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Entergy Gulf States, Inc. (Texas) Proposed Transmission Reliability Projects

Entergy Gulf States, Inc. (Texas) Proposed Transmission Reliability Projects. Entergy Transmission Planning Summit New Orleans, LA July 31, 2007. CROCKETT. RECONFIGURE 345kV BUS. 345kV. INSTALL 345kV BREAKER. AUTO #1. FRONTIER. 138kV. AUTO #2. INSTALL 138kV BREAKER.

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Entergy Gulf States, Inc. (Texas) Proposed Transmission Reliability Projects

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  1. Entergy Gulf States, Inc.(Texas)Proposed Transmission Reliability Projects Entergy Transmission Planning Summit New Orleans, LA July 31, 2007

  2. CROCKETT RECONFIGURE 345kV BUS 345kV INSTALL 345kV BREAKER AUTO #1 FRONTIER 138kV AUTO #2 INSTALL 138kV BREAKER 2007 EGSI-TX Completed Transmission Projects Grimes 345/138 kV Substation Reconfiguration

  3. Kolbs Hanks 2007 EGSI-TX Completed Transmission Projects Hanks and Kolbs 230 kV Upgrades

  4. 2007-08 EGSI-TX Proposed Transmission Reliability Projects 69kV Calvert Expand Cap Bank Replace Fawil 138/69 kV Autotransformer Calvert Fawil Cow & Orange Helbig & West End S. Beaumont, Dupont & Pt. Neches EGSI-TX Underrated Breaker Replacement 69kV Blue Water Add Cap Bank Blue Water

  5. EGSI-TX Breaker Upgrades Scenario: • Based on asymmetrical fault current analysis, various circuit breakers have been identified as underrated. Recommended Solution: • Replace the identified underrated circuit breakers with appropriately sized breakers. • 2007 • Cow 69kV #5515, #5510 • Orange 69kV #3165, 3145 • 2008 • Orange 69kV #3365 • South Beaumont 69kV #3700 • Port Neches 138kV #3345 • 2009 • Dupont Bulk 69kV #3255, #3260 • Helbig 69kV #5585 • Orange 69kV #3370 • Estimated cost: $2.7 MM

  6. EGSI-TX 69kV Voltage Support Calvert 69kV Substation • Loss of 69kV Line 159 (Bryan – APL Hearne) causes undervoltages at Calvert 69kV Substation. • Expand existing capacitor bank to 12MVAr • Proposed In-Service Date: 2008 • Approximate Cost: $600 k Blue Water 69kV Substation • Multiple contingencies cause undervoltages on 69kV Line 175 “Beach Line.” • Install 11MVAr capacitor bank • Proposed In-Service Date: 2008 • Estimated Cost: $500 k

  7. EGSI-TX 69kV Voltage Support EXPAND EXISTING CAP BANK INSTALL 11MVAR CAP BANK

  8. Fawil: Replace 138/69 kV Autotransformer Scenario: • Contingency events along 69 kV Line 81 (Fawil-Deweyville-Echo) cause loads on Line 81 to be served radially through the Fawil 138/69 kV autotransformer, resulting in overloads on the transformer during peak load conditions. The transformer is currently rated at 20 MVA. Recommended Solution: • Replace the autotransformer with a system spare 138/69 kV, 45 MVA unit, located at Meaux substation in Louisiana. • Proposed In-Service Date: 2008 Estimated Cost: $350 k

  9. Fawil: Replace 138/69 kV Autotransformer

  10. 2009-10 EGSI-TX Proposed Transmission Reliability Projects Cedar Hill Porter 138kV Line 823/886 Upgrade S. Beaumont 69kV Beaumont Upgrades Yankee Doodle, 69kV Line 876 & Line 98

  11. 69 kV Beaumont Network Upgrades Scenario: • In the 69kV Beaumont area there exists several single contingency thermal overloads including: • 69kV Line 581 (Helbig – Rosedale) • 69kV Line 468 (Elizabeth – Gallier) • 230/69kV Helbig Autotransformers • 69kV Bus Tie Breakers (Helbig & Amelia) Recommended Solution: • Add line breakers at Yankee Doodle 69kV Substation. • Close normally open points at Lincoln and Crockett 69kV Substations. • Rebuild 69kV Line 576 (Lincoln – South Beaumont) & 69kV Line 98/190 (Dupont Beaumont – South Beaumont) to 106MVA capacity. • Approximately 5.5 miles of 69kV transmission lines • Proposed In-Service Date: 2009 Estimated Cost: $8 MM

  12. 69 kV Beaumont Network Upgrades CROCKETT CLOSE N.O. BREAKER CLOSE N.O. SWITCH YANKEE DOODLE L-155 VIRGINIA LINCOLN L-458 CARDINAL ADD LINE BREAKERS UPGRADE LINE 576 L-458 UPGRADE LINE 190 LAMAR CDT NITRO DUPONT BEAUMONT SOUTH BEAUMONT BULK UPGRADE LINE 98

