Title Revise Total ERCOT Wind Power Forecast (TEWPF)
Next Group
Next Step
Status Approved on 03/23/2010
Effective Dates


Date Gov Body Action Taken Next steps
03/23/2010 BOARD Approved
03/04/2010 TAC Recommended for Approval ERCOT Board consideration of PRR841
02/18/2010 PRS Recommended for Approval TAC consideration of PRR841
01/21/2010 PRS Recommended for Approval PRS Impact Analysis review

Voting Record

Date Gov Body Motion Result
03/23/2010 BOARD To approve PRR841 as recommended by TAC in the 3/4/10 TAC Report. Passed
03/04/2010 TAC To recommend approval of PRR841 as recommended by PRS in the 2/18/10 PRS Report. Passed
02/18/2010 PRS To endorse and forward the 1/21/10 PRS Report and Impact Analysis for PRR841 to TAC. Passed
01/21/2010 PRS To recommend approval of PRR841 as amended by the 12/22/09 ERCOT comments. Passed


Status: Approved
Date Posted: Nov 30, 2009
Sponsor: Luminant
Urgent: No
Sections: 2.1, 2.2, 4.4.15, 4.5.12
Description: This Protocol Revision Request (PRR) revises the probability of exceedance percentage applicable to the Total ERCOT Wind Power Forecast (TEWPF) from 80% to 50% to better reflect the total ERCOT Wind-powered Generation Resource (WGR) production that has been historically experienced.
Reason: These revisions are intended to better reflect the actual accuracy experienced by ERCOT’s use of the AWS Truewind forecast of wind generation in the ERCOT TEWPF based on historical information presented at the November 10, 2009 QSE Managers Working Group (QMWG) meeting. This change is also necessary to comport with the ERCOT Board remand of PRR811, Real Time Production Potential, to the Technical Advisory Committee (TAC) due to a lack of a specific calculation methodology for the Real Time Production Potential (RTPP) of a WGR.

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