第×卷第×期电测与仪表Vol.×No.××年第×期ElectricalMeasurementInstrumentation×.×机电振荡模式属性和机组参与特性的量化剖析研究*荣娜,李泽滔,韩松(贵州大学电气工程学院,贵阳550025)摘要:机电振荡模式属性和机组参与特性的量化剖析是大规模互联电力系统安全稳定运行的态势感知理论的基础性问题。为此本文借助相对局域性量化指标Lidx,研究了不同边界条件,涉及发电机类型、区间潮流以及旋转备用,对于机电模式的局域性和机组参与特性影响。利用PSS/EV33仿真工具,经典的2区4机系统及其变化案例的仿真结果说明,首先,Lidx指标可量化机电振荡模式属性,有潜力用于跟踪区域模式或局部模式的演化。其次,形如负荷和发电的波动以及双馈式感应发电机(DFIG)的引入产生的系统边界条件变化会使得发电机参与度发生变化,进而可能使得机电模式属性从局部模式向区域模式转变,反之亦然。最后,DFIG接入区域电网后,预测区间模式中最大参与度的发电机是可能的。关键词:机电振荡;模式属性量化;相对局域性指标;参与特性;模式演化:TM711文献标识码:A:1001-1390(2016)00-0000-00AstudyResearchofonthequantifiedquantificationanalysistechniqueaboutonmodalpropertyandparticipationfeatureinvolvingelectromechanicaloscillationmodeRongNa,,LiZetao,,HanSong(DepartmentofElectricalEngineering,GuizhouUniversity,Guiyang550025,China)Abstract:Fordevelopingthesituationalawarenesstechnologyforthelargescalepowersystems,Ititisimportanttostudythequantifiedquantificationanalysistechniqueaboutthepropertyofelectromechanicaloscillationmodeandtheparticipationfeatureofgenerator,fordevelopingthesituationalawarenesstechnologyforthelargescalepowersystems.Therefore,thispaperpresentsanimprovedquantitativeindicatorfortherelativelocalnessindexofelectromechanicaloscillationmode,denotedbyLidx.Thentheimpactsofdifferentboundaryconditionssuchasgeneratortype,powerflowoftieline,andspinningreservecapacityonthemodallocalnessofandtheparticipationfeatureofgeneratorelectromechanicaloscillationmodehavebeenstudied.ThecasestudieshavebeencarriedoutonaKundur4-machineand2-areasystemanditsvariants,utilizedbyPSS/EV33,andtheresultsverifytheeffectivenessofLidxwhichcouldbehelpfultotracktheevolutionofinter-areamodeorlocalmode.Moreover,itindicatesthattheparticipationfeatureofgeneratorwouldbechangedandcon第×卷第×期电测与仪表Vol.×No.××年第×期ElectricalMeasurementInstrumentation×.×sequentlymodalpropertywouldbetransformedfromlocalmodetointer-areamodeorviceversaiftheboundaryconditionissignificantlyvariedforinstancethefluctuationsfromloadconsumingorpowergeneratingandtheintegrationofdoubly-fedinductiongenerator(DFIG),andviceversa.Furthermore,itispossibletopredictthegeneratorwithmaximumparticipationforinter-areamodewhentheDFIGisintegratedintoaregionalpowergrid.Keywords:Electromechanicalelectromechanicaloscillation,quantificationofmodalproperty,relativelocalnessindex,participationfeature,,modalevolutionmodalevolution*基金项目:国家自然科学基金资助项目(51567006;61540067);贵州省科学技术基金项目(20132109)0引言随着跨区域大容量交直流互联的发展,以及输配电网中风能等间歇性、随机性新能源渗透率的增加,在提高电力系统运行经济性和优化一次能源比例的同时,也使整个互联系统的动态特性变得更为复杂[1-2]。发展广域测量系统WAMS(WideAreaMeasurementSystem)及态势感知技术[3]的重要目标之一就是提供这些复杂互联系统机电振荡行为的关键信息,如模式演化等[4-5]。而支撑上述目标实现的基础理论中,机电振荡模式属性和发电机参与特性的量化剖析问题还有待深入研究和探讨。传统上,电力系统的两类机电振荡模式属性分别如下:一为局部模式振荡,几...