù)庫研制了相應(yīng)的配電網(wǎng)潮流計(jì)算系統(tǒng)并以此系統(tǒng)進(jìn)行了算例研究。算例結(jié)果表明:相對于現(xiàn)有算法,所改進(jìn)的配電網(wǎng)潮流算法在計(jì)算速度上有一定的提高,同時(shí)也更容易實(shí)現(xiàn)。關(guān)鍵詞:分布式電源;弱環(huán)網(wǎng);配電SCADA;廣義注入電流;動態(tài)存儲結(jié)構(gòu)Powerflowmethodfordistributionnetworkbasedongeneralizedinjcotingc
3、urrentnodemodelCHENShu.heng,DANGXiaoqiang,LIXing.yuan(1.SchoolofEnergyScienceandEngineering,UniversityofElectronicScienceandTechnologyofChina,Chengdu611731,China;2.SchoolofWaterConservancyandHydroelectricPower,SichuanUniversity,Chengdu610065,China;3.SchoolofElectricalEngineeringandInformation
4、,SichuanUniversity,Chengdu610065,China)Abstract:Bydefininggeneralizedinjectingcurrentnodemodel,animprovedpowerflowmethodispresented,whichcouldbesuppliedintodistributionnetworkwithweaklymeshednetworkanddistributiongenerationatthesametime.Firstly,basedoncurrenttheory,boththeinjectingpowerofDGan
5、dthebreakpointbranchexchangingpowerarerepresentedasgeneralizedinjectingcurrent,SOthecomplexdistributionnetworkwithDGofPVandweaklymeshednetworkarechangedintotraditionalradialdistributionnetwork;then,themethodsforcalculatingdiferentgeneralizedinjectingcurrentattheendofeachiterativestepareanalyz
6、ed;further,thetwodimensiondynamicstoragestructureofradialdistributionnetworkmodeliSdesignedandtheimprovedforward/backwardsweepmethodispresented;lastly,thiscorrespondingpowerflowcalculationsystemisdevelopedbasedonVC++programlanguageandMSSQLSERVERdatabasesystem.a(chǎn)ndwiththissoftwaresystemtheexamp
7、leresearchisdone.ThecalculatingresulthasprovedthatthecalculatingspeediSacceleratedandthemethodiSmoreeasilytoberealized.Keywords-distributedgeneration;weaklymeshednetwork;distributionSCADA;generalizedinjectingcurrent;dynamicstoragestructure中圖分