SPP 2015 TPL-001-4

SPP 2015 TPL-001-4Short Circuit Planning Assessment forUpper Missouri Zone Entities12/30/2015SPP Engineering

Southwest Power Pool, Inc.Revision HistoryRevision HistoryDateAuthorChange Description12/23/2015SPP staffInitial Draft12/30/2015SPP staffFinal DraftSPP 2015 TPL-001-4 Short Circuit Planning Assessment for Selected UMZ Entities2

Southwest Power Pool, Inc.Table of ContentsTable of ContentsREVISION HISTORY . 2TABLE OF CONTENTS . 3LIST OF TABLES. 4PURPOSE . 5MODELS . 6STUDIES . 73.1: TPL-001-4 Short Circuit Study . 73.2: Simulation . 73.3: Corrective Action Plans and Member Review . 7ENTITIES INVOLVED . 8RESULTS. 95.1: TPL-001-4 Short Circuit Study . 95.2: Totals by Modeling Area . 9SUMMARY . 112015 TPL SHORT CIRCUIT SCOPE . 12SPP 2015 TPL-001-4 Short Circuit Planning Assessment For Selected UMZ Entities3

Southwest Power Pool, Inc.List of TablesList of TablesTable 2.1: Models used in TPL-001-4 short circuit studies . 6Table 4.1: Entities included in the TPL-001-4 Short Circuit study . 8Table 5.1: TPL-001-4 Potential Violations . 9Table 5.2: Potential Violation Totals by Model Area . 10SPP 2015 TPL-001-4 Short Circuit Planning Assessment for Selected UMZ Entities4

Southwest Power Pool, Inc.Section 1: PurposePurposeThe objective of the 2015 TPL-001-4 Short Circuit Assessment (assessment) is to report findings fromthe 2015 TPL-001-4 short circuit studies along with an associated evaluation of the study results insupport of SPP’s compliance, as a Planning Coordinator (PC), with the NERC TPL-001-4 ReliabilityStandard.The goals of this assessment are:1. Determine whether circuit breakers have interrupting capability for Faults that they will beexpected to interrupt. (R2.3)2. Report Corrective Action Plans (CAPs) to address the Equipment Rating violations. (R2.8)This assessment focuses on certain transmission facilities in the SPP footprint of Corn Belt ElectricCooperative (Corn Belt), Missouri Basin Municipal Power Agency (MRES), and Heartland ConsumersPower District (Heartland), collectively known as the Upper Missouri Zone Entities (UMZ Entities), andsummarizes potential criteria violations and the associated CAPs developed by the affected entities andthe SPP PC.SPP 2015 TPL-001-4 Short Circuit Planning Assessment For Selected UMZ Entities5

Southwest Power Pool, Inc.Section 2: ModelsModelsThe 2015 SPP Model Development Working Group (MDWG) short circuit models reflect systemconditions for the Near-Term Transmission Planning Horizon. These models are updated by TPs toreflect the most current information using the Model On Demand (MOD) program. The SPP 2015 SeriesMDWG Final Short Circuit Maximum Fault Models were used in the 2015 TPL planning studies asreflected in Table 2.1.ModelScopeSeasonalAssessmentModel UsedModel ReleasedAssessmentCompletedNearTerm2016 SummerPeak2015MDWGFINALSC Classical MAX FAULT-16SApril 2015November 2015Table 2.1: Models used in TPL-001-4 short circuit studiesSPP 2015 TPL-001-4 Short Circuit Planning Assessment for Selected UMZ Entities6

