1 / 13

Lower Rio Grande Valley (LRGV) 345 kV Project

Lower Rio Grande Valley (LRGV) 345 kV Project. Revised AEPSC Proposal. Option 1 Construct a new 148 mile, single circuit 345kV line from Laredo Lobo to Rio Bravo to North Edinburg, utilizing 2-954 ACSR conductor on double-circuit capable structures, and a 24 ohm 3600 amp series capacitor

laddie
Download Presentation

Lower Rio Grande Valley (LRGV) 345 kV Project

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Lower Rio Grande Valley (LRGV) 345 kV Project

  2. Revised AEPSC Proposal • Option 1 • Construct a new 148 mile, single circuit 345kV line from Laredo Lobo to Rio Bravo to North Edinburg, utilizing 2-954 ACSR conductor on double-circuit capable structures, and a 24 ohm 3600 amp series capacitor • Energized reconductor (live-line) for the existing Lon Hill-Nelson Sharpe-Ajo-Rio Hondo 345kV line and Lon Hill-North Edinburg 345kV line to 1988/2426 MVA normal/emergency rating • The incremental cost of the energized reconductor (live-line) is estimated to be about $15M for each line for a total incremental cost $30M • The total cost for this option is estimated to be $500 million. • The Del Sol station and Del Sol-Frontera 345 kV line has been removed from the AEPSC proposal

  3. Reconductor schedule for existing 345 kV

  4. Project Options selected for detail studies • Based on the initial voltage stability and thermal transfer study results (for 2016 & 2020) and cost estimates, the nine options studied were narrowed down to the following options for detail studies: • Option 1 - AEPSC proposal (with energized reconductor) • Option 5D – Construct approximately ~ 200 mile, 345kV transmission line from Pawnee to North Edinburg double Ckt., utilizing 2-954 ACSR conductor with 50% Series Compensation on each circuit • Option 6 - Construct approximately 220 mile, +/- 400 kV 1000 MW classic HVDC line from Pawnee to Loma Alta, Two 345/138kV 500 MVA autos at Loma Alta and a new 14 mile, 345 kV from LaPalma to Loma Alta

  5. ERCOT - South Texas Transmission System

  6. 2016 Study Results for N-1 + G-1 LRGV Load MW Options 1 is limited by voltage stability, no thermal limits * Load forecasts including the 250 MW new load in Brownsville

  7. 2016 Study Results for N-1-1 LRGV Load MW * Load forecasts including the 250 MW new load in Brownsville

  8. Thermal Overloads in 2016 with/without Option 1 * Base case overload Overload highlighted in green have projects identified in 5YTP

  9. Thermal Overloads in 2016 with/without Option 5D * Base case overload Overload highlighted in green have projects identified in 5YTP

  10. Thermal Overloads in 2016 with/without Option 6 * Base case overload Overload highlighted in green have projects identified in 5YTP

  11. Comparison of the alternatives * Initial ERCOT cost estimates ** Projects not approved by RPG + Limited by voltage stability, no thermal limit

  12. Work in progress • Evaluating 500 kV or 765 kV alternative for Option 5D • Update/ refinethe cost estimates • Complete the study report with final recommendation by August 25th.

  13. Questions? March 12, 2010 RPG Meeting

More Related