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Transmission Capital Project Updates

Transmission Capital Project Updates. Transmission Expansion Plan . Sigurd to Red Butte 345 kV line in-service May, 2015 Permitting activities continue on key segments including Gateway West, Gateway South, Oquirrh – Terminal, and Boardman to Hemingway. Main Grid System Reinforcement Projects.

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Transmission Capital Project Updates

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  1. Transmission Capital Project Updates

  2. Transmission Expansion Plan • Sigurd to Red Butte 345 kV line in-service May, 2015 • Permittingactivities continue on key segments including Gateway West, Gateway South, Oquirrh – Terminal, and Boardman to Hemingway

  3. Main Grid System Reinforcement Projects • On-going reinforcement projects in all states. Projects include: • NERC TPL improvements (N-1, N-1-1) • Reconductoring for higher capacity • New substations • Substation transformer capacity increases • New circuit breakers and bus configurations • Reliability / Voltage improvements • Capacitor banks • Reactors • Synchronous condenser

  4. Main Grid System Reinforcement Projects Cont. • Key On-going or Upcoming Projects Include: • Goshen Area Load Tripping RAS (ID) • Goshen-Jefferson-State Line 161 kV Reconductor (ID) • Casper Sub Install 230-115 kV 250 MVA Transformer (WY) • Standpipe Substation New 230 kV Sub (WY) • Ben Lomond to Parrish 138 kV Line (UT) • Union Gap – Add 230-115 kV Capacity (WA) • Vantage – Pomona Heights 230 kV line (WA) • Sams Valley 500-230 kV New Sub (OR) • Snow Goose 500-230 kV New Sub (OR)

  5. Generation Interconnection & Customer Driven Projects • PacifiCorp is obligated to interconnect generation customers • The transmission facility additions for interconnections shall maintain or improve the level of system reliability • Qualifying Facility generation interconnection requests continue to be a significant number of the requests moving forward • Network Customer Projects are being constructed to meet actual and studied/forecasted load requirements

  6. Generation Interconnection & Customer Driven Projects Cont. • Key On-going or Upcoming Projects Include: • Pavant-Flowell-Fillmore 138 kV Rebuild (UT) • Hurricane West (Purgatory Flat substation) New Delivery Point (UT) • St. George Sub Install 345-138 kV Transformer (UT) • Wallula to McNary 230 kV Line (WA/OR)

  7. Local Transmission Reinforcement Projects • Local Transmission and Substation system reinforcement projects are on-going in all states • Projects are identified in the Five Year Area Planning studies • Actual loading levels + forecasted load determines timing of the projects • Projects include: • Substation transformer capacity additions • New substations and load transfers • Transmission line reinforcements to increase capacity • Voltage conversions

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