Rocky Mountain Power Five Year Study Findings & Kick Off Meeting
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1 2000 PACIFICORP PAGE 1 Attachment K Rocky Mountain Power Five Year Study Findings & Kick Off Meeting Thursday, December
2 2000 PACIFICORP PAGE 2 Study Areas for 2016 Findings Reports Southeast, Utah Nicole DeGiulio Vernal, Utah Sachith Abayakoon Kickoff Studies Salt Lake Valley, Utah Nicole DeGiulio Wyoming West, Wyoming Carlton Jones
3 2000 PACIFICORP PAGE 3 Southeast Study Findings AREA PLANNER: NATHAN WILSON Prepared by: Nicole DeGiulio
4 2000 PACIFICORP PAGE 4 System Overview Covers 6,500 square miles Main source is Pinto (via 345 kv Huntington to Four Corners), Abajo & Moab 31 substations, 14 being customer owned Area has 345, 138, and 69 kv lines The study will concentrate on 138 kv and 69 kv lines and associated substations
5 2000 PACIFICORP PAGE 5 Load Growth Base System Loads o o Summer 2016: 90 MW Winter : 82 MW Growth: o Average Summer Percentage 1.8% o Average Winter Percentage 1.6% Projected System Loads o o Summer 2021: 103 MW Winter : 92 MW Distribution capacity: 77 MVA Area Utilization Factor: 35%
6 2000 PACIFICORP PAGE 6 N-0 Conditions Increase Capacity Seven Mile Upgrade, 2017 Seven Mile transformer loads to 106% (0.35 MVA) Solution: Replace existing transformer with a 0.5 MVA Regulators replacement is not required Estimated cost: $120k
7 2000 PACIFICORP PAGE 7 N-0 Conditions Increase Capacity Spanish Valley Upgrade, 2018 Spanish Valley transformer loads to 147% (9.2 MVA) after load is switched to it in 2018 Solution: Replace existing transformer with a 14 MVA. Regulators and fuse will have to be upgraded as well Estimated cost: $1.4m
8 2000 PACIFICORP PAGE 8 N-0 Conditions Improve Voltage Rattlesnake feeder issue, 2020 Rattlesnake has two 25 kv feeders. The RAT22 feeder will experience low voltage in 2020 Solution: Install new kv substation called Disappearing Angel. This will take load off of the feeder with low voltage issues Estimated cost: $1.67m
9 2000 PACIFICORP PAGE 9 N-1 Conditions There were no prominent N-1 conditions
10 2000 PACIFICORP PAGE 10 Total Construction Costs Construction Item 2017 CONSTRUCTION Cost Seven Mile ~ Increase Capacity $120k Spanish Valley ~ Increase Capacity 2018 CONSTRUCTION 2020 CONSTRUCTION Rattlesnake ~ Install Disappearing Angel substation TOTAL COST Subtotal $120k Subtotal Subtotal $1.40m $1.40m $1.67m $1.67m $3.185m
11 Any questions or comments? 2000 PACIFICORP PAGE 11
12 2000 PACIFICORP PAGE 12 Vernal Study Findings AREA PLANNER: NATHAN WILSON Prepared by: Sachith Abayakoon
13 2000 PACIFICORP PAGE 13 Vernal Study Area Town of Hanna in west Town of Vernal in east Bonanza Power Plant (Deseret Gas & Transmission) Approximately 53 miles northwest of Helper, Utah
14 2000 PACIFICORP PAGE 14 System Overview About 1,700 sq miles of territory located in Duchesne & Uintah counties Major communities served are Vernal & Maeser 11 substations, four customer owned Transmission voltages include 345,138, & 69 kv
15 2000 PACIFICORP PAGE 15 Vernal Area Generation Generation from Flaming Gorge contributes to the area Bonanza (owned by Deseret Generation & Transmission) is the only generation within the study area
16 2000 PACIFICORP PAGE 16 Load Growth Base System Loads o o Growth Summer 2016: 123 MW Winter : 145 MW o Average Summer Percentage 2.1% o Average Winter Percentage 2.3% Projected System Loads o o Summer 2021: 137 MW Winter : 163 MW Distribution capacity 60 MVA Area Utilization Factor: 71%
17 2000 PACIFICORP PAGE 17 N-0 Conditions There were no prominent N-0 conditions
18 2000 PACIFICORP PAGE 18 N-1 Conditions Improve Voltage Loss of UPALCO Bonanza 138 kv line, 2017 Low voltage in Myton (0.89 pu at 69 kv) Solution: Tap change from tap #1 to tap #2 Estimated cost: N/A
19 2000 PACIFICORP PAGE 19 N-1 Conditions Improve Voltage Loss of WAPA Vernal Ashley 138 kv line, 2017 The 69 kv system will experience low voltage Solution: Install a new two Stage 15 Mvar capacitor bank on Ashley 138 kv and remove one stage of capacitors on Ashley 69 kv Estimated cost: $1.9 M
20 2000 PACIFICORP PAGE 20 Total Construction Costs Construction Item 2017 CONSTRUCTION Cost Ashley ~ Adding 2 stage 15 Mvar each capacitor bank at Ashley 138 kv $1.9 m Subtotal $1.9 m TOTAL COST $1.9 m $18.425m
21 Any questions or comments? 2000 PACIFICORP PAGE 21
22 2000 PACIFICORP PAGE 22 Study Areas for 2016 Kickoff Studies Salt Lake Valley, Utah Nicole DeGiulio Wyoming West, Wyoming Carlton Jones
23 2000 PACIFICORP PAGE 23 Salt Lake Valley Study Service Area Area is located in Salt Lake County Main sources are Terminal, MidValley, 90 th South and Oquirrh. Local Generation is Gadsby and West Valley Generators.
24 2000 PACIFICORP PAGE 24 Salt Lake Valley Study Info Covers 350 square miles in Salt Lake County Serve 1 municipal customer: Murray City 117 substations, 26 are customer owned Transmission voltages are 46, 138 & 345 kv Study will concentrate on the 138 & 46 kv portion of the system
25 Any questions or comments? 2000 PACIFICORP PAGE 25
26 2000 PACIFICORP PAGE 26 Wyoming West Study Service Area Pinedale and industrial load in the north 230 kv feeds 69 kv through Chimney Butte Naughton Plant near Kemmerer 230 kv source from Eastern Wyoming 138 kv system feeds Evanston area
27 2000 PACIFICORP PAGE 27 Wyoming West Study Info Covers 9,000 square miles in Lincoln, Sublette, & Uinta Counties Main source is the 230 kv lines from Monument 36 substations, 17 are customer owned Transmission voltages are 69, 138, and 230 kv Load is approximately 90% industrial Generation at Naughton, Mountain Wind, and Hinshaw (740, 140, and 125 MW)
28 Any questions or comments? 2000 PACIFICORP PAGE 28
Rocky Mountain Power Five Year Study Findings & Kick Off Meeting
2000 PACIFICORP PAGE 1 Attachment K Rocky Mountain Power Five Year Study Findings & Kick Off Meeting Thursday, June 9 th 2016 2000 PACIFICORP PAGE 2 Rocky Mountain Power Area Transmission Planning Manager:
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