20220210PAC to Staff 1-38-2.pdf

ROCKY MOUNTAIN
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Salt Lake City, Utah 84116i-,-'lUlT
February 10,2022
Jan Noriyuki
ian.norivuki@ouc. idaho. eov (C)
Riley Newton
riley.newton@nuc. idaho. eov
RE ID PAC-E.2I.I9
IPUC Set I (l-38)
Please find enclosed Rocky Mountain Power's Responses to [PUC's I't Set Data Requests l-5, 7,
9-l l, 15, and 30. Also provided are Attachments IPUC I and 5-1. Provided via BOX is
Confidential Attachment IPUC 5-2. Confidential information is provided subject to protection
under IDAPA 31.01.01.067 and 31.01.01.233,the ldaho Public Utilities Commission's Rules of
Procedure No. 67 - lnformation Exempt from Public Review, and further subject to the Non-
Disclosure Agreement (NDA) executed in this proceeding.
If you have any questions, please feel free to call me at [phone].
Sincerely,
-Jsl-J. Ted Weston
Manager, Regulation
Enclosures
C.c. : Rose Monahan/Sierra Club [e-mail] (C)
Ana Boyd/S ierra CIub ana. boyd @.sierraclu b. ore (C)
Benjamin J. Otto/ICL botto@ idahoconservation. ore
PAC-E-2 l-19 / Rocky Mountain Pourer
February 9,2022
IPUCDaaRequest I
IPUC Data Request 1
2021 Integrated Rqource Phn (IRP)
Rooponso to IPUC Data Request 1
Please rcfer to Attaphment trUC l.
Recordholder: Kris Brcmer
Sponsor:Rick.4,. Vail
Pleaso provide a copy of the most cunenttansitioual cluster sfrrdy (Volume I -
Chapter 4, page 86).
PAC-E-21-19 / Rocky Mountain Power
February 9,2022
IPUC Data Request 2
IPUC Data Request 2
2021 lntqrated Resource Plln (IRP)
Please describe in detail the direct benefits to Idaho customers that are identified
in the transitional cluster study.
Response to IPUC Data Request 2
PacifiCoqp's generation interconnection cluster study process allows developers
to efficiently submit requests to propose new generation facilities on PacifiCorp's
system. The process provides developers the requirements and cost estimates
necessary to constuct their facilities. The result of this process is that new
generation ttrat is cost effective for PacifiCorp's customers can be identified and
contracted. For example, the cluster study used to inform PacifiCorp's2021
Integrated Resource Plan (IRP) modeling and analysis to identiff transmission
costs for PacifiCorp's2020 All Source Request for Proposals (2020AS RFP) final
shortlist bids resulting in a portfolio $1,265 billion more cost-effective than a
portfolio without these resources. Please refer to the 2021IRP, Volume I, Chapter
9 (Modeling and Portfolio Selection Results), page 277.Idaho customers benefit
directly from PacifiCorp's ability to provide safe and reliable service by selecting
the least-cost, least-risk altematives which provides system benefits to all
customers.
Recordholder:Kris Bremer
Sponsor:Rick A. Vail
PAC-E-21-19 / Rocky Mountain Power
February 9,2022
IPUC Data Request 3
IPUC Data Request 3
202tln'tqrated Resource P}nn (IRP)
The Aeolus-to-Mona ftansmission line (Gateway South), will provide delivery of
new renewable energy resources across the West. Please provide how Gateway
South will connect Idaho customers to the renewable resources when the said
transmission line runs north-south between Wyoming and Utah? (Volume I -
Chapter 4, page 86).
Response to IPUC Data Request 3
With the completion of Energy Gateway South, the capacity on the fransmission
system between eastern Wyoming and the Jim Bridger substation will increase
allowing opportunities for energy produced by additional zero-fuel-cost
renewable resources in Wyoming to flow to PacifiCorp's customers, including its
customers in Idaho.
Recordholder:Brian Fritz
Sponsor:Rick A. Vail
PAC-E-21-19 / Rocky Mountain Power
February 9,2022
IPUC Data Request 4
IPUC Data Request 4
2021 lnteg:rated Resource Plan (IRP)
The 2021preferred portfolio includes "near-term tansmission upgrades" when
discussing Boardman-to-Hemingway @2fD tansmission line. Are the
transmission upgrades necessary prior to B2H coming online? (Volume I -
Chapter 4,page 88). Please explain.
