20170925Utah_OCS Set 5 (1-11)2.pdf

1407 W.North Temple
ROCKY MOUNTAIN Salt Lake City,UT 84116
POWER
A DIVISION OF PACIFICORP
September 6,2017
Gavin Mangelson
Office of Consumer Services
160 East 300 South
Salt Lake City,Utah [e-mail] (C)
RE:UT Docket No.17-035-39
OCS 5th Set Data Request (1-11)
Please find enclosed Rocky MountainPower's Responses to OCS 5th Set Data Requests 5.4-5.7.
Provided on the enclosed Confidential CD is Confidential Attachment OCS 5.4.Confidential
information is provided subject to Public Service Commission of Utah (UPSC)Rules 746-1-602
and 603.
If you have any questions,please call Tarie Hansen at [phone].
Sincerely,
Bob Lively
Manager,Regulation
Enclosures
C.c.Erika Tedder/DPU [e-mail]@utah.gov(C)
Dan Kohler/DPU [e-mail](C)
Dan Peac/DPU (C)(W)
Aliea Afnan/DPUaafnan@dayma_rkea.co_m(W)
Philip Hayet/OCS [e-mail] (C)
Gary A.Dodge/UAE [e-mail]_w.co_m(C)
Kevin Higgins/UAE (C)
Neal Townsend/UAE nttownsend@energy_grat.co_m (C)(W)
17-035-39 /Rocky Mountain Power
September 6,2017
OCS Data Request 5.4
OCS Data Request 5.4
Refer to the Company's estimates for wind generation.
(a)Does the Company anticipate that existing wind facilities and re-powered wind
facilities may degrade over time?Please explain and provide evidence showing that
wind performance does/does not degrade over time.
(b)Do the energy estimates provided account for potential degradationover time?Please
explain.
(c)Please provide all work papers used to determine the hourly energy patterns for
existing and repowered projects pasted in the followingfiles /tabs:
IRP Repower LGIA Limit vl3 WIC LJ.xlsm /Generation (LGIA Limited)
IRP Repower LGIA Limit vl3 40-Yr LJ.xlsm /Generation (LGIA Limited)
IRP Repower No Limit vl3 WIC LJ.xlsm /Generation(No LGIA Limited)
Response to OCS Data Request 5.4
(a)Yes.The Company has identified that project generationdegradationoccurs at an
increasing rate near a wind facility's end-of-life as the costs of making investments to
maintain equipment availabilityis no longerjustified by the remaining asset life.The
costs and generation impacts are represented in the data provided in each of the three
work papers referenced in subpart (c)of this request.
(b)Yes.Referencing the confidential work papers that accompanied the Direct
Testimony of Company witness,Rick T.Link,specifically the folder "Other
Summary Reports",the file "RePower Data 20170516 LGIA Limit vl3.xlsx",the tab
"Dunlap",cells AK20 and AL20,degradation can be seen in the repoweredresource
as it approaches end-of-life.Similar degradationcan be seen in cells AA37 and AB37
for the non-repoweredresource.
(c)PacifiCorp makes the clarification that the data represented in the indicated work
papers /worksheets is annual and not hourly.Hourly energy patterns are not
developed or provided,as hourlywind energy is not an inputto the models.With this
clarification,please refer to Confidential Attachment OCS 5.4,which provides the
work papers used to develop the annual generationvalues for each wind project.
Confidential information is provided subject to Public Service Commission of Utah
(UPSC)Rule 746-1-602 and 746-1-603.
17-035-39 /Rocky Mountain Power
September 6,2017
OCS Data Request 5.5
OCS Data Request 5.5
Please see "Repower Results Direct Testimony.xlsm"tab:"Price-Policy Annual -PaR"
rows 16 and 20.Please explain what Energy Efficiency/DSM costs are included in PaR
under the variable costs category (row 16)and what costs are included as fixed costs (row
20).Please provide work papers for each providing the derivation of each DSM cost.
