高级智能故障信息处理系统中关键技术的开发研究——主站故障诊断

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1、THERESEARCHONKEYTECHNOLOGYOFSENIORINTELLIGENTFAULTDIAGNOSISSYSTEMINDISPATCHINGCENTERABSTRACTWhencomplicatedfaultsinalargeareaarehappenedinapowersystem,itisdifficultformanagementandrunningpersonneltojudgethemaccuratelyaccordingtotheshiftinformationofrelaysandswitchescontactfromSCADAsystem

2、only.Theanaloginformationthatcomesfromfaultrecordequipmentsbecomestheimportantbasisoffaultdiagnosisandsystemrecoverymoreandmore.Inordertoimprovefaultrecognitioncapabilityandcomputationalspeedofthefaultdiagnosissystem,thispaperpresentsanewwaveletneuralnetworkmodeconstructedfromliftingwave

3、letandRBPNNneuralnetwork.Thecoefficientsoffaultcurrentsinthelowfrequencybandbetween0and375Hzthatdecomposedbybior3.1liftingwaveletareputintotheneuralnetwork.ThroughATPsimulation,theresultindicatesthatthementionedmodelinthispaperhasveryhighrecognitionrateandconvergencespeed.Itislikelytoapp

4、lythismodelinafaultdiagnosissystemofapowernetwork.Manylecturesathomeandaboardhaddonealotofresearchworkintwoendlocationandmulti-terminaltransmissionlineslocation.Aseriesofsolutionhavebeenproposed.Atpresent,therearesomeshortcomingsintheselectures,suchasfaultlegmaybechosenincorrectly,notsui

5、tableforrecorddata,suitableconnectiontypeisrestrictedandsoon.Thispaperpresentstwoalgorithmsofmulti-terminallocation.Onealgorithmonlyusesfaultvoltageinlocationbasedonlumpedparameter.Thelocationresultisn’tinfluencedbyCTsaturationafterfault.Theotheralgorithmusesfundamentalcomponentofvoltage

6、andcurrenttoformfractiontypeiterativeformulabasedondistributionparameter.Thisalgorithmhasgoodrobustness.Alotofsimulationandrealfaultrecorddataofapowernetworkvalidatesthatthetwoalgorithmsareeffective.KEYWORDS：waveletnetwork;faultrecorddata;faultlineselection；faulttyperecognition;multi-ter

7、minallocation；faultdiagnosis上海交通大学硕士学位论文第一章绪论1.1课题背景和意义电网安全事关国家安全、社会稳定和生产生活的正常进行。近期美、加以及欧洲先后发生的停电事件，造成了非常恶劣的影响，对中国的电网安全再次敲响了警钟。经初步分析表明，美、加大停电的重要原因之一是对电网的故障分析不及时、不准确以及事故应急处理机制不健全。现代化大电网的运行越来越依赖于对各种信息的有效分析和处理。在电力系统发生故障，尤其是大面积复杂故障时，仅仅依靠来自SCADA系统的保护、开关接点的变位信[1−2]息，调度运行人员难以做出准