Project 2022-01 Reporting ACE Definition and Associated Terms

​​​​​​​​​​​​​Related Files

The formal comment period and ballots for the Project 2022-01 Reporting ACE Definition and As​sociated Terms ​concluded 8 p.m. Eastern, Monday, October 30, 2023. The comments received and ballot resutls can be accessed via the links below. The drafting team will review all responses received during the comment period and determine the next steps of the project.

The SAR states that the current definition of Reporting Area Control Error (ACE) presents a conflict with the Western Interconnection's Automatic Time Error Correction (ATEC) process and does not allow other Interconnections to pursue ATEC. Additionally, there is confusion in that the terms ACE and Reporting ACE are both used throughout the standards. A revised definition should provide improve long-term average frequency performance as well as give other Interconnections the ability to pursue automatic correction approaches.

Standard(s) Affected: Multiple standards reference the Reporting ACE definition, including BAL.




Consideration of Comments

​Draft 2

Inadvertent Interchange Management – (IIM)
Reporting Area Control Error – (Reporting ACE)
Clean | Redline

Draft 1
ACE Diversity Interchange (ADI)
Clean | Redline

Supporting Materials
Unofficial Comment Form (Word)

Initial and Additional Ballots

Ballot Open Reminder​



10/20/23 - 10/30/23​

​Ballot Results

​Join Ballot Pool
​09/14/23 - 10/13/23

​Comment Period


Submit Comments​

09/14/23 - 10/30/23​


​Reporting ACE Definition Master List

Supporting Materials

Unofficial Comment Form (Word)

Initial Ballots

Ballot Open Reminder​



03/07/23 - 03/16/23

​​Ballot Results

New - Inadvertent Interchange Management (IIM)​

Modified - Actual Net Interchange (NIA)​

Modified - Area Control Error (ACE)​

Modified - Automatic Time Error Correction (ATEC)

Modified - Balancing Authority Area (BAA)

Modified - Balancing Contingency Event (BCE)

Modified - Control Performance Standard (CPS)​

Modified - Disturbance

Modified - Dynamic Interchange Schedule or Dynamic Schedule

Modified - Frequency Bias Setting (FBS)

Modified - Frequency Error​

Modified - Implemented Interchange

Modified - Inadvertent Interchange

Modified - Interchange Meter Error (IME)

Modified - Operating Reserve – Spinning

Modified - Operating Reserve – Supplemental

Modified - Overlap Regulation Service

Modified - Pseudo-Tie

Modified - Ramp Rate or Ramp

Modified - Regulation Service​

Modified - Reportable Balancing Contingency Event (RBCE)

Modified - Reporting Area Control Error (Reporting ACE)

Modified - Reserve Sharing Group (RSG)

Modified - Reserve Sharing Group Reporting ACE

Modified - Scheduled Frequency

Modified - Scheduled Net Interchange (NIS)

Modified - Supplemental Regulation Service

Modified - Tie Line Bias (TLB)

Modified - Time Error (TE)

Modified - Time Error Correction (TEC)

Retirement - Disturbance Control Standard

Retirement - Net Actual Interchange

Retirement - Net Interchange Schedule

Retirement - Net Scheduled Interchange

Retirement - Reportable Disturbance

Implementation Plan​​


​Join Ballot Pools
Note: There is a separate ballot for each of the definitions and implementation plan related to this project – a total of 36. It is necessary to join each ballot pool in order to submit votes on all of the definitions and implementation plan

​01/31/23 - 03/01/23

​Comment Period


Submit Comments

01/31/23 - 03/16/23​​

The Standards Committee accepted the SAR on June 15, 2022

Drafting Team Nominations

Supporting Materials

Unofficial Nomination Form (Word)

Nomination Period


Submit Nominations​

​​02/09/22 - 03/10/22

Standard Authorization Request

Supporting Materials

Unofficial Comment Form (Word)

Comment Period


Submit Comments

02/09/22 - 03/10/22