Study Team: Puget Sound Area Study Team
Puget Sound Area Study Team Overview
The 2008 System Assessment found deficiencies in the North Downtown Seattle area transmission system. Winter load growth is causing Seattle City Light’s Broad Street-Union, Massachusetts-Union, and Bothell-University 115-kilovolt lines to exceed ratings for several contingencies. There is also a concern about the impact any reinforcements in this area could have on the transfer capability between the Northwest and Canada on the Northern Intertie. ColumbiaGrid has assigned the resolution of this issue to the existing Puget Sound Area Study Team.
The Puget Sound Area Study Team is also looking into the operational impact between several other reliability projects planned in the Puget Sound Area and the capacity of the Northern Intertie.
The PSAST will also be used as the forum to provide the WECC review group for the Northern Intertie Path Rating Increase.
To request access to the BPA Winter Nomogram Operating Cases, please fill out and submit this confidentiality agreement.
To request access to the BPA Winter Nomogram Operating Cases, please fill out and submit this confidentiality agreement.
Documents
02/26/2016 Delridge-Duwamish Line Reconductor Reevaluation (v: 1)
06/03/2022 Redacted Version of "Transmission Expansion Plan for the Puget Sound Area: 10-20-10" (v: 1)
risk of use agreement required >>
02/27/2015 Puget_Sound_Area_Study_Team_2010_Expansion_Plan-Sections Relevant to the PSE Sammamish-Talbot Hill 230kV Project (v: 1)
risk of use agreement required >>
02/22/2013 PSAST Updated North to South Transmission Expansion Plan (v: 1)
risk of use agreement required >>
03/19/2012 PSAST Final Report: Updated Recommended Transmission Expansion Plan for the Puget Sound Area: 10-28-11 (v: 1)
risk of use agreement required >>
03/18/2012 Transmission Expansion Plan for the Puget Sound Area: 10-20-10 (v: 1)
- Biennial Transmission Expansion Plan
- > System Assessment
- > System Assessment Sensitivities
- > Centralia Closure Study Team
- > Puget Sound Area Study Team
- > Cross Cascades Study Team
- > Gas-Electric Interdependencies Study Team
- > Woodland Study Team
- > Northern Mid C Joint Operational Study Team
- > Northern Mid C Study Team
- > Othello Area Study Team
- > Mid-Columbia Reactive Power Study Team
- > Sensitivity Study for Long-term Alcoa Shutdown
- > Geomagnetic Disturbance (GMD) Study Team
- > (PRC-026) Relay Performance During Power Swing Study
