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  • 2015 TPL

    Steady State Scope

    Engineering

    TWG approved 3/18/2015

  • 2015 TPL Steady State Scope 1

    Revision History

    Date or Version Number Author Change Description

    11/14/2014 SPP Staff Initial Draft

    12/30/2014 SPP Staff Update based on the 12/22/2014 TPLTF meeting

    1/20/2015 SPP Staff Update based on the January TPLTF meetings

    2/10/2015 SPP Staff Update based on the February TPLTF meeting

    2/24/2015 SPP Staff Update based on TWG and TPLTF guidance

    3/6/2015 SPP Staff Update based on TPLTF guidance

  • 2015 TPL Steady State Scope 2

    Table of Contents Revision History ...........................................................................................................................................1

    Overview .......................................................................................................................................................3

    Data inputs ....................................................................................................................................................4

    Modeling data ..................................................................................................................................4

    Data required by the PC ...................................................................................................................5

    Initial Data request to the TP.................................................................................................................... 5

    Subsequent Data requests to TP ............................................................................................................... 5

    Steady State Study .......................................................................................................................................6

    Model set ..........................................................................................................................................6

    Software parameters.........................................................................................................................6

    Monitored facilities ..........................................................................................................................6

    Basecase Analysis ............................................................................................................................7

    Basecase Contingency Analysis ......................................................................................................7

    Auto N-1 analysis ..................................................................................................................................... 8

    Auto N-2 analysis ..................................................................................................................................... 8

    Long lead time analysis ............................................................................................................................ 8

    Cascading analysis ................................................................................................................................... 9

    Protection System analysis ....................................................................................................................... 9

    Sensitivity-case Analysis ...............................................................................................................10

    Corrective Action Plan (CAP) .......................................................................................................10

    Transmission Planner CAP .................................................................................................................... 10

    Optimal Mitigation Measures (OPM) CAPs .......................................................................................... 11

    Deliverables ..................................................................................................................................................11

    Assessment Distribution ..............................................................................................................................12

    Schedule ........................................................................................................................................................13

    Changes in Process and Assumptions ........................................................................................................15

    Appendix A ...................................................................................................................................................1

    Appendix B ...................................................................................................................................................1

  • 2015 TPL Steady State Scope 3

    Overview

    This document presents the scope and schedule of work for the NERC TPL-001-4 (TPL) Steady

    State Assessment. 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 TPL-001-4, 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 be finalized by December 2015.

    1 In this document, SPP does not represent a TP.

  • 2015 TPL Steady State Scope 4

    Data inputs

    Modeling data

    Modeling data required in the TPL steady state study is incorporated through the annual SPP Model

    Development Working Group (MDWG) model building process. The MDWG model building

    process is performed in accordance with the applicable NERC Modeling, Data, and Analysis (MOD)

    Standards. In order to meet the R1 requirements, the models will represent the following:

     Existing Facilities

     Known outage(s) of generation or Transmission Facility (ies) with a duration of at least six months.

     New planned Facilities and changes to existing Facilities

     Real and reactive Load forecasts

     Known commitments for Firm Transmission Service and Interchange

     Resources (supply or demand side) required for Load

    The model set in the table below establishes category P0 as the normal System condition in TPL-

    001-4 Table 1 (Table 1), and defines the models that will be used for the 2015 TPL steady state

    analyses. The models were chosen to comply with requirement R2.1.1, R2.1.2, R2.2.1 (Base case)

    and R2.1.4 (Sensitivity case). The PC interprets Year one as the current year of the study plus one

    year.

    Requirement Description Base case Sensitivity case

    R2.1.1 Year 1 peak MDWG 2016S ITPNT 2016SP5

    R2.1.1 Year 5 peak MDWG 2020S ITPNT 2020SP5

    R2.1.2 Year 1 off-peak MDWG 2016L ITPNT 2016L5

    R2.2.1 Year 10 peak MDWG 2025S N/A

  • 2015 TPL Steady State Scope 5

    Data required by the PC

    Initial Data request to the TP

    The initial data request focuses on collecting contingencies that will be used during the steady state

    analysis performed by the PC.

    During the annual MDWG model build process, an email requesting the TP supplied contingency

    definitions will be sent to the appropriate stakeholders as scheduled. The PC recommends the TPs

    follow the SPP contingency naming convention when deriving names for each contingency

    definition. The SPP contingency naming convention document will accompany the annual data

    request. For those TPs who have implemented a different contingency naming convention, the TP

    must provide its naming convention to the PC along with the contingency definitions.

    The list below summarizes the type of contingency data the PC expects to receive during the annual

    contingency request.

    1. A list of Table 1 contingencies that are expected to produce more severe System impacts. a. Planning events (P1, P2, P4, P5, and P7)2 b. Extreme events (EE.SS.1 – EE.SS.3b)3

    2. A list of contingencies on systems adjacent to the TP and PCs Systems which may impact their Systems.4

    The TPs and PC will coordinate with adjacent PCs and TPs to ensure Contingencies on adjacent

    Systems which may impact their Systems are included in the Contingency list. This is an addition to

    the TP submitted contingencies list.

    Subsequent Data requests to TP

    The subsequent data requests will focus on collecting the applicable monitored elements, spare

    equipment facilities, Protection System contingencies, and the Corrective Action Plans (CAPs) for

    the potential TPL R5 voltage and SPP Criteria thermal violations (violations) found during the

    steady state study performed by the PC. The PC may request additional data to support the study

    and assessment as needed.

    The list below summarizes the type of data that will be collected during scheduled Subsequent Data

    requests

    1. A Bulk Electric System (BES) inclusion list to be monitored in addition to 69 kV and above buses in the PC footprint.

    2. A Spare Equipment strategy facility list.5 o A list of equipment that if lost would result in a year or

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