PRR659

Title:	Reporting of ERCOT Replacement Reserve Service Procurements
Next Group:
Next Step:
Status:	Approved on 05/16/2006

Date	Gov Body		Next Steps
05/16/2006	Board of Directors	Approved
05/12/2006	TAC	Recommended for Approval
05/09/2006	PRS	Recommended for Approval	Email Vote for Recommended Priority
05/04/2006	TAC	Recommended for Approval	IA review and project prioritization
04/21/2006	PRS	Recommended for Approval	Language review
04/21/2006	PRS
04/21/2006	PRS		Initial review

Date	Gov Body	Motion	Result
05/16/2006	Board of Directors	Approve PRR659 as recommended by TAC	Passed
05/12/2006	TAC	5/12 TAC Email Vote - Recommend a 1.1 priority and 20.5 rank for PRR659.	Passed
05/09/2006	PRS	Recommend a 1.1 priority and 20.5 rank.	Passed
05/04/2006	TAC	Recommend approval of PRR659 as revised by TAC and send to PRS for prioritization and rank assignment	Passed
04/21/2006	PRS	Recommend approval of PRR659 as revised by PRS	Passed
04/21/2006	PRS	Grant urgent status to PRR	Passed

Status:	Approved
Date Posted:	04/03/2006
Sponsor:	TXU Wholesale
Urgent:	Yes
Sections:	1.3.1.1, 6.10.11
Description:	This PRR requires reporting on the classification and amounts of ERCOT�??s procured Replacement Reserve Service (RPRS), as well as a comparison of actual procurements of RPRS for system capacity to a theoretical amount of RPRS procurement for system capacity.
Reason:	ERCOT implemented the RPRS market engine on 3/21/06 to manage Local and Zonal Congestion, as well as for system insufficiencies. As a result, Market Participants will need to be able to review the types and amounts of ERCOT RPRS procurements in order to improve market transparency and for a better understanding on the timing and need for RPRS. This PRR provides for disclosure of information on each unit receiving an RPRS deployment for Local Congestion, the amount of RPRS deployed (in MW) and intervals in which the deployment was received, and the associated transmission studies performed by ERCOT showing the binding constraint. The disclosure concerning RPRS for Local Congestion requested in this PRR is similar to the Board approved PRR 515 (Disclosure of Local Congestion). In addition, this PRR requires ERCOT to compare its RPRS procurements for system capacity to a theoretical amount of RPRS procurements for system capacity. This comparison will allow Market Participants and ERCOT to assess the accuracy of ERCOT�??s day-ahead load forecast and its impact on RPRS deployments and costs.