Southwest Power Pool, Inc.Section 3: StudiesStudies3.1: TPL-001-4 Short Circuit StudyAnalysis results on the SPP 2015 MDWG Final Short Circuit Maximum Fault models used for the PCassessment were provided to the UMZ Entities. The UMZ Entities were also provided the option toperform their own short circuit analysis in lieu of the PC provided results.3.2: SimulationFault current values were determined for each bus modeled in SPP model areas using Power SystemSimulation for Engineering (PSS/E) activities Automatic Sequencing Fault Calculation (ASCC) andANSI fault current calculation (ANSI) for Single Line to Ground and Three Phase faults. Results fromboth activities included system intact faults and activity ASCC also included Line Out faults.3.3: Corrective Action Plans and Member ReviewThe UMZ Entities evaluated the applicable results and provided CAPs to the PC, if necessary. Ifnecessary, the PC verified validity of the submitted CAPs.SPP 2015 TPL-001-4 Short Circuit Planning Assessment For Selected UMZ Entities7

Southwest Power Pool, Inc.Section 4: Entities InvolvedEntities InvolvedThe following entities registered with the Midwest Reliability Organization (MRO) Regional Entitywere included in this TPL Short Circuit Analysis.Entity NameCorn Belt Electric Cooperative (Corn Belt)Heartland Consumers Power District (Heartland)Missouri Basin Municipal Power Agency (MRES)Registered FunctionDP, RP, TO, TOP, TPRP, TOGO, GOP, RP, TOTable 4.1: Entities included in the TPL-001-4 Short Circuit studyDP : Distribution ProviderGO : Generation OwnerGOP: Generator OperatorRP: Resource PlannerTO: Transmission OwnerTOP: Transmission OperatorTP: Transmission PlannerSPP 2015 TPL-001-4 Short Circuit Planning Assessment for Selected UMZ Entities8

Southwest Power Pool, Inc.Section 5: ResultsResultsCAPs to address potential violations consisted of the following: No CAPs were required.5.1: TPL-001-4 Short Circuit StudyThe SPP 2015 MDWG Final Short Circuit Maximum Fault models used for the short circuit study didnot result in potential violations. Table 5.1 lists a summary of these potential violations.Season2016 SummerTotalMitigated RemainingViolations Findings Violations000Table 5.1: TPL-001-4 Potential Violations5.2: Totals by Modeling AreaTable 5.2 below summarizes the potential violations by modeling area. Note that the UMZ Entities donot have unique modeling areas as their transmission facilities are embedded within other SPP modelingareas, specifically Area 652, WAPA.SPP 2015 TPL-001-4 Short Circuit Planning Assessment For Selected UMZ Entities9

Southwest Power Pool, Inc.Section 5: sMitigatedFindingsRemainingViolationsCorn Belt ElectricCooperative652000Heartland ConsumersPower District652000Missouri RiverEnergy Services652000Table 5.2: Potential Violation Totals by Model AreaSPP 2015 TPL-001-4 Short Circuit Planning Assessment for Selected UMZ Entities10

Southwest Power Pool, Inc.Section 6: SummarySummaryThe MDWG models developed by the SPP RTO and its Members represent the power system for theSPP PC. These models did not identify potential equipment rating violations for the UMZ Entitiestransmission systems. No CAPs were required as a result of the analysis.SPP 2015 TPL-001-4 Short Circuit Planning Assessment For Selected UMZ Entities11

Southwest Power Pool, Inc.Section 7: 2015 TPL Short Circuit Scope2015 TPL Short Circuit ScopeSPP 2015 TPL-001-4 Short Circuit Planning Assessment for Selected UMZ Entities12

Southwest Power Pool, Inc.Section 7: 2015 TPL Short Circuit Scope2015 TPLShort Circuit ScopeEngineeringTWG approved on 3/18/20152015 SPP TPL-001-4 Short Circuit Assessment

Southwest Power Pool, Inc.Section 7: 2015 TPL Short Circuit ScopeRevision HistoryDate or VersionNumberAuthorChange Description12/30/2014SPP StaffInitial Draft2/10/2015SPP StaffUpdate based on the FebruaryTPLTF meetings3/6/2015SPP StaffUpdate based on memberfeedback3/9/2015SPP StaffUpdate based on the March 9thTPLTF meeting2015 SPP TPL-001-4 Short Circuit AssessmentComments15

