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Antitrust Admonition - ERCOT strictly prohibits Market Participants and their employees who are participating in ERCOT activities from using their participation in ERCOT activities as a forum for engaging in practices or communications that violate the antitrust laws. The ERCOT Board has approved guidelines for members of ERCOT Committees, Subcommittees and Working Groups to be reviewed and followed by each Market Participant attending ERCOT meetings. If you have not received a copy of these Guidelines, copies are available at the Client Relations desk. Please remember your ongoing obligation to comply with all applicable laws, including the antitrust laws.

10:00 am

 Disclaimer - All presentations and materials submitted by Market Participants or any other Entity to ERCOT staff for this meeting are received and posted with the acknowledgement that the information will be considered public in accordance with the ERCOT Websites Content Management Operating Procedure.

2

Introductions/Welcome

3

Follow-Up Discussion from April 16, 2012 MIT meeting

o  ERCOT’s request for Market Participant’s feedback concerning expanding Time Error Correction (TEC) window-

o  ERCOT’s TEC Analysis reported during the April 16, 2012 meeting (Sandip Sharma)

o ERCOT’s recommendations for Time Error Correction (TEC) procedural changes for MIT review and discussion. 

MIT GOAL:   Based upon MIT’s review of ERCOT’s TEC documentation and taskforce discussions, MIT will develop a consensus recommendation that will be included as a voting item on the May 16, 2012 Retail Market Subcommittee (RMS) agenda.   

Current ERCOT Protocols for Time Error Corrections 

2.2.9   Time Error and Time Synchronization

2.2.9.1      Time Error

Sustained frequency deviations from scheduled frequency result in Time Error.  Time Error will be monitored and controlled in ERCOT as follows:

(a)    Time Error Monitoring - ERCOT will monitor accumulated Time Error and initiate time corrections.  The instantaneous Time Error is available to all QSEs on the MIS Public Area.  When Time Error is equal to or greater than ±3 seconds, ERCOT may initiate a time correction.  The correction may end when the error is less than ±0.5 seconds, or when system events mandate termination.  The time correction may be postponed if it is determined that load patterns in the immediate future will result in the desired time correction.

(b)    Time Error Correction - When a time correction is necessary, ERCOT will adjust scheduled frequency by arranging for more or less Resources by implementing a frequency offset.  Information will be communicated via hotline call to all QSEs, which will include the frequency offset (-.02 Hz for fast and +.02 Hz for slow) and the start time.  A time correction may be terminated after five hours, or after any hour without a 0.5 second error reduction.  ERCOT will provide adequate notice of the ending of a time correction to all QSEs in the ERCOT Region.

10:15 am

4

Are there additional Metering Issues that impact the market that the Metering Issues Taskforce (MIT) should discuss and/or work to find a market solution?

11:15 am

5

Review Open Action Items

11:30 am

6

Discuss and Schedule Follow-up meeting(s), if necessary

11:45 am

Adjourn

12:00 pm