Path Rating Catalog 2013 - Western Electricity Coordinating Council

January 2013
Study Criteria:
Remedial
Actions
Required:
Formal
Operating
Procedure:
Allocation:
Interaction
w/Other
Transfer Paths:
NERC/WECC Reliability Criteria For Transmission System Planning
A remedial action scheme is required to achieve the 2250 MW west to east
transfer capability simultaneous with high Hells Canyon generation (IPC-2
Automatic Reduction of Hells Canyon Generation).
Under certain generation and load conditions, 3400 MW Idaho to Northwest
transfer simultaneous with heavy Northwest to California transfers may cause
overloading of the Midpoint 500/345 kV transformer and/or the Midpoint
and/or Burns 500 kV series capacitors. During these conditions, one-half of
the Burns (or Midpoint) series capacitor can be bypassed to reduce loading
but it results in reduced Bridger West/Borah West capacity.
The transfer capability of the path is allocated among the interconnections as
follows:
Original Idaho-Northwest Transfer Capability:
• 2400 MW East to West:
1587 MW IPC - PAC interconnection
413 MW IPC - BPA interconnection
400 MW IPC - AVA interconnection
• 1200 MW West to East:
350 MW BPA - IPC interconnection
400-510 MW PAC - IPC interconnection
340-450 MW AVA - IPC interconnection
For the 1200 MW west-to-east, the sum of the PAC and AVA allocation
cannot be greater 850 MW (Seasonal Allocations: Spring – AVA 400 MW
and PAC 450 MW, Summer – AVA 340 MW and PAC 510 MW, and Winter
– AVA 450 MW and PAC 400 MW).
Hemingway-Boardman 500 kV Transfer Capability:
• 1000 MW East to West:
To Be Determined
• 1050 MW West to East:
To Be Determined
None.
PART VI Item 1-251