文档名：计及低电压穿越影响的感应电动机动态分群
摘要：随着新能源的大规模广泛并网,其对感应电动机动态等值建模的影响值得关注.该文提出了新能源电力系统中感应电动机动态分群新方法.分析了感应电动机与电网的交互作用,提出在现有基于感应电动机动态相似性分群的基础上,同时考虑机端电压动态相似性的分群可提高感应电动机动态等值精度.针对高比例新能源电力系统,研究发现感应电动机附近有新能源机组,且部分新能源机组在故障期间进入低电压穿越(LVRT)时,这些感应电动机动态特性具有显著差异.为此提出新能源电力系统中考虑感应电动机端口电压跌落深度的动态分群方法.算例分析表明,该文提出的兼顾感应电动机端口电压动态相似性以及端口电压跌落深度的分群方法具有较高的等值精度,且适应性强.
Abstract：Withthecontinuousintegrationoflarge-scaleofrenewableenergy,ahighshareofrenewableenergyisthemainfeatureofthemodernpowersystems.Sincetheconvertercontrollerofrenewablegenerationhasnonlinearmodulessuchascurrentlimitingandswitchingactions,thedynamiccharacteristicsoftheinductionmotorinthenearareawillbeinfluencedbythem.Thereforewhentherearealargenumberofrenewablegenerationinthenearareaoftheinductionmotor,thedynamicinteractionbetweentherenewableenergyandtheinductionmotorneedstobeconsidered.However,therearefewresearchontheimpactofrenewablegenerationoninductionmotorequivalentmodelingpresently.Toaddressthisissue,thispaperpresentsanewdynamicclusteringmethodofinductionmotorsinpowersystemswithahighshareofrenewableenergy.Firstly,theinteractionbetweeninductionmotorandpowergridisanalyzed,whichshowsthatthepowersysteminteractswiththeinductionmotorthroughitsterminalvoltage.Therefore,consideringterminalvoltagedisturbedtrajectoriescanimprovetheaccuracyofequivalentmodel.Thegroup-averagemethodisusedtoquantifythesimilarityofterminalvoltagefluctuation,andthesimilaritydistanceisappliedtogrouptheinductionmotors.Basedonthis,theclusteringmethodthatbothconsidersthesmalldisturbancedynamicsimilarityofinductionmotorandthedynamicsimilarityoftheterminalvoltageisproposed.Theultimateclusteringresultisobtainedbydividingtheintersectionoftheclusteringresultsobtainedbythetwomethodsintoanewgroupandtherestintoanewgroup.Forthepowersystemswithahighshareofnewenergy,itisfoundthatwhentherearerenewableenergyneartheinductionmotorsinthesamecluster,andsomeoftheserenewableenergyentersintothelowvoltageridethrough(LVRT)duringthefault,thedynamiccharacteristicsoftheinductionmotorsinthesamegroupwillhavesignificantdifferences.Therefore,adynamicclusteringmethodconsideringthevoltagedropdepthofinductionmotorisproposed.Therefore,thepaperproposestheclusteringmethodforinductionmotors,whichcombiningofthreefactorsof①thesmalldisturbancedynamicsimilarityofinductionmotor,②thedynamicsimilarityofterminalvoltageand③theclusteringresultsofterminalvoltagedropdepth.Basedontheclusteringresultsobtainedbythesethreemethods,theintersectionisdividedintoanewgroup,andtherestaredividedintoanewgrouprespectivelytoobtainthefinalclusteringresults.Basedontheobtainedclusteringresultsoftheinductionmotors,thepowernetworkissimplifiedaccordingtothesynchronousgeneratorcoherency-basedequivalentmethod.Theparametersofinductionmotorareaggregatedbyweightedaverageofeachindividualmotor.Finally,thedynamicequivalenceprocessofinductionmotorsiselaboratedbyintegratingthestepsofmotorclustering,parameteraggregationandpowernetworksimplification.Thefollowingconclusionscanbedrawnfromthe10-machine39nodeNewEnglandsimulationsystemandtherealpowergridofCentralTibet:(1)Comparedwithclassicalclusteringmethodbasedonthesmalldisturbancedynamicsimilarityofinductionmotor,furtherconsidersthedynamicsimilarityoftheterminalvoltagecanimprovethedynamicalequivalentaccuracyofinductionmotors.(2)Forthepowersystemwithhighproportionofphotovoltaicpower,itisfoundthatwhenthereisphotovoltaicpowerneartheinductionmotorinthesamegroup,andsomeofthesephotovoltaicpowerenterstheLVRTstate,theeffectsoftherenewableenergyonthedynamicsofinductionmotorsshouldbeincluded.Therefore,theclusteringmethodbyfurtherconsiderstheterminalvoltagedropdepthcanimprovetheequivalentaccuracyofinductionmotors.(3)Thefeasibilityandadaptabilityofthemodelingmethodproposedinthispaperareillustratedbyanalyzingtheerrorsoftheequivalentmodelsunderdifferentdisturbances.
作者：潘学萍 王卫康 陈海东 孙晓荣 郭金鹏Author：PanXueping WangWeikang ChenHaidong SunXiaorong GuoJinpeng
作者单位：河海大学能源与电气学院南京211100
刊名：电工技术学报
Journal：TransactionsofChinaElectrotechnicalSociety
年，卷(期)：2024, 39(7)
分类号：TM614
关键词：感应电动机 动态等值 新能源电力系统 动态相似性 低电压穿越
Keywords：Inductionmotor dynamicequivalence newenergypowersystem dynamicsimilarity lowvoltageridethrough(LVRT)
机标分类号：TM732TM614TP301.6
在线出版日期：2024年4月12日
基金项目：国家自然科学基金计及低电压穿越影响的感应电动机动态分群[
期刊论文] 电工技术学报--2024, 39(7)潘学萍 王卫康 陈海东 孙晓荣 郭金鹏随着新能源的大规模广泛并网,其对感应电动机动态等值建模的影响值得关注.该文提出了新能源电力系统中感应电动机动态分群新方法.分析了感应电动机与电网的交互作用,提出在现有基于感应电动机动态相似性分群的基础上,同...参考文献和引证文献
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