PRR762

Title:	West Zone SCE Performance Conditions
Next Group:
Next Step:
Status:	Approved on 06/17/2008

Date	Gov Body		Next Steps
06/17/2008	Board of Directors	Approved
06/05/2008	TAC	Recommended for Approval	Consideration by the ERCOT Board.
05/22/2008	PRS	Approved
05/22/2008	PRS	Recommended for Approval	Consideration of PRR762 by TAC.
05/22/2008	PRS		PRS consideration of PRR762.

Date	Gov Body	Motion	Result	Against	Abstentions
06/17/2008	Board of Directors	To approve PRR762 as recommended by TAC and directed ERCOT Staff to report its impacts to the ERCOT Board 60 days after the implementation of this provision.	Passed
06/05/2008	TAC	To recommend approval of PRR762 as recommended by PRS.	Passed	7 Consumers (6) and MOU	1 IOU
05/22/2008	PRS	To grant Urgent status to PRR762. The motion passed with three opposing votes from the MOU (2) and Consumer Market Segments and four abstentions from the IREP (2), MOU and IPM Market Segments.All Market Segments were present for the votes.	Passed	3 MOU (2), Consumer	4 IREP (2), MOU, and IPM
05/22/2008	PRS	To recommend approval of PRR762 as amended by PRS.	Passed	1 Consumer	4 MOU, IPM, IREP, and IOU

Status:	Approved
Date Posted:	04/21/2008
Sponsor:	AEP
Urgent:	Yes
Sections:	6.10.6, ancillary service deployment performance conditions
Description:	The PRR revises Section 6.10.6 to exclude from consideration of performance periods where Qualified Scheduling Entities (QSEs) operating controllable units in the West zone are called upon to deploy and recall Balancing Energy in response to high wind production and Congestion in the area.
Reason:	Due to the limited transmission capability in the West zone and the abundance of uncontrollable renewable Resources, often times even coal fired generation operates on (or above) the margin and is called upon to reduce output to relieve Congestion. These instructions to reduce generation are, at times, short lived and subsequently recalled. Due to the competing and conflicting incentives of the market deployment and Scheduling Control Error (SCE) performance requirements, coal fired units can offer only a portion of their ramping capability or risk SCE performance violations. This additional exception from the SCE performance calculation will allow QSEs representing such units to make available higher amounts of ramping capability to reflect their ability to ramp down to resolve Congestion more quickly, while at the same time recognize they can not recall (re-load) the unit at the same rate. Making such additional ramping capability available should reduce the curtailments (down balancing, OOME or otherwise) necessary from other lower cost, likely wind, Resources.