TAC Report – Impact Assessment
NPRR
Number
256
Timeline
N/A
Synchronize Nodal Protocols with PRR787, Add NonNPRR Compliance Language to QSE Performance Standards
Title
(formerly “Add Violation Language to QSE Performance
Standards”)
Recommended Approval of Impact
Action
Assessment
Date of Decision
September 1, 2011
Effective Date
Upon System Implementation
Priority and Rank
Assigned
Priority – 2013; Rank – 26
Nodal Protocol Section
Grey-Boxed
8.1.1.4.1, Regulation Service and Generation Resource/Controllable
Load Resource Energy Deployment Performance
Revision Description
Reason for Revision
Procedural History
PRS Decision
Summary of PRS
Discussion
TAC Decision
This Nodal Protocol Revision Request (NPRR) aligns the Nodal
Protocols with changes implemented from Protocol Revision
Request (PRR) 787, Add Non-Compliance Language to QSE
Performance Standards (formerly “Add Violation Language to QSE
Performance Standards”), approved by the ERCOT Board on
8/18/09, and addresses the exclusion of Generation Resource
Energy Deployment Performance (GREDP) during testing periods.
To align the Nodal Protocols with PRR787 and exempt Generation
Resources from GREDP calculation during testing and qualification
periods. Current Nodal Protocols also call for updating Ancillary
Service Schedule during qualification differently than when
monitoring Ancillary Service performance. This NPRR synchronizes
those updates to use the same timeline.
 On 11/16/10, the ERCOT Board considered NPRR256.
 On 6/7/11, a revised Impact Analysis was posted.
 On 6/22/11, a Cost Benefit Analysis was posted.
 On 6/23/11, PRS considered the impact assessment for
NPRR256.
 On 7/7/11, TAC considered the impact assessment for NPR256.
 On 9/1/11, TAC again considered the impact assessment for
NPRR256.
On 6/23/11, PRS unanimously voted to endorse and forward the
impact assessment for NPRR256 with a recommended priority of
2013 and rank of 26 to TAC. All Market Segments were present for
the vote.
On 6/23/11, it was explained that the Cost Benefit Analysis was
based on the assumption that implementation of NPRR256 would
avoid a staffing impact for ERCOT.
On 7/7/11, TAC unanimously voted to table the impact assessment
for NPRR256. All Market Segments were present for the vote.
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TAC Report – Impact Assessment
Summary of TAC
Discussion
Board Decision
On 9/1/11, TAC voted to recommend approval of the impact
assessment for NPRR256 as recommended by PRS in the 6/23/11
PRS Report – Impact Assessment. There was one abstention from
the Independent Power Marketer (IPM) Market Segment. All Market
Segments were present for the vote.
On 7/7/11, ERCOT Staff suggested that the impact assessment for
NPRR256 be tabled until all Phase 2 and 3 Parking Deck impact
assessments are ready for TAC consideration.
On 9/1/11, the impact assessment for NPRR256 was reviewed.
Concern was expressed regarding the Priority of 2013 and having to
wait until then for the implementation of NPRR256.
On 11/16/10, the ERCOT Board approved NPRR256 as
recommended by TAC in the 11/4/10 TAC Report.
Sponsor
Name
Henry Durrwachter
E-mail Address
hdurrwachter@luminant.com
Company
Luminant Energy Company LLC
Phone Number
214-875-9285
Cell Number
214-437-4622
Market Segment
Investor Owned Utility (IOU)
Market Rules Staff Contact
Name
Ann Boren
E-Mail Address
aboren@ercot.com
Phone Number
512-275-7411
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