2009 Scenario Reliability Assessment - NERC

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Scenario Reliability Self-Assessmentsresources that are planned to come on-line in 2018 amounts to 4,292 MW. These additionalcapacity additions were taken from the 2009 Long Term Reliability Assessment.The generation mix of the Scenario Case and the Reference Case for 2018 includes wind,nuclear, hydro, coal (steam), oil (steam), oil (combustion turbine), gas (combustion turbine), oil(combined cycle), and a combination of other resources.For Future and Conceptual Capacity resources, SPP uses the Generation Interconnection (GI)and Transmission Service Request (TSR) study process as defined within the SPP Tariff. 97According to the SPP Tariff, at the time the Interconnection Request (IR) is submitted, anInterconnection Customer must request either Energy Resource Interconnection Service (ERIS)or Network Resource Interconnection Service (NRIS); any Interconnection Customer requestingNetwork Resource Interconnection Service may also request that it be concurrently studied forEnergy Resource Interconnection Service, up to the point when an Interconnection Facility StudyAgreement is executed. The Interconnection Customer may then elect to proceed with NetworkResource Interconnection Service or to proceed under a lower level of interconnection service tothe extent that only certain upgrades would be completed.Capacity Transactions on PeakApproximately 1 percent of SPP’s capacity margin depends on purchases from other Regions.Transactions for 2018 are 692 MW purchased from other Regions. These purchases areconsidered firm transactions; 150 MW is firm delivery service from WECC, administered underXcel Energy’s Open Access Transmission Tariff.SPP has a total of 786 MW of firm sales, which includes firm generation and transmission toRegions external to SPP. There are no known issues with the deliverability of imports or exportsbased on existing transmission.SPP members, along with neighboring members including Entergy and others in the SERCRegion, have formed a Reserve Sharing Group. Members of this group receive contingencyreserve assistance from other SPP Reserve Sharing Group members. SPP’s Operating ReliabilityWorking Group sets the minimum daily contingency reserve requirement (approximately 1,600MW) for the SPP Reserve Sharing Group. The SPP Reserve Sharing Group maintains aminimum first contingency reserve equal to the generating capacity of the largest unit ortransmission path scheduled to be on-line.TransmissionThe JCSP study identified several new transmission projects for the SPP Region. These projectsare needed to integrate an additional 20 percent wind into the Region. None of these transmissionprojects have an expected in-service date, as they are still considered conceptual. These projectswill be incorporated into the SPP Integrated Transmission Plan (ITP) in 2010, and will then beassigned in-service dates as needed for reliability or economic reasons. The following projectsare included in either the JCSP, the SPP Transmission Expansion Plan’s 10 year reliabilityassessment, or the Balanced Portfolio of economic upgrades:97 http://www.spp.org/publications/SPP_Tariff.pdf2009 Scenario Reliability Assessment Page 145
Scenario Reliability Self-AssessmentsTable SPP-1: Projected Transmission AdditionsTransmission Project Name Voltage Length In-Service Description/Status(kV) (Miles) DatesTuco-Potter 765 97 N/A ConceptualPotter-Hitchland 765 88 N/A ConceptualHitchland-Finney** 765 100 N/A ConceptualL.E.S.-Muskogee** 765 185 N/A ConceptualTuco-L.E.S.** 765 210 N/A ConceptualMooreland-Commanche** 765 54 N/A ConceptualCommanche-Spearville** 765 51.2 N/A ConceptualSpearville-Knoll* ** 765 76 N/A ConceptualL.E.S.-Elk City 765 82.2 N/A ConceptualElk City-Mooreland 765 72 N/A ConceptualHitchland-Mooreland** 765 117 N/A ConceptualFinney-Spearville** 765 66 N/A ConceptualSummit-Swissvale** 765 104 N/A ConceptualSwissvale-Iatan** 765 51 N/A ConceptualKnoll-Summit** 765 98 N/A ConceptualLang-Wolf Creek 345 24 N/A ConceptualCommanche-Wolf Creek** 765 203 N/A ConceptualWolf Creek- Lacygne** 765 57 N/A ConceptualSedalia –Phill 345 54 N/A Conceptual* These projects are included in the Balance Portfolio study, are proposed to be built at 345kV.** These projects are included in the SPP’s Extra High Voltage (EHV) study, and are proposed to be built at 765kV.Along with the transmission lines listed above, several new transformer additions are includedin either the JCSP or Balanced Portfolio:Table SPP-2: Projected Transformer AdditionsTransformer Project Name High SideVoltage(kV)Low SideVoltage(kV)In-ServiceDateDescription/StatusTuco 765 345 N/A ConceptualPotter 765 345 N/A ConceptualHitchland 765 345 N/A ConceptualFinney 765 345 N/A ConceptualMuskogee 765 345 N/A ConceptualL.E.S. 765 345 N/A ConceptualMooreland 765 138 N/A ConceptualCommanche 765 138 N/A ConceptualSpearville 765 230 N/A ConceptualKnoll345 345 230 N/A ConceptualKnoll765 765 345 N/A ConceptualElk City 765 230 N/A ConceptualIatan 765 345 N/A ConceptualSummit 765 345 N/A ConceptualSwissvale 765 345 N/A ConceptualLacygne 765 345 N/A ConceptualWolf Creek 765 345 N/A ConceptualSedalia 345 161 N/A ConceptualPage 1462009 Scenario Reliability Assessment
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Executive SummaryTransmission Criti
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Background Information for this Rep
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Scenario Reliability Assessment Sum
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Page 180 and 181: About This Reporto Nuclear scenario
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Page 186 and 187: Scenario LetterScenario LetterDecem
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Page 192 and 193: Reliability Assessment Subcommittee
Page 194 and 195: Reliability Assessment Subcommittee
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2009 Scenario Reliability Assessment - NERC

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