Title: Load Resource Participation in Security-Constrained Economic Dispatch
Next Group:
Next Step:
Status: Approved on 09/17/2013
Effective Dates:


Date Gov Body Action Taken Next Steps
09/17/2013 BOARD Approved
09/05/2013 TAC Recommended for Approval ERCOT Board consideration of NPRR555
08/22/2013 PRS Recommended for Approval TAC consideration of NPRR555
07/18/2013 PRS Deferred/Tabled PRS consideration of NPRR555

Voting Record

Date Gov Body Motion Result
09/17/2013 BOARD To approve NPRR555 as recommended by TAC in the 9/5/13 TAC Report. Passed
09/05/2013 TAC To recommend approval of NPRR555 as recommended by PRS in the 8/22/13 PRS Report and as amended by the 8/29/13 ERCOT comments. Passed
08/22/2013 PRS To recommend the values for the X and Y variables relative to Base Point Deviation Charges and CLREDP as set forth in the 8/15/13 WMS comments and 8/19/13 ROS comments and that these values be subject to approval and review by TAC and be posted to the MIS. Passed
07/18/2013 PRS To grant NPRR555 Urgent status, table NPRR555 and refer the issue to ROS and WMS. Passed

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: Approved
Date Posted: Jul 3, 2013
Sponsor: ERCOT
Urgent: Yes
Sections: 2.1, 2.2, 3.2.5, 3.6, 3.6.1 (new), 3.6.2 (new),, 3.9.1,, 3.17.3, 6.3, 6.3.1, 6.4.3 (new), (new), (new), (new),,,,,,,,,,, 6.6.5,,,, (new), (new),,,,,
Description: This NPRR enables Demand response from Controllable Load Resources, as re-defined, to be Dispatched by Security-Constrained Economic Dispatch (SCED) based on a Real-Time Market (RTM) Energy Bid. This NPRR clarifies the initial rules for participation in the RTM by newly-defined "Aggregate Load Resources" (ALRs), consisting of multiple metered sites within a single ERCOT Load Zone. Controllable Load Resources, including ALRs, must be capable of responding to five-minute SCED Base Point instructions, which could instruct Load changes in either direction (up or down) if the Controllable Load Resource’s bid sets the Locational Marginal Price (LMP). The NPRR, along with associated Other Binding Documents, also establishes a long-term solution for Controllable Load Resource provision of Non-Spinning Reserve (Non-Spin) Service by allowing participating Controllable Load Resources providing Non-Spin to be Dispatched economically. Initial participation will be limited to Load Serving Entity (LSE) QSEs (the only QSEs that can submit bids to buy energy) and Controllable Load Resources capable of responding to five-minute SCED Base Points. Future enhancements to the market will be necessary to accommodate direct participation by third-party Demand response aggregators and Load Resources with "block" offers or bids. Additionally, as drafted, NPRR555 will not accommodate Load Resources with ramp periods longer than five minutes, nor will it accommodate the provision of Ancillary Services by Controllable Load Resources with temporal constraints such as minimum or maximum run times. As submitted, the NPRR proposes uniform performance and compliance metrics for any Load Resource participating in SCED; however, ERCOT encourages Market Participants to consider whether establishing more relaxed metrics for Load Resources that are not carrying an Ancillary Service Resource Responsibility would attract more participation.
Reason: ERCOT has authored this NPRR as way of contributing to ongoing efforts by policymakers and Market Participants to help limit Real-Time price reversal when actions are taken by ERCOT for reliability purposes (in this case, deployment of Load Resources providing Non-Spin).

Key Documents

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