PRR703

Title:	Emergency Interruptible Load Service (EILS)
Next Group:	TAC
Next Step:	PRS Chair to notify TAC
Status:	Rejected on 12/13/2007
Related Issue:	Emergency Interruptible Load Service

Date	Gov Body	Next Steps
12/13/2007	PRS	Rejected	PRS Chair to notify TAC
01/22/2007	PRS		Response to PRS request by WMS, ROS and ERCOT Staff
01/22/2007	PRS		Consideration at the January 18, 2007 PRS meeting.

Date	Gov Body	Motion	Result	Against	Abstentions
12/13/2007	PRS	To reject this PRR.	Passed	0	0
01/22/2007	PRS	That PRS concurs with ERCOT that curtailing voluntary firm Load in emergency conditions is preferable to shedding firm Load on an involuntary basis. However, PRS is not yet convinced that such a program is appropriate for two reasons: 1. The market has changed since April 17, 2006; 2. Whether it can be implemented for a cost commensurate with the value of lost load (VOLL) associated with rotating outages during emergency conditions. Therefore, at this time, PRS declines to recommend approval or rejection of any PRRs related to EILS until questions related to the need and efficacy of such a service are more firmly established. PRS therefore tables PRR702, PRR703, PRR704, and PRR705 until the February 22, 2007 PRS meeting. PRS requests that the Reliability Operations Subcommittee (ROS) address the following questions and report back to PRS on February 22, 2007: 1. What is the statistical likelihood, given ERCOT Operator flexibility in the EECP process, that EILS will be utilized as envisioned prior to firm Load shedding? 2. Rate the impact of each of the EILS PRRs on ERCOT’s loss of Load probability (LOLP). 3. Evaluate the EILS PRRs procurement methodology. What is the appropriate amount of EILS to procure, if any? 4. Evaluate the EILS PRRs deployment methodology. Address any concerns that arise from deployment and recall: i.e., should EILS be deployed as a single block; is geographic concentration of EILS providers an issue during EECP; what are the effects of transmission system limitations; etc.? 5. What other alternatives to EILS, such as procuring additional existing Ancillary Services, could be utilized to achieve similar results? PRS requests that ERCOT Staff address the following questions and report to PRS on February 22, 2007: 1. What is the statistical likelihood, given ERCOT Operator flexibility in the EECP process, that EILS will be utilized as envisioned prior to firm Load shedding? 2. Rate the impact of each of the EILS PRRs on ERCOT’s LOLP. 3. What alternatives to EILS were examined by ERCOT, if any, and why was EILS pursued instead of those other options? Has the VOLL been determined for the April 17, 2006 Load shedding event? If so, please share the methodology and results of that study. If not, why not? PRS requests that WMS define the following and report to PRS on February 22, 2007: 1) The benefit. 2) The cost based on the EILS PRRs. 3) Changes in Market since April 17, 2007.	Passed	0	2 Consumers

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.

Status:	Rejected
Date Posted:	12/28/2006
Sponsor:	Emergency Interruptible Load Task Force
Urgent:	Yes
Sections:	Section 2, Definitions and Acronyms; Section 4.1.1, Day Ahead Scheduling Process; Section 4.1.3, Month Ahead Scheduling Process (New); Section 4.4.8, Submittal of Day Ahead Schedules and Ancillary Services Schedules; Section 4.11, Month Ahead Scheduling Process (New); Section 5.6.7, EECP Steps; Section 5.6.8, Emergency Compensation; Section 5.8.3.1, Data Collection; Section 6.1.13, Emergency Interruptible Load Service (EILS) (New); Section 6.2.1, Ancillary Services Solely by ERCOT; Section 6.5.1.1, Requirement for Operating Period Data for System Reliability and Ancillary Service Provision; Section 6.5.12, Emergency Interruptible Load Service (EILS) (New); Section 6.6.2, Competitive Procurement of Ancillary Service Resources by ERCOT; Section 6.7.9, Deployment and Recall of EILS (New); Section 6.10.2, General Capacity Testing Requirements; Section 6.11, (Emergency Interruptible Load Service Qualification, Testing and Performance Standards (New); Section 12.4.2, Ancillary Service – Related Information; and Section 16.2, Registration of Generation Resources and Loads Acting as a Resource.
Description:	This PRR changes the Protocols Sections noted above and institutes an Emergency Interruptible Load Service (EILS) as a load interruption emergency backstop for use only during Emergency Electric Curtailment Plan (EECP) Step 3. EILS would be a merit order of loads that have voluntarily offered to interrupt at an offer price and would be dispatched to interrupt in the EECP step just prior to the Independent System Operator’s (ISO) dispatch order to Transmission and Distribution Service Provider/Distribution Service Providers (TDSP/DSPs) to shed firm load in order to preserve the system’s frequency.
Reason:	In September 2006, ERCOT proposed the creation of an emergency interruptible load product incorporated into the EECP as an additional tool to manage system frequency and avoid firm load shedding.