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NPRR188
Summary
| Title | MVA for SCED Input |
|---|---|
| Next Group | |
| Next Step | |
| Status | Approved on 09/15/2009 |
| Effective Dates |
12/01/2010
or per the Nodal Protocol Transition Plan http://www.ercot.com/mktrules/protocols (10/01/09 Nodal Protocols Library) |
Action
| Date | Gov Body | Action Taken | Next steps |
|---|---|---|---|
| 07/23/2009 | PRS | Recommended for Approval | PRS Impact Analysis Review |
| 09/03/2009 | TAC | Recommended for Approval | ERCOT Board Consideration |
| 08/25/2009 | PRS | Recommended for Approval | TAC Consideration |
| 09/15/2009 | BOARD | Approved |
Voting Record
| Date | Gov Body | Motion | Result |
|---|---|---|---|
| 07/23/2009 | PRS | To recommend approval of NPRR188 as submitted. | Passed |
| 09/03/2009 | TAC | Passed | |
| 08/25/2009 | PRS | To endorse and forward the 7/23/09 PRS Recommendation Report and Impact Analysis for NPRR188 to TAC | Passed |
| 09/15/2009 | BOARD | To approve NPRR188 as recommended by TAC in the 9/3/09 TAC Recommendation Report | Passed |
Background
| Status: | Approved |
|---|---|
| Date Posted: | Jul 10, 2009 |
| Sponsor: | Ebby John on behalf of the Network Data Support Working Group (NDSWG) |
| Urgent: | No |
| Sections: | 6.5.7.1.13 |
| Description: | This Nodal Protocol Revision Request (NPRR) removes the Transmission Service Provider (TSP) requirement to provide MVA to be used in Real-Time sequence and Security-Constrained Economic Dispatch (SCED). This NPRR also corrects the use of Common Information Model (CIM) and corrects the Dynamic Rating requirement. |
| Reason: | MVA values from a TSP or any Market Participant are not used within State Estimator solutions except in the case of a Dynamic Rating. The ERCOT Energy Management System (EMS) is not designed to accept MVA values for equipment except as a Dynamic Rating. The ERCOT State Estimator, and subsequently contingency analysis, utilizes MW and Mega Volt-Amperes reactive (MVAr) Inter-Control Center Communications Protocol (ICCP) data to determine an MVA value which then may be passed to SCED if needed. The State Estimator/contingency analysis-determined MVA value is used to compare with the Market Participant provided ratings, including Dynamic Ratings, and is captured as a Real-Time sequence and SCED requirement pursuant to paragraph (1) (b) of Section 6.5.7.1.13. This NPRR also replaces CIM with Network Operations Model as Common Information Model (CIM) is a format. All MVA ratings are provided and are utilized by ERCOT in maintaining the reliability of the ERCOT Transmission Grid. |
Key Documents
Jul 10, 2009 - doc - 84.5 KB
Jul 10, 2009 - doc - 144 KB
Jul 22, 2009 - doc - 530 KB
Jul 22, 2009 - doc - 51 KB
Jul 24, 2009 - doc - 95 KB
Aug 20, 2009 - doc - 46.5 KB
Aug 27, 2009 - doc - 83.5 KB
Sep 3, 2009 - doc - 86.5 KB
Sep 16, 2009 - doc - 87 KB