Path Rating Catalog 2013 - Western Electricity Coordinating Council

Revised February 1998
Study Criteria:
Remedial
Actions
Required:
Formal
Operating
Procedure:
Allocation:
North to South:
System intact:
• Series capacitor loading within normal continuous rating on the
PG&E’s South-of-Tesla lines.
Single contingency outage conditions: (bipole outage)
• VAR margin of 300 MVAR (subsequently changed to 400 MVAR)
and minimum 500 kV voltage of 480 kV in PG&E’s system for posttransient
conditions.
• General WECC reliability criteria.
South to North:
System intact:
• Series capacitor loading within normal continuous rating on the
PG&E’s South-of-Tesla lines.
Single contingency outage conditions: (bipole outage)
• With minimum operating voltage profile in Idaho & Northwest areas,
VAR margin of 250 MVAR at Idaho’s critical bus (generally
Midpoint, Borah or Kinport) for post-transient conditions.
• Series capacitor loading within emergency thermal rating on the
PG&E’s South-of-Tesla lines.
• WECC reliability criteria. (8/11/87 version)
North to South:
Generator dropping in the Northwest, and series capacitor fast insertion on
the Pacific Intertie AC lines are remedial actions used for partial and full loss
of the PDCI intertie. Mechanically switched capacitors (MSC) have been
installed in the Northwest and COI systems for post-transient voltage support
for loss of the 3100 MW PDCI bipole system.
South to North:
Load dropping remedial action scheme in the Northwest is implemented for
loss of the 3100 MW PDCI bipole system. The Northwest and COI MSCs
will also be activated for post-transient voltage support.
North to South:
Arming of the generation dropping is performed by Northwest (BPA) by
monitoring the actual power flow on the DC line and the available generation
for dropping.
South to North:
Load-dropping in the Northwest is implemented. PDCI power flow
monitoring and load dropping arming is performed by the Northwest (BPA).
The percentage ownership and scheduling allocations of the line is as follows:
Ownership
SCE 50.00
LADWP 40.00
Glendale 3.85
Burbank 3.85
Pasadena 2.30
PART VI Item 1-171