Response to OCS Data Request 5.5
Referencing the confidential work papers that accompanied the Direct Testimony of
Company witness,Rick T.Link,specifically folder "Exhibits Figures Tables",file
"Repower Results Direct Testimony":
Row 16,"PaR Mean DSM":"PaR Mean DSM"is the sum of three cost components,
of which "fuel"is the most relevant:
(1)Fuel:The Planning and Risk (PaR)model reports the input "contract Price"for
demand-side management (DSM)as fuel cost.
(2)Start costs:There are no start costs modeled for energy efficiency/DSM.
(3)Variable operations and maintenance (VOM):In the System Optimizer model
(SO model),DSM costs are modified for a stochastic risk credit.PaR "inherits"
this stochastic risk credit from the SO model.Because PaR is a stochastic model
and inherentlyincludes the cost of stochastic risk,the SO stochastic risk credit is
removed by modeling an offsetting value as VOM.
"PaR Mean DSM"values are taken from "PaR Stochastic Summary"work papers
provided with the confidential work papers supporting the Direct Testimony of
Company witness,Rick T.Link,specifically folder "PaR Summary Reports".The
three cost components described above are on tab "Cost Summary"(rows 102,206
and 310)of the "PaR Stochastic Summary"work papers.The tab "Cost Summary"
summarizes data provided in tab "PaR StationData"of the same work paper.
Please refer to Attachment OCS 1.5 -1 for the energy efficiency/DSMinputs,
specifically the folder "Inputs -PUBLIC\DSM\Class 2",the file "IRP2017 DSM2
potential-20161021 with adjustments".
Row 20,"SO Sub-Total Fixed Costs":
"SO Sub-Total Fixed Costs"values are taken from "SO Portfolio"work papers
provided with Mr.Link's confidential work papers in folder "SO Model Summary
Reports".PacifiCorp models all energy efficiency/DSMcost as VOM and or fuel
costs and therefore no costs related to energy efficiency/DSMare included in this
line.
17-035-39 /Rocky Mountain Power
September 6,2017
OCS Data Request 5.6
OCS Data Request 5.6
Please explain why the Long-Term Contracts change between the "baseline"and "with
wind repowering"cases (see "Repower Results Direct Testimony.xlsm"tab:"Price-
Policy Annual -PaR"lines 10 and 36 (specifically cells X10 and X36).Are these
contracts priced relative to wholesale market costs?Please explain.
Response to OCS Data Request 5.6
The differences in long-term contracts values between the two cases are due to the
inclusion of renewables in the long-term contracts category reportedby the Planning and
Risk (PaR)model.The combination of selected resources changes between the "baseline"
and "with wind repowering"cases based on a least-cost/least-riskportfolio optimization,
resulting in a difference in the "PaR Mean LT Contracts"rows.
The long-term contracts"category of data includes portfolio elements such as
interruptible loads and exchanges that can change relative to market price curves.
However,the two cases being compared are using the same price curve assumptions
(medium gas,medium carbon dioxide (CO2)),and there are no changes to non-renewable
long-term contract portfolio elements.
Details of long-term contract elements are provided with the confidential work papers
supporting the Direct Testimony of Company witness,Rick T.Link,specifically the
folder "PaR Summary Reports",the files "PaR Stochastic Summary",tab
"PaR StationData".
17-035-39 /Rocky Mountain Power
September 6,2017
OCS Data Request 5.7
OCS Data Request 5.7
Please explain why the Long-Term Contracts change between "baseline"in the Mod Gas,
Mod CO2 scenario and the High Gas,0 CO2 scenarios (see "Repower Results Direct
Testimony.xlsm"tab:"Price-Policy Annual -PaR"lines 10 and 505 (specifically cells
X10 and X505).Are these contracts priced relative to wholesale market costs?Please
explain.
Response to OCS Data Request 5.7
Please refer to the Company's response to OCS Data Request 5.6.