Response to IPUC Data Request 4
There is no relationship between the "near-term tansmission upgrades" and the
Boardman-to-Hemingway @2H) transmission line project.
Recordholder:Brian Fritz
Sponsor:Rick A. Vail
PAC-E-21-19 / Rocky Mountain Power
February 9,2022
IPUC Data Request 5
IPUC Data Request 5
2021 lntegrated Resource Plan (IRP)
Please provide the date and times in the last five years when the Midpoint-to-
Summer Lake pathway was capacrty constained for east to west and west to east
directions justifying ttre need for B2H.
Response to IPUC Data Request 5
Please refer to Attachment IPUC 5-l forthe dates over the past five years when
the Midpoint to Summer Lake 500 kilovolt (kV) line was out of service. The 500
kV line is part of Western Electricity Coordinating Council's (WECC) Path 14
"Idaho to the Northwest" with a rating of 2,400 megawatts (MW) east to west and
1,200 MW to 1,340 MW west to east. Per WECC's path rating catalog, Patr l4
rating is reduced with an outage of the Midpoint to Summer Lake line requiring
tripping of 350 MW to 700 MW of Jim Bridger and Wyoming wind generation.
In PacifiCorp's2021Integrated Resource Plan (IRP), a primary impact of the
Boardman-to-Hemingway (B2H) project is the increase of ttre Borah-Pop-to-
Hemingway tansmission path from 1,090 MW to 1,690 MW, enabling the
addition of 600 MW of enabled new wind, solar and battery resources. These
components allow for the re-optimized dispatch of the portfolio without creating
congestion and increase the value of the poffilio by $453 million compared to
the case without B2H. Based on a comparison of the least cost portfolio @02-
MM) to the'No BZH" variant case @02(d)-MM), during the three months of
highest usage of this path, B2H inueases energy transfers between the Borah-Pop
and Hemingway topology bubbles by an average of 90 percent. The system
benefits of B2H, including congestion relief, are clear in establishing the least-
cost least-risk portfolio and justi$ its inclusion. Please refer to Confidential
Attachment IPUC 5-2. Please also refer to the 2021 IRP, Volume [, Chapter 9
(Modeling and Portfolio Selection Results), page27l.
Confidential information is provided subject to protection under IDAPA
31.01.01.067 and 31.01.01.233,the Idaho Public Utilities Commission's Rules of
Procedure No. 67 - Information Exempt from Public Review, and further subject
to the Non-Disclosure Agreement (NDA) executed in this proceeding.
Recordholder:Brian Fritz / Randy Baker
Rick A. Yail lShay LaBraySponsor:
PAC-E-21-19 / Rocky Mountain Power
February 9,2022
IPUC Data Request 7
IPUC Data Request 7
202llntqrated Resource Plan (IRP)
Please provide an update as to the completion date of the Advanced Metering
Infrastructure currently being deployed in Idaho. Also include when real-time
data will be available to Idaho customers.
Response to IPUC Data Request 7
The Idaho Advanced Metering Infrastucture (AMI) project is scheduled to be
completed by December 31, 2022,baring any unforeseen resource or supply
issues. Real-time data will not be available to customers. Nextday, or nearreal-
time, interval data will be available to most customers. The data will be available
to each customer starting within 45 days of their meter installation.
Recordholder:Douglas Mam
Douglas MamSponsor:
PAC-E-21-19 / Rocky Mountain Power
February 9,2022
IPUC Data Request 9
IPUC Data Request 9
202llntegrated Resource Plan gRP)
Please provide the projected cost of the Populus-to-Hemingway tansmission
project and explain why the project is the least-cost least-risk alternative for
Idaho ratepayers.
Response to IPUC Data Request 9
Please refer to the confidential data disk accompanying PacifiCorp's2021
Integrated Resource Plan (RP), specifically folder "LT studies CONF.zip\LT
studies\LT Plan Summary\CETA", fi le " I 8609_2 I IRP 20yr_P02-MM-CETA",
tab "Transmission Annual Data" and look for "NC B2H Borah >Hemingway
2026" and column U for the build cost.
Please refer to the202l IRP, Volume I, Chapter 9 (Modeling and Portfolio
Selection Results), page2Tl for the analysis of removing the Boardman to
Hemingway (B2H) project. The project provides system benefits to PacifiCorp's
customers, including its customers in Idaho. Please also refer to the Company's
response to IPUC Data Request 5.
