IMO Connection Assessment - Murray TS

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1、CONNECTIONASSESSMENT&APPROVALPROCESSASSESSMENTSUMMARYApplicant:HydroOneNetworksInc.Project:NiagaraMurrayTS:EstablishTwoNew13.8kVFeederPositionsCAAID:2002-EX040ConsistentInformationSetDepartmentLongTermForecasts&AssessmentsDepartmentDate:October21,2002AssessmentSummaryCAA2002-EX040Hyd

2、roOneNetworksInc.NiagaraMurrayTS–EstablishTwoNew13.8kVFeederPositions1.0DescriptionofProposalHydroOneNetworksInc.(HONI)isplanningtoaddtwonew13.8kVfeederpositionsattheexistingNiagaraMurrayTStosupplyforecastloadgrowthinthearea.NiagaraMurrayTS,asshowninFigure1,isconnectedtothe115kVAllan

3、burgTSviathetransmissioncircuitsA36/37NandtoSirAdamBeckGS#1viathetransmissioncircuitQ4N.Thestation,asshowninFigure1,hastwoDESNcomponentswitheachDESNcontainingtwo3-phase3-winding110-14.2-14.2kV±20%45/60/75MVAtransformers.TheproposednewfeederpositionswillbeaddedtotheT13/T14DESN.Thesche

4、duledin-servicedatefortheworkisApril2003.2.0AssessmentCompliancewithMarketRulesThe2001peakdemandattheNiagaraMurrayTST13/T14DESNwasabout52MVA.Theloadisexpectedtoincreaseby3MWbyDecember2003andupto10MWinthenexttenyears.TheratedMVAcapabilitiesofeachofthetwotransformersT13andT14are45/60/7

5、5MVA.Witheitherbankoutofservicetheremainingtransformerwouldstillbecapableofsupplyingtheanticipatedpeakdemandfortheforecastperiod.InformationprovidedbytheapplicantindicatesthattheexistingloadssuppliedfromT13/T14havea0.92laggingpowerfactorandthenewloadsareexpectedtohavesimilarpowerfact

6、or.Inaddition,thereisa14.4kV21.6Mvarcapacitorbankatthestationforpowerfactorcorrection.Itisthereforeexpectedthatthestationwillbeoperatingwithinthe0.9laggingto0.9leadingpowerfactorrangeandisincompliancewiththeMarketRules.Thereisnounderfrequencyloadshedding(UFLS)facilitiesatNiagaraMurra

7、yTS.IthasbeendecidedthatUFLSisnotrequiredatNiagaraMurrayTSatthistime.IMOperiodicallyreviewstheUFLSrequirementsinthesystemandwillinformHONIifinthefutureitisdeemednecessarytohaveUFLSatNiagaraMurrayTS.TransformersT13andT14areequippedwithunderloadtapchangerswitharangeof±2.84kV(±20%ofLVwi

8、ndingvoltage