Transmission System Planning Performance
WECC Regional Criterion
TPL-001-WECC-CRT-3
Document name / Transmission System Planning PerformanceWECC Regional Criterion
TPL-001-WECC-CRT-3
Category / (X)Regional Criterion
Document date
Adopted/approved by / WECC Board of Directors
Date adopted/approved
Custodian / Standards
Stored/filed / URL: Approved Regional Business Practices
Previous name/number / (ifany) The nomenclature for this document changed from “CRT” to “RBP” on September 5, 2012. It changed back again on June 24, 2014.
This document is iterative of TPL-(001 thru004)-WECC-RBP-1, followed by TPL-001-WECC-RBP-2.1.
Status / ( ) Version 2 Effective Date was April 1,2012
( ) Version 3 Effective Date is TBA
( )supersededby
()other
() obsolete/archived
Version Control
Version / Date / Action / ChangeHighlights1 / March 6, 2008 / WECC Planning Coordination Committee (PCC) approved TPL-(001 thru 004)-WECC-1-CR. / Reliability Subcommittee translates existing WECC components of NERC/WECC Planning Standards into a CRT.
1 / April 16, 2008 / WECC Board of Directors (Board) approved / No substantive changes
2 / October 13, 2011 / PCC approves / Clarifies “corridor”
2 / December 1, 2011 / Board approves / No substantive change
2 / September 5, 2012 / Board approves / Approved a nomenclature change from “CRT” to “RBP”
2.1 / August 6, 2013 / Errata / WM2 Measure moved to WM3.WM3 Measure moved to WM4.WM4 Measure moved to WM2.
2.1 / December 5, 2013 / Board approves / On October 8, 2013, the Ballot Pool voted to retire WR1, WR2, WR4 and WR5 of TPL-(012 through 014)-WECC-RBP-2 as of the Effective Date of NERC TPL-001-4. On December 5, 2013, the Board ratified that decision.
2.1 / June 24, 2014 / Board changed the RBP designation to that of CRT / No substantive change, only designation.
3 / Pending
Document Scope
This document is designed to address the substance of TPL-001-WECC-CRT-2.1, WECC Requirement WR3 and the requirements imposed by NERC TPL-001-4, Requirements R5 and R6.
Draft One
Draft One is designed to open an industry dialogue to ensure the direction of the draft aligns with the needs of the industry. Draft One is not intended to be a final work product; rather, is it the springboard from which the drafting team will proceed. The drafting team welcomes comments on all aspects of the document.
To assist the industry in this development process, Mr. Charles Matthews, the team’s chair, anticipates presentation of this document to the Planning Coordination Committee (PCC) during the October 7, 2014 meeting.
Measures and a Guidance Section will be developed once the substance of the Requirements is further developed.
Table W-1
Revision of Table W-1 is within the scope of this project. The drafting team understands that the Table is currently under review by the WECC Reliability Subcommittee (RS). The team will coordinate any changes with the RS.
Procedural Background
On September 5, 2012,the WECC Board of Directors (Board) adopted a recommendation by the Regional CriteriaWorkGroup(RCWG) changing the designation of this document from a WECC Criterion (CRT) to a WECC Regional Business Practice (RBP). On June 24, 2014, the Board reversed that decision and designated this document as a CRT.
In further keeping with the September 5, 2012 recommendation, on November 28, 2012, a Standards Authorization Request (SAR) was submitted to evaluate whether this document should be drafted as a WECC Regional Reliability Standard (RRS).
On December 19, 2012, the WSC accepted the WECC-0100 SAR as drafted with specific approval to assign an evaluation team to review the subject matter and return a recommendation to the WSC.
On June 26, 2013, the WSC approved the evaluation team’s recommendation to ballot the retirement of TPL-001-WECC-RBP-2.1, WR1, WR2, WR4 and WR5, coincident with the Effective Date of NERC’s TPL-001-4, because the content of the WECC Requirements will be resident in the NERC TPL.
On August 8, 2013, the WSC assigned the original drafting team, augmenting the team during later weeks.
On October 8, 2013, a WECC Ballot Pool voted to retire TPL-(012 through 014)-WECC-RBP-2.1, WR1, WR2, WR4 and WR5 of the Effective Date of NERC TPL-001-4. (The Effective Date is projected for approximately January 1, 2016. It should be noted that the TPL has a staggered Effective Date.)
On November 1, 2013, the WECC-0100 Drafting Team (DT):
1) Reported completion of the tasks assigned in the WECC-0100 Standard Authorization Request (SAR),
2) Requested the WECC Standards Committee (WSC) deem the WECC-0100 SAR complete; and,
3) Requested the WSC accept the DT’s recommendation to proceed with informal drafting in support of an iterative SAR tailored to the remedial needs of TPL-001-WECC-RBP-2.1, System Performance, WR3 as well as a more granular implementation plan of TPL-001-4, Transmission System Planning Performance Requirements Requirement R5 and R6.
In light of the retirement of the TPL-001-WECC-RBP-2’s Requirements WR1, WR2, WR4 and WR5, the drafting team reported that an update of the associated Table W-1 was underway by the Reliability Subcommittee.
The WSC agreed to expand the WECC-0100 drafting team to include the entire Reliability Subcommittee, and accept the drafting team’s recommendation that further drafting continue on remedial language for:
1) TPL-001-WECC-RBP-2.1. WR3;
2) Table W-1; and,
3) TPL-001-4, Requirements R5 and R6.
