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March 13, 2009 RPG Meeting ERCOT RMR Study for Luminant NSO Jeff Billo.

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Presentation on theme: "March 13, 2009 RPG Meeting ERCOT RMR Study for Luminant NSO Jeff Billo."— Presentation transcript:

1 March 13, 2009 RPG Meeting ERCOT RMR Study for Luminant NSO Jeff Billo

2 2 RPG MeetingMarch 13, 2009 Luminant – Notice of Suspension of Operations On February 5, 2009 Luminant submitted Notice of Suspension of Operations (NSO) for:

3 3 RPG MeetingMarch 13, 2009 Luminant – Notice of Suspension of Operations The units were grouped and analyzed in two group based on the proposed suspension dates –Group 1: May 2009 –Group 2: September 2009 Analysis was done to determine if absence of the units violated any planning criteria as outlined in the Operating Guides –Transfer study performed using MUST –Voltage Stability study performed using VSAT Study results were reviewed and verified by Operations Staff

4 4 RPG MeetingMarch 13, 2009 Luminant – Notice of Suspension of Operations The following study assumptions were used: –2009 summer peak case (SSWG DSA December 2008 Update) used for Group 1 units All Group 1 units turned off All Group 2 units were available (unless otherwise specified) All wind generation was turned off –2010 summer peak case (SSWG DSB December 2008 Update) used for Group 2 units All Group 1 and 2 units were turned off All wind generation was turned off –For each unit a second scenario was modeled where a nearby unit was modeled as unavailable; for some units a third scenario was modeled where a different nearby unit was modeled as unavailable [to meet Operating Guide 5 requirements]

5 5 RPG MeetingMarch 13, 2009 Luminant – Notice of Suspension of Operations Justification for turning off wind generation in RMR analysis using 2008 wind data –348 hours when wind generation was less than 10% of installed capacity (roughly one hour each day) –179 hours when all wind generation in ERCOT was less than 30 MW total (roughly one hour every 2 days) –55 hours when all wind generation in ERCOT was less than 10 MW (roughly one hour each week) –1 hour when all wind generation in ERCOT was 0 MW

6 6 RPG MeetingMarch 13, 2009 Luminant – Notice of Suspension of Operations Permian Basin 5 Results –With a nearby unavailable the following constraints could not be resolved: Transfer Limit (MW) Limiting ElementLimiting Contingencies -483 Odessa (138/345) kV Auto-transformer – 1 Odessa (138/345) kV Auto-transformer – Ackerly Vealmoor – Ackerly 69 kV Line Sharon Ridge – Bluff Creek 138 kV Line

7 7 RPG MeetingMarch 13, 2009 Luminant – Notice of Suspension of Operations Permian Basin 6 Results –The following constraints could not be resolved: Transfer Limit (MW) Limiting ElementLimiting Contingencies ODESEHV_ ODESEHV_ ODESEHV_ ODESEHV_ ODESEHV_ ODESEHV_ ODESEHV_ ODESEHV_ 345 1

8 8 RPG MeetingMarch 13, 2009 Luminant – Notice of Suspension of Operations Permian Basin 6 Results –With a nearby unit unavailable the following constraints could not be resolved: Transfer Limit (MW) Limiting ElementLimiting Contingencies ACKRLYVE ACKERLY_ EXSHARNR BLUFCKTA ACKERLY_ ACKRLNTC EXSHARNR BLUFCKTA ACKRLYVE ACKERLY_ EXSHARNR WILLOWVA ACKRLYVE ACKERLY_ GAILLYNT WILLOWVA ACKERLY_ ACKRLNTC EXSHARNR WILLOWVA ACKERLY_ ACKRLNTC GAILLYNT WILLOWVA ACKRLNTC SPARNBRG EXSHARNR BLUFCKTA LAMESA_ SPARNBRG EXSHARNR BLUFCKTA ODESEHV_ ODESEHV_ ODESEHV_ ODESEHV_ ODESEHV_ ODESEHV_ ODESEHV_ ODESEHV_ OLFNNSHL NYLONTAP HUNTSMAN REXALL_ BIGSPRIG BIGSPGWE ODESEHV_ QUAILSW_ MRGNCRK_ LONGSHOR 345 1

9 9 RPG MeetingMarch 13, 2009 Luminant – Notice of Suspension of Operations Decordova Results –With a nearby unit unavailable the following constraints could not be resolved: Transfer Limit (MW) Limiting ElementLimiting Contingencies WATMLL_W TRINDAD Limestone 345 kV to Water Mill 345 kV 1 Limestone 345 kV to Water Mill 345 kV BIGBRN__ JEWETT_N Limestone 345 kV to Water Mill 345 kV 1 Limestone 345 kV to Water Mill 345 kV TRICRN1_ TRINDAD Limestone 345 kV to Water Mill 345 kV 1 Limestone 345 kV to Water Mill 345 kV CHILSW1_ WATMLL_E WLEVEE1_ WATMLL_ WATMLL_W SARGT1_ WATMLL_W WATMLL_ VENUS_S BIGBRN__ Limestone 345 kV to Water Mill 345 kV 1 Limestone 345 kV to Water Mill 345 kV 2

10 10 RPG MeetingMarch 13, 2009 Luminant – Notice of Suspension of Operations Further analysis is being done to determine if Permian Basin 5, Permian Basin 6, and Decordova are needed as Reliability Must Run (RMR) units. –Uplan analysis being performed to determine if security constrained dispatch is possible –Working with Oncor to verify results and possibly determine if RAPs or SPSs can be developed to resolve constraints Initial analysis determined that all other units proposed in the NSO did not qualify for RMR status.

11 11 RPG MeetingMarch 13, 2009 Questions?


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