谢菲尔德变电站220千伏升级项目的可靠性建模与分析大学毕业论文外文文献翻译及原文

毕业设计（论文）外文文献翻译文献、资料中文题目：谢菲尔德变电站220千伏升级项目的可靠性建模与分析文献、资料英文题目：文献、资料来源：文献、资料发表（出版）日期：院（部）：专业：气工程及其自动化班级：姓名：学号：指导教师：翻译日期：2017.02.14ReliabilitymodellingandanalysisforSheffieldSubstation220kVupgradeprojectCarolineLeeTransend,NetworksPtyLtd,TasmaniaDrSudhirAgarwal,SanDiego,California,USAABSTRACTThispaperdescribestheapplicationofadefensibleprobabilisticprocessinreliabilityevaluationforSheffield220kVSubstationredevelopmentproject.SheffieldSubstationisahubof220kVtransmissionsystemintheNorthandNorth-WestregionsofTasmania.ItprovidesconnectiontoWestCoastandMerseyForthhydropowerstationsandfacilitatespowertransfersfromthesepowerstationstomajorindustrialcustomersinGeorgeTownareaandretailandindustrialloadsintheNorthandNorth-WestregionsofTasmania.Therefore,itisimportantthatintegrityofSheffieldSubstationisprotectedasmuchaspossibleandconsequencesofunplannedoutagesminimisedtopreventpossiblewidespreadsystemdisturbances.TogetherwithGeneralReliabilityfromSanDiego,California,TransendundertookthereliabilityevaluationoffourredevelopmentoptionsforSheffieldSubstationusingSUBREL,substationreliabilityandTRANSREL,transmissionsystemreliabilityprograms.1.INTRODUCTIONTransend,asaTransmissionServiceProviderandTransmissionNetworkOperatorinTasmaniaisresponsibleforprovidingreliableelectricitysupplyandprovidingcosteffectivedevelopmentsolutionsofthetransmissionnetwork.Transendhasidentifiedaneedforacomprehensiveandmoreobjectiveprocessinjustificationofdevelopmentprojectsfromitscapitalworksprogram.Theneedtocombinecustomerreliabilitytargetsandeconomicstoachievecosteffectivedevelopmentsolutionshasbeenlongrecognised.Ahierarchicalframeworkforoverallpowersystemreliabilityevaluationispresentedin[1].Differentdesign,planningandoperatingprinciplesandtechniqueshavebeendevelopedindifferentcountriesovermanydecadesinanattempttofindbalancebetweenreliabilitytargetsandeconomicconstraints[2].Followingthereliabilityconceptandprinciples,differentutilitiesapplieddifferentreliabilitycriteriatojustifyprojectsfromtheircapitalworksprogram.Reliabilitycriteriacanbeviewedasconditionsthatshouldbesatisfiedbyelectricitygeneration,transmissionanddistributionsystemsinordertoachieverequiredreliabilitytargets.Reliabilitycriteriausuallyfallintotwocategories:establishednumericaltargetlevelsofreliability(eglevelofexpectedenergynotsupplied)andperformancetestcriteria(egN-1,N-2incidentsthatthesystemhastowithstand).AnattempttocombinethesetwocategoriesintoonesetofreliabilitycriteriaiscurrentlyunderwayinTasmania[3].Theuseofreliabilitycriteriafromthefirstcategoryisthecoreofprobabilisticreliabilityevaluationapproach.Thesecondcategoryisadeterministicreliabilityevaluationapproach.Theusefulnessofdeterministiccriteriaandsecuritystandardsinjustificationofprojectsfromcapitalworksprogramischallengedin[4].Instead,anapproachinvolvingcustomersindecisionmakingandsimulatingarealisticsystemoperationandfailureiscommended.Thebasicstepssuggestedinproperreliabilityevaluationsarebasedoncompleteunderstandingoftheequipmentandsystembehaviourincluding:•Understandingthewaytheequipmentandsystemoperate;•Identifythesituationsinwhichequipmentcanfail;•Understandconsequencesofthefailures;•Incorporatetheseeventsintothereliabilitymodel;•Usetheavailableevaluationtechniquestocalculatereliabilityindicesandcosts.Withthisunderstandingofthesystembehaviourprobabilitytheoryisthenonlyseenasatooltotransformthisunderstandingintothelikelysystemfuturebehaviour.2.SELECTIONOFEVALUATIONTECHNIQUEANDSOFTWARETOOLSTherearetwomaincategoriesofevaluationtechniques[5]:analytical(stateenumeration)andMonteCarlosimulation.Theadvantagesanddisadvantagesofbothmethodsarediscussedin[1].AnalyticaltechniquewaschosenbyTransendbecauseofitsusefulnessincomparingdifferentdevelopmentoptionsfornetworkdevelopmentprojects.ThisapproachwaspresentedalsointheElectricitySupplyAssociationofAustraliaGuidelinesforReliabilityAssessmentPlanning[6].Consequently,decisionwasmadetoacquireSUBREL,andTRANSREL,substationreliabilityandtransmissionsystemreliabilityprogramsfromGeneralReliability,USA.2.1.SUBREL-SUBSTATIONRELIABILITYPROGRAMSUBRELisacomputerprogramwhichcalculatesreliabilityindicesforanelectricityutilitysubstationandgeneratingstationswitchyard[7].Themethodologyusedtoanalyseimpactofsubstationgeneratedoutagesonoverallsystemreliabilityperformanceshasbeendescribedin[8].Theprogrammodelsthefollowingoutageevents,includingallrequiredsubsequentautomaticandmanualswitchingoperations:1.Forcedoutageofanysubstationcomponent:•Breaker•Transformer•BusSection•Disconnector2.Forcedoutageofanincomingline.3.Forcedoutageoverlappingamaintenanceoutageforsubstationequipmentoranincomingline.4.Stuckbreaker(failuretoopenwhenneededtoclearthefault).SUBRELcalculatesthefollowingloadpointindices:•FrequencyofInterruption(peryear)•NumberofCircuitsInterruptions(peryear)•OutageDuration(minutesperoutage)•AnnualTotalOutageDuration(minutesperyear)•CustomerMinutesofInterruptionCMI(peryear)•ExpectedUnsuppliedEnergy(EUE)(kWhperyear)•ExpectedOutageCost($peryear)SUBRELalsocalculatesthefollowingsubstationortotalsystemindi