AMS Indicator ERCOT Recommendations

ERCOT3/9/2011

2 MCT/TX SET3/9/2011

Current AMS indicator

The original AMS indicator project as mandated by the PUC describes the flag as:

PUCT Project 37291:

  SETTLEMENT PROVISIONED METER: An advanced meter as defined in P.U.C. Subst. R. 25.130, Advanced Metering, that has been deployed by the Company, and for which 15-minute interval data is sent to and accepted by ERCOT for settlement purposes.

ERCOT’s recommendation:• Do not change the current indicator, leave as ‘true/false’ and based solely on

the load profile assigned in the settlement system• Create an additional indicator to define the type of AMS meter that is currently

installed at a premise (AMSR, AMSM) or that there is not an AMS meter installed (N)

• New indicator would be added to existing extracts and reports in addition to displaying the AMS indicator as it exists today

3 MCT/TX SET3/9/2011

Initial Population File

ERCOT’s recommendation :

• Each TDSP will provide a list ESIIDs where AMS meters are installed.

• The TDSPs will provide the value for the indicator (AMSR or AMSM).

• ERCOT will populate those values into its system and provide a list of all remaining ESIIDs that were not updated as a part of the effort.

• ERCOT will provide the TDSP a list of all ESIIDs to be populated with the ‘N’ value and will require verification back from the TDSP that they agree with the designation assignment.

• Upon approval by the TDSP, ERCOT will use the list to populate the remaining ESIIDs.

4 MCT/TX SET3/9/2011

Daily Operation after initial population

814_20 Create transactions will require the REF~MR in the LIN loop to be populated with either AMSR, AMSM or N to ensure initial population.

– ERCOT will not assume a designation based on a null value

814_20 Maintain transactions will require the new REF~MR segment in the LIN loop in to be populated when REFMR is provided in the REF~TD which will indicate the AMS Indicator needs to be updated. The TDSP does not need to include the REF~MR in the 814_20 maintain unless a change is required to the AMS indicator

Instances which would require alteration of initial designation:

1. IDR threshold values have been met, requiring the installation of an IDR meter.2. Inadvertent assignment to AMS value when ESIID did not have an AMS meter.

Other Considerations:

814_04, 814_05, 814_14 and 814_22 should be reviewed to incorporate the ‘N’ indicator as well, since they contain the same REF~MR segment