Path Rating Catalog 2013 - Western Electricity Coordinating Council

Added January 2013
III-10. TOT 4A (Post-Gateway)
Location:
Definition:
Accepted Rating
Existing Rating
Southwest Wyoming
Sum of the flows on the following transmission lines:
Line
Metered End
Riverton-Wyopo 230 kV
Riverton
Spence-Mustang 230 kV
Spence
Windstar-Aeolus 230 kV #1
Windstar
Windstar-Aeolus 230 kV #2
Windstar
Dave Johnston-Aeolus 230 kV Dave Johnston
Other
Transfer Limit: Northeast to Southwest: 2175 MW
Critical The outage of the proposed Aeolus-Anticline 500 kV line.
Disturbance
that limits the
transfer
capability:
When: Technical Studies accepted 12/13/2010
System
Conditions:
Study Criteria:
Remedial
Actions
Required:
Formal
Operating
Procedure:
Allocation:
Interaction
w/Other
Transfer Paths:
This rating is independent of transfer levels between major areas of
WECC. Historically, the flows have all been northeast to southwest across
the path.
(Summary)
System intact:
• Per unit voltages between 0.95 p.u. and 1.05 p.u.
• All lines and transformers loaded to less than continuous rating.
Single contingency outage conditions:
• Per unit voltages between 0.90 p.u. and 1.10 p.u.
• All facilities loaded to less than 100% of emergency ratings.
Remedial actions are required to achieve the rated transfer capacity.
For certain N-1 & N-2 outages the Dave Johnston 230/115 kV transformer
needs to be tripped.RAS schemes applicable to the West and South of
Aeolus Path ratings.
TBD
PAC has the entire transfer capability of the path.
None
PART VI Item 1-233