  13. 138 kV Line 823/886(Porter – Tamina – Cedar Hill) Upgrade Scenario: • 138 kV Line 823/886 (Porter – Tamina - Cedar Hill) is one of the primary sources into the Montgomery County load pocket. • The single contingency loss of 138 kV Line 582 (Oak Ridge - Porter) causes 6.3% thermal overloads on 138 kV Line 823/886 (Porter to Cedar Hill). Recommended Solution: • Re-conductor approximately 6 miles of 138kV Line 886 (Tamina – Cedar Hill) to 531 MVA capacity. • Upgrade station equipment at Tamina to bring rating of Line 823 Porter-Tamina up to 531 MVA capacity. • Proposed In-Service Date: 2009 Estimated Cost: $7.4 MM

  14. 138kV Line 823/886(Porter – Tamina – Cedar Hill) Upgrade UPGRADE TO 531MVA CAPACITY

  15. 2011-12 EGSI-TX Proposed Transmission Reliability Projects Western Region Reliability Improvement Plan - Phase 3A Rivtrin Quarry Huntsville Grimes Cypress Lewis Creek Jacinto Hartburg Inland Orange Western Region Reliability Improvement Plan - Phase 3 230kV Line 195 Upgrade

  16. Western Region ReliabilityImprovement Plan Phase 3 * • Convert 138 kV Lines 524/824 (Jacinto-Lewis Creek) to 230 kV operation. • Construct a 230 kV transmission line from Cypress to Jacinto. • Install static and dynamic VAR support in the Western Region. • Projected In-Service Date: 2011 Phase 3A (Alternative to Phase 3) • Construct new Quarry 345 kV Substation on Line 119. • Construct a new 345 kV transmission line from Quarry to Rivtrin. • Upgrade 138 kV transmission Line 485 (Grimes to Huntsville). • Additional firm network resources • Projected In-Service Date: 2011 Phase 4 (Projected ISD – 2013) * • Build new 230 kV line from Porter to Lewis Creek. * Note: This set of projects may be modified based on further activities and developments occurring at the Louisiana and Texas Commissions.

  17. Western Region Reliability Improvement Plan Phase 3

  18. QUARRY Western Region Reliability Improvement Plan - Phase 3A • Projects identified in Phases 3 and 4 of the WRRIP result in greater reliance on and strengthening of the transmission corridor between the Western Region and the Beaumont area. • Because of recent events such as the isolation of the Western Region from the rest of the Entergy System, the Company has developed Phase 3A, which would strengthen the Western Region’s ties to the west.

  19. 230 kV Line 195 (Hartburg-Inland Orange) Upgrade Scenario: • 230 kV Line 195 (Hartburg – Inland Orange) is one of the primary sources into the Beaumont/Port Arthur area. • The single contingency loss of 500 kV Line 547 (Cypress – Hartburg) causes thermal overloads on Line 195. Recommended Solution: • Re-conductor approximately 4 miles of 230kV Line 195 (Hartburg – Inland Orange) to 1042 MVA capacity. • Projected In-Service Date: 2012

  20. 230 kV Line 195 (Hartburg-Inland Orange) Upgrade

  21. Long Term Reliability Target Areas (2013 – 2017) • The following transmission lines experience thermal overloads for various contingencies in the 2013 - 2017 time frame. • 230 kV Line 496 (China – Sabine) • For the loss of Line 599 (China – Amelia) • 138 kV Line 88 (Dayton – Cheek) • For the loss of Line 496 (China – Sabine) • 138 kV Line 571 (Jacinto – Porter) • For the loss of Line 822 (China – Porter) • 138 kV Line 150 (Dayton – Long John) • For the loss of Line 579 (Jacinto – Cleveland) • 138 kV Line 561 (Gulfrich – Crown Orange) • For the loss of Line 590 (Gulfrich – Ausimont) • 138 kV Line 582 (Oak Ridge – Porter) • For the loss of Line 886 (Tamina – Porter) • 138 kV Line 86 (Dayton – Eastgate) • For the loss of Line 882 (China – Porter) • 138 kV Line 515 (Sabine – Port Neches) • For the loss of Line 516 (Sabine – Port Neches) • 138 kV Line 516 (Sabine – Port Neches) • For the loss of Line 515 (Sabine – Port Neches) • 230 kV Line 195 (Helbig – Inland Orange) • For the loss of Line 547 (Cypress – Hartburg) • The following substations experience under-voltages for various contingencies in the 2013 – 2017 time frame. • Lacon 138 kV Substation

  22. Long Term Reliability Target Areas (2013 – 2017) 230 kV Line 195 (Helbig – Inland Orange) 138 kV Line 150 (Dayton – New Long John) 230 kV Lines 515 & 516 (Sabine – Port Neches) 138 kV Line 86 (Dayton - Eastgate) 230 kV Line 496 (China – Sabine) 138 kV Line 88 (Dayton - Cheek)

  23. Long Term Reliability Target Areas (2013 – 2017) Lacon 138 kV Substation 138 kV Line 571 (Jacinto - Porter) 138 kV Line 582 (Porter – Oak Ridge)

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