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PGRR025
Summary
| Title | Addition of Criteria for Autotransformer Unavailability |
|---|---|
| Next Group | |
| Next Step | |
| Status | Approved |
| Effective Dates |
06/01/2013
|
Action
| Date | Gov Body | Action Taken | Next Steps |
|---|---|---|---|
| 05/14/2013 | BOARD | Recommended for Approval | |
| 03/07/2013 | TAC | Recommended for Approval | ERCOT Board Consideration |
| 02/14/2013 | ROS | Recommended for Approval | TAC Consideration |
| 01/23/2013 | PLWG | Recommended for Approval | ROS Consideration |
| 12/04/2012 | PLWG | Recommended for Approval | PLWG IA Review |
Voting Record
| Date | Gov Body | Motion | Result |
|---|---|---|---|
| 05/14/2013 | BOARD | To approve PGRR025 as recommended by TAC in the 3/7/13 TAC Report | Passed |
| 03/07/2013 | TAC | To recommend approval of PGRR025 as recommended by ROS in the 2/14/13 ROS Report | Passed |
| 02/14/2013 | ROS | To recommend approval of PGRR025 as recommended by PLWG in the 1/23/13 PLWG Report | Passed |
| 01/23/2013 | PLWG | To endorse and forward the 12/4/12 PLWG Report and Impact Analysis for PGRR025 to ROS | |
| 12/04/2012 | PLWG | Consensus to recommend approval of PGRR025 as submitted |
Background
| Status: | Approved |
|---|---|
| Date Posted: | Nov 2, 2012 |
| Sponsor: | PLWG |
| Urgent: | No |
| Sections: | 4.1.1.2 |
| Description: | This Planning Guide Revision Request (PGRR) adds testing and performance requirements to the ERCOT reliability criteria for the unavailability of any 345/138 kV autotransformer. |
| Reason: | At its 9/13/12 meeting, ROS directed the Planning Working Group (PLWG) to modify the ERCOT planning criteria to add ERCOT System performance testing associated with the unavailability of an autotransformer. High voltage autotransformers are typically known to have long lead delivery times ranging anywhere between one year to two years. The outage and subsequent long-term unavailability of autotransformers can impact ERCOT System reliability and needs to be accounted for in planning studies. The proposed North American Electric Reliability Corporation (NERC) Reliability Standard TPL-001-2, Transmission System Planning Performance Requirements, R.2.1, 2.1.5 requires Entities to assess the impact of the possible unavailability of major transmission equipment having a lead time of one year or more (such as a transformer) on system performance. Proposed performance testing requirements are limited to paragraphs (1)(c) and 1(d) and line 3 of Table 1, ERCOT-specific Reliability Performance Criteria, of Section 4.1.1.2. |
Key Documents
Nov 2, 2012 - doc - 71.5 KB
Dec 7, 2012 - doc - 76 KB
Jan 16, 2013 - doc - 54 KB
Jan 24, 2013 - doc - 77.5 KB
Feb 19, 2013 - doc - 81 KB
Mar 8, 2013 - doc - 84.5 KB
May 15, 2013 - doc - 84.5 KB