Title: Resource Limit Calculator
Next Group:
Next Step:
Status: Approved on 07/15/2008
Effective Dates:

or per the Nodal Protocol Transition Plan http://www.ercot.com/mktrules/protocols (08/01/08 Nodal Protocols Library)


Date Gov Body Action Taken Next Steps
06/26/2008 TAC Recommended for Approval ERCOT Board consideration
06/19/2008 PRS Recommended for Approval Consideration of NPRR119 by TAC
07/15/2008 BOARD Approved
05/22/2008 PRS Recommended for Approval Review of Impact Analysis and Recommendation Report.
04/18/2008 PRS Referred Review by the TPTF.

Voting Record

Date Gov Body Motion Result
06/26/2008 TAC To recommend approval of NPRR119 as recommended by PRS. Passed
06/19/2008 PRS To endorse the Impact Analysis and Recommendation Report for NPRR119, and forward the documents to TAC. Passed
07/15/2008 BOARD To approve NPRR119 as recommended by TAC. Passed
05/22/2008 PRS To recommend approval of NPRR119 as submitted. Passed
04/18/2008 PRS To refer NPRR119 to TPTF. 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: Mar 27, 2008
Sponsor: ERCOT Staff
Urgent: No
Sections:, Resource Limit Calculator
Description: This Nodal Protocol Revision Request (NPRR) changes the Low Dispatch Limit (LDL) calculation to ensure that the LDL and High Dispatch Limit (HDL) limit sent to the Security Constrained Economic Dispatch (SCED) do not exceed the High Sustained Limit (HSL) under any circumstance.
Reason: When the output MW of a Resource exceeds its telemetered HSL for a short time (e.g. governor response) SCED will attempt to dispatch the Resource above its HSL. Modifying the LDL calculation with a final check will ensure that the LDL and HDL limits calculated by the Resource Limit Calculator (RLC) and sent to SCED do not exceed the HSL under any circumstance.

Key Documents

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