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NPRR352

Summary

Title: Real-Time HSL Telemetry for WGRs
Next Group:
Next Step:
Status: Approved on 05/17/2011
Effective Dates:
06/01/2011

Action

Date Gov Body Action Taken Next Steps
05/17/2011 BOARD Approved
05/05/2011 TAC Recommended for Approval ERCOT Board Consideration
04/21/2011 PRS Recommended for Approval TAC consideration of NPRR352

Voting Record

Date Gov Body Motion Result
05/17/2011 BOARD To approve NPRR352 as recommended by TAC in the 5/5/11 TAC Report. Passed
05/05/2011 TAC To recommend approval of NPRR352 as recommended by PRS in the 4/21/11 PRS Report Passed
04/21/2011 PRS To recommend approval of NPRR352 as submitted and to forward NPRR352 to TAC. 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: Apr 13, 2011
Sponsor: ERCOT
Urgent: Yes
Sections: 6.5.5.2
Description: This Nodal Protocol Revision Request (NPRR) changes the process by which Qualified Scheduling Entities (QSEs) determine the High Sustained Limits (HSLs) to telemeter for Wind-powered Generation Resources (WGRs). The requirement that QSEs set the HSL equal to output immediately following a release from curtailment is removed. Instead QSEs will be expected to use their best judgment to determine the output capability of the WGR with the expectation that the value will consider the net real power of the WGR, turbine availability, weather conditions, and whether the WGR output is being affected by compliance with a Security-Constrained Economic Dispatch (SCED) instruction.
Reason: The logic that has been implemented per the current Protocol language has resulted in the underestimation of potential wind power output following a release from curtailment for individual WGRs. This in turn has led to larger than desired control and response oscillations when operating near system transmission limits. The proposed language will create a more clear and consistent view of the real power capabilities of WGRs for ERCOT’s Dispatch systems.

Key Documents

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