PRR841

Title:	Revise Total ERCOT Wind Power Forecast (TEWPF)
Next Group:
Next Step:
Status:	Approved on 03/23/2010
Effective Date:	04/01/2010

Date	Gov Body		Next Steps
03/23/2010	Board of Directors	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

Date	Gov Body	Motion	Result	Against	Abstentions
03/23/2010	Board of Directors	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	0	0
02/18/2010	PRS	To endorse and forward the 1/21/10 PRS Report and Impact Analysis for PRR841 to TAC.	Passed	0	0
01/21/2010	PRS	To recommend approval of PRR841 as amended by the 12/22/09 ERCOT comments.	Passed	0	0

Status:	Approved
Date Posted:	11/30/2009
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.