20180208PAC to Staff Amasa RAS - Assessment.docx

PacifiCorp Main Grid Planning
PRC-(012 through 014)-WECC-CRT2
Attachment B RAS Assessment
RAS Name
Amasa LAPS
Reporting Party
PacifiCorp
Group Conducting Assessment
PacifiCorp Transmission
Assessment Date
4/13/2016
Review the scheme purpose and impact to ensure proper classification, is it (still) necessary, does it serve the intended purposes, and does it continue to meet current performance requirements.
The Amasa LAPS is designed to prevent thermal overloads on the 230 kV lines west of Plate substation following the N-1 loss of DJ to Amasa 230 kV line in conjunction with heavy output from wind generation facilities in south-central Wyoming. The scheme trips the wind generation connected at Amasa (Pioneer Wind).
The Amasa LAPS is listed as a Local Area Protection Scheme. This designation is appropriate due to the level of generation tripping (<1000 MW) and load loss exposure (<300 MW). Impacts are limited to thermal overloads on 230 kV lines west of Platte substation. These overloads fall below the 30 minute emergency rating. There are no system impacts for inadvertent operation of the scheme.
Study Years
2016
System Conditions
Simultaneous heavy transfer conditionson TOT4A and TOT4B in conjunction with wind generation heavy generation in south-central Wyoming
Contingencies analyzed
(select what applies)
N-1
N-1-1
N-2
Extreme
N-1
Date when the technical studies were completed
2016
Does the RAS comply with NERC standards and WECC Criteria?
Yes
Discuss any coordination problems found between this RAS and other protection and control systems during this (most recent) assessment.
None
Provide a Corrective Action Plan if this RAS was found to be non-compliant or had coordination problems during this (most recent) assessment (should be NA for owner’s initial assessment).
N/A
Additional Notes
N/A