改进连续潮流与分岔理论在静态电压稳定分析中的应用分析

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1、太原理1:大学硕士研究生学位Q文ADVANCEDCONTfr孔JATIONPOWERFLOWANDBIFURCATIONTlffiORYANDITSAPPLICATIONSONSTATICVOLTAGESTABILITYANALYSISABSTJ忆也CTJnrecentyears,someoftheworld'snationssuccessivelyhappenedvojtagecollapseaccident.Thecausesoftheaccidentaredifferent,butitundoubtedlyhascausedgrea

2、teconomiclossesandsocialdisorder.Voltagestabilitystudiesincreasinglyattractedpeoplemoreandmorewidelyattention.Mechanismandindexofthevoltagestability,andstrategyofpreventingvoltagecollapse,andcontrollingofnearbyvoltagecollapsepointsarethefocusofresearch.ThePVcurve,arelatio

3、ncurvebetweennodevoltageandregionalload,canbeinstructedtothelevelofregionalloadandtheextentofthevoltagecollapsebecauseofloadgrowth.ContinuationpowerflowcantracecompletePVcurve,ithasgreatlyapplicationsinpowersystemstaticstabilityanalysis.Howeverttherearetwoproblemswithit.T

4、hefirstishowtodeterminetheloadgrowthmodeandmakeitclosetoac阳alpowersystem;thesecondisthatcalculationprocessisverytime-consuming・ThispaperanalyzesanddiscusseseachlinkofcontinuationpowerflOwmethod,andpresentsanimprovedcontinuationpowerflOwbasedonfastdecoupledmethodandanimpro

5、vedcontinuationpowerflOwbasedonpiecewiseandlinearloadforecastingcurve.Meanwhi)ethispaperstudiestheimpacto[loadgrowthdirectiooaodloadcharacteristicsoovoJtagestabilityanalysis.Bifurcationtheorythinksthattherearetwotypesofbifurcationpoints・ThesaddleoodebifurcationcOiTespoodt

6、heoperatingpoiotoowhichJacobinmatrixhasazeroeigenvalue・Thelimit-inducedbifurcationcausessuddeodisappearanceofstableoperationpointduetoageneratorreachingitsQ-limit.Thispaperstudiestwobifurcationpoints,andanimprovedmethodforidentify!ngandcajcillationbifurcationpointsisprese

7、nted.Bifurcalioosei,madeupofbifurcationpoints,constitutesastableparameterspacewhichisvoltagestabilitydomain.Usingbifurcation由e。可，thispaperanalysestheeffectofOLTConthevoltagestab订ityconsideringloadcharacteristics・Thestaticanalysismethodbasedonpowerflowequation,makingcritic

8、alpointasthelimitofvoltagestability,hasmaturetechnologyandiseasytogivestableindicators.Thispaper