PGRR #27 · Revision Request
PGRR027 Analysis of Subsynchronous Resonance Studies in Transmission Studies
ReasonWith the addition of multiple series compensated transmission lines to the ERCOT Transmission Grid, the ERCOT System has become vulnerable to much higher risk of SSR between series compensated lines and other Transmission Elements. Type 3 wind turbines (duel feed induction generators) are more vulnerable than most other Transmission Elements to this condition. The combination of series compensated lines and Type 3 wind turbines in the Competitive Renewable Energy Zone (CREZ) transmission zones makes procedures to protect against this reliability problem critical. This PGRR will provide for these procedures.
Created2013-02-27
Approved2013-07-16
Sections Affected
2.25.1.25.4.15.4.25.4.2.15.4.5.15.7.5
Summary
This Planning Guide Revision Request (PGRR) describes how ERCOT will act to protect the ERCOT Transmission Grid from Subsynchronous Resonance (SSR) oscillations since installation of multiple series compensated transmission lines has increased ERCOT’s vulnerability to such oscillations.
Action Log 5 milestones
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Feb 27
PLWGRecommended for Approval→ PLWG IA Review
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Mar 27
PLWGRecommended for Approval→ ROS Consideration
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Apr 11
ROSRecommended for Approval→ TAC Consideration
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May 2
TACRecommended for Approval→ ERCOT Board Consideration
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Jul 16
BOARDApproved
Amendments
| Date | Body | Motion | Result |
|---|---|---|---|
| Feb 27 '13 | PLWG | To recommend approval of PGRR027 as amended by the 2/22/13 CenterPoint Energy comments and as revised by PLWG | |
| Mar 27 '13 | PLWG | Consensus to endorse and forward the 2/27/13 PLWG Report as amended by the 3/26/13 Oncor comments and as revised by PLWG and the Impact Analysis to ROS | |
| Apr 11 '13 | ROS | To recommend approval of PGRR027 as recommended by PLWG in the 3/27/13 PLWG Report and as revised by ROS | Passed |
| Jul 16 '13 | BOARD | To approve PGRR027 as amended by the 7/2/13 TAC comments | Passed |
Documents 12
| Name | Type | Posted | Classification |
|---|---|---|---|
| 027PGRR-01 Analysis of Subsynchronous Resonance Studies in Trans | doc | Jan 15 '13 | Revision Request |
| 027PGRR-02 Impact Analysis 011513 | doc | Jan 15 '13 | Staff Report |
| 027PGRR-03 LCRA TSC Comments 012413 | doc | Jan 24 '13 | Revision Request Comments |
| 027PGRR-04 CenterPoint Energy Comments 022213 | doc | Feb 22 '13 | Revision Request Comments |
| 027PGRR-05 PLWG Report 022713 | doc | Mar 1 '13 | Committee Report |
| 027PGRR-06 Oncor Comments 032613 | doc | Mar 28 '13 | Revision Request Comments |
| 027PGRR-07 PLWG Report 032713 | doc | Apr 1 '13 | Committee Report |
| 027PGRR-08 ROS Report 041113 | doc | Apr 16 '13 | Committee Report |
| 027PGRR-09 TAC Report 050213 | doc | May 2 '13 | Committee Report |
| 027PGRR-10 OWG Comments 062513 | doc | Jun 25 '13 | Revision Request Comments |
| 027PGRR-11 TAC Comments 070213 | doc | Jul 2 '13 | Revision Request Comments |
| 027PGRR-12 Board Report 071613 | doc | Jul 17 '13 | Committee Report |
Meetings That Took It Up 7
| Date | Meeting | Committee | Status |
|---|---|---|---|
| Aug 28 '13 | Planning Working Group (PLWG) Meeting | PLWG | Concluded |
| Jul 16 '13 | Board of Directors Meeting | BOARD | Concluded |
| Jul 2 '13 | Technical Advisory Comittee (TAC) Meeting | TAC | Concluded |
| Jun 26 '13 | Planning Working Group (PLWG) Meeting | PLWG | Concluded |
| May 2 '13 | Technical Advisory Committee (TAC) Meeting | TAC | Concluded |
| Apr 11 '13 | Reliability and Operations Subcommittee (ROS) Meeting | ROS | Concluded |
| Feb 27 '13 | Planning Working Group (PLWG) Meeting | PLWG | Concluded |