Title: Ancillary Service Deployment Clarification
Next Group:
Next Step:
Status: Approved on 10/20/2009
Effective Dates:

or per the Nodal Protocol Transition Plan http://www.ercot.com/mktrules/protocols (11/01/09 Nodal Protocols Library)


Date Gov Body Action Taken Next Steps
09/17/2009 PRS Recommended for Approval TAC consideration of NPRR189
08/25/2009 PRS Recommended for Approval PRS Impact Analysis review
10/20/2009 BOARD Approved
10/01/2009 TAC Recommended for Approval ERCOT Board consideration of NPRR189.

Voting Record

Date Gov Body Motion Result
09/17/2009 PRS To endorse and forward the 8/25/09 PRS Recommendation Report, as amended by the 9/17/09 ERCOT comments, and Impact Analysis for NPRR189 to TAC. Passed
08/25/2009 PRS To recommend approval of NPRR189 as submitted. Passed
10/20/2009 BOARD To approve NPRR189 as recommended by TAC in the 10/1/09 TAC Recommendation Report. Passed
10/01/2009 TAC To recommend approval of NPRR189 as recommended by PRS in the 9/17/09 PRS Recommendation Report. 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 24, 2009
Sponsor: ERCOT
Urgent: No
Description: This Nodal Protocol Revision Request (NPRR) clarifies the difference between Ancillary Service capacity deployment and energy deployment and how it affects Security-Constrained Economic Dispatch (SCED). This NPRR also proposes non-substantive administrative changes, such as correcting acronym and defined term usage and section references.
Reason: This NPRR is needed to provide more clarity and make the Nodal Protocols consistent with Energy Management System (EMS)/Market Management System (MMS) whitepaper and current MMS implementation.

Key Documents

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