On December 5, 2013, the Board approved the decision to retire portions of the WECC TPL upon the Effective Date of the NERC TPL.
During June 2014, the Planning Coordinating Committee (PCC) conducted a straw poll concluding the most appropriate document categorization for this document should be that of a WECC Regional Criterion.
On June 24, 2014, the Board changed the designation of this document from that of a RBP to that of CRT.
Implementation Plan
To be developed.
Project Roadmap
This section is maintained by the drafting team and is subject to change.
Completed Actions / Completion Date- SAR Filed
- Review Team files Preliminary Recommendation
- WSC approves ballot to retire WR1, WR2, WR4 and WR5.
- Notice of Joint Session to discuss retirement
- Ballot Pool open asking for retirement of WR1, WR2, WR4 and WR5
- WSC approves Drafting Team
- Ballot Pool closed asking for retirement of WR1, WR2, WR4 and WR5
- Joint Session to discuss retirement
- Ballot open asking for retirement of WR1, WR2, WR4 and WR5
- Drafting Team – First Meeting – Orientation
- Ballot closed asking for retirement of WR1, WR2, WR4 and WR5. Retirement approved.
- Version 3 – Posting 1– Open 45 Day Comment Period
- Version 3 – Posting 1 – Closed
- Version 3 – Posting 2 - Open 30 Day Comment Period
- Version 3 – Posting 2- Closed
- Version 3 – Posting 3 - Open 30 day Comment Period
- Version 3 – Posting 3 - Posted – Closed
- DT meets for final Comments / Forward to WSC
- WSC Meets
- Open Ballot Pool
- Joint Session – Notice
- Close Ballot Pool
- Joint Session
- Open Ballot
- Ballot Closed
- WSC Meets
- Notice to WECC Board of Directors
- Board
Definitions of Terms Used in the Standard
No new terms are proposed.
A. Introduction
1. Title:Transmission System Planning Performance
WECC Regional Criterion
2. Number:TPL-001-WECC-CRT-3
3. Purpose:To ensure the coordinated planning of the Western Interconnection under normal and abnormal conditions, and to ensure the availability of that planning information.
4.Applicability
4.1.Functional Entities
4.1.1PlanningCoordinator
4.1.2TransmissionPlanner
4.2.Facilities
4.2.1This document applies to studies conducted in both the near-term and the long-term planning horizons.
This document applies only to Bulk Electric-System (BES) substation buses.
Each of the following elements is specifically excluded:
1)Line side series capacitor buses;
2)Line side series reactor buses;
3)Shunt capacitor buses
4)Shunt reactor buses
5)Metering, fictitious, or other points of interconnection modeled solely for measuring electrical quantities; and
6)Other buses specifically excluded by each PC or TP internal to their system.
6.EffectiveDate:Coincident with the Effective Date of NERC Standard TPL-001-4, Transmission System Planning Performance Requirements
B. Requirements and Measures
R1.Each Transmission Planner and Planning Coordinator shall use the following minimum criteria in its Planning Assessment: [Addressing NERC TPL R5, R6]
R1.1Steady-state voltages at all applicable Bulk-Electric System (BES) buses shall stay within each of the following limits [Addressing NERC TPL R5]:
1)95% to 105% of nominal for P0[1] event (system normal),
2)90% to 110% of nominal for P1-P7 events (contingency).
R1.2Post-Contingency steady-state voltage deviation at each applicable BES bus serving load (having nointermediate connection) shall notresult in voltage deviation exceeding eight percent for P1 events. [Addressing NERC TPL R5]
R1.3Voltage stability is identified by maintaining positive reactive power margin demonstrated by the following criteria: [TPL R6]
1)All P0-P1 events solve at a minimum of 105% of transfer path flow or forecasted peak load,
2) All P2-P7 events solve at a minimum of 102.5% of transfer path flow or forecasted peak load.
R1.4Transient voltage response shall be verified by demonstrating that for all P1-P7 category events, the transient voltage response at applicable BES buses shall recover to 80% of pre-contingency voltage within 10 seconds of the initiating event.
R2.Each Transmission Planner and Planning Coordinator shall investigate the potential for Cascading and uncontrolled islanding, if one or more of the following are observed in its Planning Assessment studies: [TPL R6]
- Thermal overload on a Facility exceeds the phase protective relay settings described in NERC PRC-023-2 Transmission Relay Loadability,and trips.
- Any single generator pulls out of synchronism and trips.
- The transient voltage response at any BES bus is outside of the voltage ride-through criteria defined in Requirement R1.3.2 of this document, after a delayed fault clearing disturbance.
C.Measures
Measures will be developed after further development of Requirements.
M1.Each [Applicable Entity] will have evidence that its reactive power planning included each of the required elements stated in Requirement R1. Evidence may include but is not limited to [state it].
M2.Each [Applicable Entity] will have evidence that its reactive power planning included each of the required elements stated in Requirement R2. Evidence may include but is not limited to [state it].
Guidance Section
A Guidance Section is contemplated to explain certain variables and suggest alternative approaches to meet the Requirements. This section will be further developed as the Requirements near final drafting.
Developed as WECC-0100Page 1
[1] Those points identified as “P” in this document refer directly to the NERC Standard TPL-001-4, Transmission System Planning Performance Requirements, Table-1 Steady State and Stability Performance Planning Events.