Path Rating Catalog 2013 - Western Electricity Coordinating Council

Added February 2011
II-7. Path 3 S-N Rerating (Thermal
Upgrade) Project
Accepted Rating
Existing Rating
Other
Location:
Washington and southern British Columbia
Definition:
(Path 3)
Transfer Limit:
Critical
Disturbance
that limits the
transfer
capability:
BC Hydro, operates, and manages all transmission equipment owned by BC
Hydro in British Columbia.
Line Owner Metered End
Custer (BPA)-Ingledow (BCH)
500 kV lines 1&2 (Westside Intertie) Joint Ingledow(North end)
Boundary (BPA)-Waneta (TECK)
230 kV (Eastside Intertie,
Normally Open) Joint Boundary (South end)
Boundary (BPA)-Nelway (BCH)
230 kV (Eastside Intertie,
Normally Close) Joint Boundary (South end)
Comprehensive Progress Report indicates that Path 3 Northwest - British
Columbia South to North is capable of 3000 MW. Path 3 has been accepted
into Phase 2 of the Path Rating Process with a South to North Planned Rating
of 3000 MW.
Under system normal configuration and realistic, favourable system
conditions, applying single and double contingencies in BPA, Columbia Grid
& BC hydro systems, the steady state power flow and transient stability
studies have shown that with proper mitigation, the Northwest-British
Columbia Path rating (South to North) can be increased to 3000 MW from the
current rating of 2000 MW. The study also shows that loss of one of two
Custer (BPA)-Ingledow (BCH) 500 kV lines would overload the remaining
500 kV line if S-N transfer is more than 3000 MW. See Phase 1 report at
Path3_S-N3000
When: Planned Rating confirmed by letter from TSS Chair dated February 15, 2011.
System
See Phase 1 report at Path3_S-N3000
Conditions:
Study Criteria: See Phase 1 report at Path3_S-N3000
Remedial
Actions
Required:
Formal
Operating
Procedure:
Allocation:
None required at this time
To be developed.
2750 MW: Custer (BPA)-Ingledow (BCH) 500 kV lines 1&2 (Westside
Intertie)
250 MW: Boundary (BPA)-Waneta (TECK) 230 kV (Eastside Intertie,
Normally Open) and Boundary (BPA)-Nelway (BCH) 230 kV (Eastside
PART VI Item 1-268