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SCR733
Summary
| Title | Zonal Instructed Deviation (ZID) and Offline calculations |
|---|---|
| Next Group | |
| Next Step | |
| Status | Approved |
Action
| Date | Gov Body | Action Taken | Next steps |
|---|---|---|---|
| No updates have been made to this issue. | |||
Voting Record
| Date | Gov Body | Motion | Result |
|---|---|---|---|
| No updates have been made to this issue. | |||
Background
| Status: | Approved |
|---|---|
| Date Posted: | Mar 1, 2004 |
| Sponsor: | CenterPoint Energy |
| Urgent: | |
| Sections: | |
| Description: | Modify ERCOT™s Settlements and Billing Extract to keep the integrity of a QS€™s Real Time operational data such as deployments to the QSE from ERCOT. Include bill determinants that are used in calculating offline adjustments. |
| Reason: | Today, ERCOT uses Offline calculations to settle zonal command and control fleet instructions for OOME. This process involves ERCOT calculating an OOM Quantity and a Head Room Quantity (i.e., the amount of remaining deployable energy available) after selecting generating units that appear to have moved to follow the instruction. The OOM Quantity cannot be determined without knowing the original ZID bill determinants, zonal command, and control fleet instructions. The Head Room Quantity cannot be determined without knowing which generation units ERCOT has determined to use to follow the fleet. Changing or not providing all of the bill determinants for the command and the control fleet payments for the original ZID, makes it difficult for QSEs to validate ERCOT extracts against their internal systems and to subsettle bilateral counterparty arrangements. Currently, QSEs cannot validate (i.e., œshadow settl€?) these adjustments. Through the Settlements and Billing extract, ERCOT does provide a bill determinant for the final adjusted payment (EOOMADJ), but ERCOT does not provide one for each of the instruction volume changes to the ZID, not until fourteen (14) days later, via the Client Data Report. In addition, the quantity related to the payment of zonal command and control fleet instructions is not provided at all in either the Settlements and Billing extract or the Client Data Report. In order to accuratel“shadow seteâ€? or validate ERCOT settlement data, within the time parameters defined in the ERCOT protocols, QSEs need the information used in the Offline adjustments and separated bill determinants for each ZID instruction that will be made available through the Settlements and Billing extract. Generally, this occurs within three (3) Business Days after the trade date. |
Key Documents
Sep 28, 2005 - doc - 82.5 KB
Sep 28, 2005 - doc - 70.5 KB
Sep 28, 2005 - xls - 26.5 KB
Sep 28, 2005 - doc - 78 KB