Southwest Power Pool, Inc.Section 7: 2015 TPL Short Circuit ScopeTable of ContentsREVISION HISTORY . 15OVERVIEW . 17DATA INPUTS . 18MODELING DATA . 18DATA REQUIRED BY THE PC . 19Initial Data request . 19Subsequent Data request . 19SHORT CIRCUIT SIMULATION . 20ANALYSIS . 20SOFTWARE PARAMETERS . 20DELIVERABLES. 22ASSESSMENT DISTRIBUTION . 23SCHEDULE . 24CHANGES IN PROCESS AND ASSUMPTIONS . 262015 SPP TPL-001-4 Short Circuit Assessment16

Southwest Power Pool, Inc.Section 7: 2015 TPL Short Circuit ScopeOverviewThis document presents the scope and schedule of work for the NERC TPL-001-4 Short CircuitAssessment. This document will be reviewed by the Transmission Planning Task Force (TPLTF),Transmission Working Group (TWG), and the applicable functional entities as described in NERC TPL001-4, A.4.1. SPP, as the Planning Coordinator (PC1), will coordinate with the Transmission Planners(TP) to exchange data. The assessment begins in January 2015 and is a 12-month study scheduled to befinalized by December 2015.1In this document, SPP does not represent a TP.2015 SPP TPL-001-4 Short Circuit Assessment17

Southwest Power Pool, Inc.Section 7: 2015 TPL Short Circuit ScopeData inputsModeling dataModeling data required in the TPL Steady State study is incorporated through the annual SPP MDWGmodel building process. The SPP MDWG model building process is performed in accordance with theapplicable NERC Modeling, Data, and Analysis (MOD) Standards. In order to meet the R1requirements, the models must represent the following: Existing FacilitiesKnown outage(s) of generation or Transmission Facility(ies) with a duration of at least sixmonthsNew planned Facilities and changes to existing FacilitiesReal and reactive Load forecastsKnown commitments for Firm Transmission Service and InterchangeResources (supply or demand side) required for LoadHowever, these requirements are not applicable in determining the interrupting capability of circuitbreakers required for Faults for all system conditions. The System short circuit model with all plannedgeneration and Transmission Facilities in service is represented with the following additionalrequirements: Place all available facilities in-service:o Generationo Transmission lines (Out for maintenance)o Transformerso BusesFlat – classical fault analysis conditionsThe model set in the table below establishes category P0 as the normal System condition in TPL-001-4Table 1, and defines the models that will be used for the 2015 TPL short circuit analyses. These modelswere chosen to comply with requirement R2.3RequirementR2.3DescriptionYear 12015 SPP TPL-001-4 Short Circuit AssessmentStudy caseMaximum Fault Short Circuit MDWG 2016S18

Southwest Power Pool, Inc.Section 7: 2015 TPL Short Circuit ScopeData required by the PCInitial Data requestThere is not an initial data request for ASCC results, because the PC will run a short circuit analysis onall buses in the short circuit model within the PC footprint.For TPs that require ANSI Fault Current calculation, each TP will provide to the PC the following ANSIFault Current Calculation parameters to be used for each bus within the TP area: Divisorso For branches in positive sequenceo For machines in positive sequenceo For branches in zero sequenceo For machines in zero sequence Fault multiplying factorso DC decrement only or AC and DC decrement Max operating voltage, in PU Contact parting times, in secondsSubsequent Data requestCorrective Action Plans for instances where the short circuit current interrupting duty exceeds theequipment rating.2 Use of Activity ANSI requires a second step involving line-out cases if the full busfault current exceeds the interrupting capability of the breaker under review. The TP will provide alisting of each bus number for which a line-out analysis is required for Activity ANSI to be performedby the PC.2R2.82015 SPP TPL-001-4 Short Circuit Assessment19