20171218PAC to Staff Attachment Utah_DPU 10.11e.pdf

From:Wilson,Jason T.
To:Smith,Brandon
Cc:Hall,William (NTO);Ouist,Craiq;Kim,Seonq Tae;Hagen.Dave;Perez,Luis;Stratton,Greq;Leistner,Steven;
Patzkowski,Milton
Subject:Huntington LAPS Decommissioning
Date:Wednesday,May 20,2015 10:25:01 AM
Attachments:Summer2015 TOT2B-2C SOL Study Report-v2.docx
Brandon,
The Huntington LAPS can be decommissioned following completion of the Sigurd to Red Butte 345
kV line.The scheme was not considered in any contingencies in the latest 2B/2C SOL study report,
and system operating limits were determined without the RAS in-service.Please refer to the page 6
of the attached SOL report for language indicating that the scheme was not considered in the study.
No further study is required to remove the scheme from service.Note,this SOL study was
presented to and approved by RMOSG on April 2,2015.
Decommissioning of the Huntington LAPS was approved by the WECC RASRS on April 8,2015.
Please refer to the excerpt from the draft meeting minutes below.
Huntington LAPS Decommissioning
The primary function was to enhance the simultaneous transfer capability on TOT2B1/TOT2Cby
initiating generator tripping actions.The scheme is limited as the lines have not been operated above
the arming thresholds historically.PacifiCorp plans to decommission the scheme in June 2015
following completion of the Sigurd-Red Butte 345-kV line.
On a motion bv Mr.Barone and seconded bv Mr.Ham.the RASRS approvedremoval of the
Huntington RAS by consensus.
Please let me know if you need any further information.
Thanks,
Jason
Jason Wilson,PE
Senior Transmission Planner
PacifiCorp Main Grid Planning
Phone:[phone]
Email:iason.t.wilson©oacificoro.com