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NOTICE DATE:  April 19, 2017

NOTICE TYPE:  M-A041917-01 Operations

SHORT DESCRIPTION:  Implementation of Revised ERCOT Fast Responding Regulation Service (FRRS) Parameters


DAY AFFECTED:  April 25, 2017

LONG DESCRIPTION: On April 25, 2017 ERCOT will implement changes to the FRRS Deployment parameters. Changes will include increasing the Max Deployment Time from 60 seconds to 90 seconds and adjusting the Deployment Band Trigger Frequencies by 5 mHz. The trigger frequencies effective April 25, 2017 are shown in Table 1.


High Frequency Trigger

(Greater Than)

Low  Frequency Trigger

(Less Than)

Band I



Band II



Band III



Table 1: New Deployment Band Trigger Frequencies

These changes are designed to align the amount of deployments and length of deployments proportionally with the current frequency profile.   Parameters for FRRS deployment are subject to change based on ERCOT's frequency control performance and system needs.   A Market Notice will be issued prior to implementing the parameter changes.

ADDITIONAL INFORMATION:  Questions regarding these changes can be directed to ERCOT Operations Planning.

CONTACT:  If you have other questions, please contact your ERCOT Account Manager. You may also call the general ERCOT Client Services phone number at (512) 248-3900 or contact ERCOT Client Services via email at [log in to unmask].

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