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TOT3 Archer Interconnection Project. (Formerly TOT3 300 MW Upgrade Project) Results And Status David Gustad, TSGT August 19, 2010. Project Description. A new substation (called Arrow Substation) tapping the LRS-Story 345 kV line adjacent to Archer Substation
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TOT3 Archer Interconnection Project (Formerly TOT3 300 MW Upgrade Project) Results And Status David Gustad, TSGT August 19, 2010
Project Description • A new substation (called Arrow Substation) tapping the LRS-Story 345 kV line adjacent to Archer Substation • A 345/230 kV transformer at Arrow Substation with a minimum rating of 600 MVA • A short (less than 2 miles) 230kV Arrow – Archer transmission line • A 10-mile 230 kV Arrow – Cheyenne transmission line • Upgrade terminal equipment on the LRS – Ault 345 kV line to raise the rating above 2000 A • Upgrade terminal equipment on the LRS – Arrow 345 kV line to raise the rating above 2000 A
Background • Formerly TOT3 300 MW Upgrade Project • Formerly Sponsored by Basin • Sponsorship Changed to TSGT • Based on Alternative C from Wyoming Joint Queue Study (WJQS) • Basin Performed Phase I Study and Comprehensive Progress Report • Phase II Project Review Group (PRG) Kickoff November 21, 2008
Results • New Non-Simultaneous TOT3 Rating of 1844 MW Achieved • Limit-Defining Cell: • CPP at 243 MW • Pawnee Area Generation at 280 MW • LRS at 1140 MW • DC Ties Set East-West (Importing) at 300 MW • No Dynamic Stability Concerns • No Interactions with TOT4A or 4B • No Impact on TOT7 Transfer Capability
Timeline • Final Draft Completed and Submitted to PRG July 22nd • Sent Final Report to PRG August 17th • Next PRG Meeting Monday, August 23rd • Request Approval of Archer Interconnection Phase II Study Report • Start Discussions on TOT3/TOT7 Operating Interactions • Send Report to PCC with PRG Approval, for 30-day PCC Member Review • Request Phase III Status • ISD 4Q 2013