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NPRR178

Summary

Title: Regulation Reduction (GS-FR3) and Reg-Up/Reg-Down Allocation to QSEs
Next Group:
Next Step:
Status: Approved on 08/18/2009
Effective Dates:
12/01/2010

or per the Nodal Protocol Transition Plan http://www.ercot.com/mktrules/protocols (09/01/09 Nodal Protocols Library)

Action

Date Gov Body Action Taken Next Steps
08/06/2009 TAC Recommended for Approval ERCOT Board consideration
06/18/2009 PRS Recommended for Approval PRS IA Review
07/23/2009 PRS Recommended for Approval TAC Consideration
08/18/2009 BOARD Approved

Voting Record

Date Gov Body Motion Result
08/06/2009 TAC To recommend approval of NPRR178 as recommended by PRS Passed
06/18/2009 PRS To recommend approval of NPRR178 Passed
07/23/2009 PRS To endorse and forward the PRS Recommendation Report and Impact Analysis for NPRR178 to TAC. Passed
08/18/2009 BOARD To approve NPRR178 as recommended by TAC in the 8/6/09 TAC Recommendation Report Passed

Vote tallies here reflect individual votes, not the weight of the votes by market segment. Affirmative votes are not recorded in these vote tallies. For additional details on the voting record, please consult the Recommendation or Action Report, or the official vote tally if available, as posted in the key documents.

Background

Status: Approved
Date Posted: May 26, 2009
Sponsor: ERCOT
Urgent: No
Sections: 6.5.7.6.1
Description: The purpose of this Nodal Protocol Revision Request (NPRR) is to bring the Nodal Protocols in line with the nodal program implementation: * Changes to the regulation reduction calculation to account for movements in generation due to units getting updated Base Points from Load Frequency Control (LFC). * The other change is regarding the Regulation Up (Reg-Up)/Regulation Down (Reg-Down) allocation to Qualified Scheduling Entities (QSEs) to take out the constraint for each four-second interval, since the full amount of Reg-Up/Reg-Down responsibility is realizable in five-minutes and compliance is also on a five-minute basis.
Reason: By utilizing the movement of other units toward their Base Points, it is expected that this will result in improved frequency control and better operation. The regulation requests for each control cycle of each QSE are limited to 125% of the total amount of Regulation Service in ERCOT divided by the number of control cycles in five minutes. Since the full amount of Reg-Up/Reg-Down responsibility is realizable in five-minutes and compliance is also on a five-minute basis, there is no explicit need to constrain the QSE regulation requests in each control cycle.

Key Documents

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