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1、大规模风电接入对电力系统暂态稳定风险的影响研究何廷一1,李胜男1,吴水军2,陈振3,郑子萱3(1.云南电力科学研究院,昆明650217;2.云南电力试验研究院有限公司,昆明650051;3.四川大学电气信息学院,成都610065)摘要:大规模风电接入电网可能影响电网运行状态,造成系统暂态稳定特性改变,量化大规模风电接入对电力系统暂态稳定风险的影响,是保证风电消纳和电网安全的重要课题。在研究系统暂态稳定性分析中的风电模型和电网故障严重程度的基础上,提出一种评估大规模风电接入的电力系统暂态稳定风险评估方法。该方法充分计及风电出力与系统故障状态的随机性,并基于效用理论
2、,以调度员对功角偏差的感知效用为度量指标,建立用非线性效用函数量化故障的严重程度,同时对系统暂态稳定风险指标的计算方法与流程进行了详细研究。将该方法应用于新英格兰39节点系统,对比研究了不同并网容量和并网点对暂态稳定风险的影响,仿真结果证明了所提方法的正确性和有效性。关键词:大规模风电;并网;故障严重程度;暂态稳定;效用理论;风险评估中图分类号:TM933文献标识码:B文章编号:1001-1390(2017)20-0000-00Studyontheinfluenceoflarge-scalewindpowerintegrationonpowersystemtra
3、nsientstabilityriskHeTingyi1,LiShengnan1,WuShuijun2,ChenZhen3,ZhengZixuan3(1.YunnanElectricPowerResearchInstitute,Kunming650217,China.2.YunnanElectricPowerTestInstituteCompany,Kunming6500051,China.3.SchoolofElectricalEngineeringandInformationTechnology,SichuanUniversity,Chengdu610065
4、,China)Abstract::Theintegrationoflarge-scalewindfarmswouldinfluencetheoperationstatusofpowersystem,whichresultsinthechangeoftransientstabilitycharacteristic,sothatitisveryimportanttoquantifytheimpactofwindfarmsforensuringthewindpowerusingandpowersystemsecurity.Thepowersystemtransient
5、stabilityriskassessmentmethodconsideringlarge-scalewindfarmsisproposedinthispaperbasedontheresearchofwindpowermodelandgridfailureseverity.Basedonthefullconsiderationoftherandomnessofwindfarmoutputsandsystemfailurestates,themethodemployemploystheutilitytheoryandtaketakestheperceivedut
6、ilityofoperatortorelativeangledeviationasthemeasureindex,thenandthen,thenonlinearutilityfunctionisconstructedtoquantifythefaultseverity.Furthermore,thecalculationmethodandflowchartofpowersystemtransientstabilityindexarealsoprovidedindetail.ThismethodisappliedtotheNewEngland39-bussyst
7、em,andtheeffectofdifferentintegrationcapacitycapacitiesanddifferentintegrationpointpointsonsystemtransientstabilityriskvalueisinvestigated.Thesimulationresultsshowtheeffectivenessandcorrectnessoftheproposedmethod.Keywords::large-scalewindfarm,gridinterconnection,failureseverity,trans
8、ientstabilit