Title: Counter-Party Specific Calculations for M1 Variable
Next Group:
Next Step:
Status: Approved on 08/12/2014
Effective Dates:


Date Gov Body Action Taken Next Steps
08/12/2014 BOARD Approved
06/26/2014 TAC Recommended for Approval Board for consideration
06/11/2014 PRS Recommended for Approval TAC for consideration
05/15/2014 PRS Recommended for Approval PRS for Impact Analysis review

Voting Record

Date Gov Body Motion Result
08/12/2014 BOARD To approve NPRR621 as recommended by TAC in the 6/26/14 TAC Report and as amended by the 7/23/14 ERCOT comments. Passed
06/26/2014 TAC To recommend approval of NPRR621 as recommended by PRS in the 6/11/14 PRS Report. Passed
06/11/2014 PRS To endorse and forward the 5/15/14 PRS Report and Impact Analysis for NPRR621 to TAC. Passed
05/15/2014 PRS To recommend approval of NPRR621 as revised by PRS. 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: Apr 30, 2014
Sponsor: ERCOT
Urgent: No
Description: This Nodal Protocol Revision Request (NPRR) replaces the fixed value for M1 with a calculation that will be specific to each Counter-Party. This revision defines M1 as the minimum of the existing value of 20 and the sum of two components: · M1a -- Time period required to cover any termination event · M1b -- Time period to cover Mass Transitions onlyThe M1a component is applicable to all Counter-Parties. However, the M1b component will be applicable only to Counter-Parties with Load or generation.
Reason: The existing Protocol methodology for computing Mass Transition risk does not reflect the market risk profile. The time required for Mass Transition will differ greatly depending on the number of Electric Service Identifiers (ESI IDs) held by a Counter-Party. In addition, Counter-Parties with neither Load nor Generation will not have transition risk.

Key Documents

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