Recordholder: Dan Swan
Sponsor:Shay LaBray
PAC-E-21-19 / Rocky Mountain Power
February 9,2022
IPUC Data Request l0
IPUC Data Request 10
2021 lntegrated Resource Plan (IRP)
Please provide the projected cost of the Goshen area projects and explain why the
project is the least-cost least-risk altemative for Idaho ratepayers.
Response to IPUC Data Request 10
The"2023 Goshen RFP Wind", l5l megawatts (MW) project, was selected as
part of the final shortlist in PacifiCorp's 2020 All Source Request for Proposals
(2020AS RFP). Demand Response (DR) programs were selected in the PLEXOS
model as least-cost. These projects are least-cost, least-risk altematives that
provide system benefits to PacifiCorp's customers, including its customers in
Idaho. PacifiCoqp plans on a system-wide basis to provide benefits to all of its
customers. In the 2021lntegated Resource Plan (lRP) variant analysis, inclusion
of the 2020AS RFP projects resulted in $1,265 billion higher benefits to
customers relative to a portfolio without the projects.
Please refer to the confidential data disk accompanying PacifiCorp's 2021 IRP,
specifically folder "ST Studies CONF.zip\ST Studies\CETA", file "ST Cost
Summary -P02-MMGR-CETA ST Split Run Cost Data LT 18609 ST 19709", tab
"Generator Annual Data" for the resource cost. Please also refer to the 2021 IRP,
Volume I, Chapter 9 (Modeling and Portfolio Selection Results), page277.
Recordholder: Dan Swan
Sponsor:Shay LaBray
PAC-E-21-19 / Rocky Mountain Power
February 9,2022
IPUC DataRequest I I
IPUC Data Request 11
2021 Integrated Resource P}rn (IRP)
Please describe and quantiff "ongoing investnent in transmission infrastructure in
Idaho". (Volume I - Chapter 4, page 83).
Response to IPUC Data Request 11
Please refer to PacifiCorp's2021lntegrated Resource Plan (tRP), Volume I,
Chapter 4 (Transmission), section "Planned Transmission System Improvements"
on pages 100 through 103, which provides a list of ftansmission projects that
reflect ongoing investnents in PacifiCorp's transmission system.
Recordholder: Brian Fritz
Sponsor:Rick A. Vail
PAC-E-21-19 / Rocky Mountain Power
February 9,2022
IPUC DataRequest 15
IPUC Data Roquest 15
2021 lnteg:rated Resource Plan (IRP)
Please explain the benefrts and differences in costs for the new ITRON Riva AMI
meters and softrryare to be installed in ldaho.
Response to IPUC Data Request 15
The ITRON Riva Advanced Metering Infrasnucture (AMI) meters and software
will provide nextday interval data for customers via a web portal, on demand
meter register reads for customer service agents, remote disconnect/reconnect,
outage notifications, and remote reprogramming. Differences in cost vary by
meter type.
Recordholder:Douglas Mam
Douglas MarxSponsor:
PAC-E-21-19 / Rocky Mountain Power
February 9,2022
IPUC DataRequest 30
IPUC Data Request 30
2021 lntegrated Resource Plan (IRP)
Table 5.12 of the 2019 IRP shows that Planning Reservr (Load- Private
Generation -Energy Efliciency) x l3%o, in which Intemrptible Load is not used in
the calculation. However in the 2021 IRP, Table 6.1l, Table 6.12,and Table
6.13 shows that Planning Reserve = (Load - Private Generation - Existing
Demand Response - Existing Energy Efficiency - New Effrciency) x l3Yo where,
according to Page l52in$e2021 [RP, the intemrptible loads are contained in
Existing Demand Response and therefore is used in determining the Planning
Reserve. Please reconcile the two ways of calculating planning margin reserves
and explain why netting of the additional items from load is appropriate.
Response to IPUC Data Request 30
Note: the Company takes an opportunity to clarify that there is no "Table 6.13" in
the official published version of PacifiCorp's2021Integrated Resource Plan
(IRP), Volume I, Chapter 6 (Load and Resource Balance). The Company's
responses to IPUC Data Request 30 are therefore only referencing Table 6.1I
(Summer Peak - System Capacrty Loads and Resources without Resource
Additions) and Table 6.12 (Winter Peak System Capacity Loads and Resources
without Resource Additions).
The Company reports demand response as a reduction to load in the Total
Obligation section of Table 6.1I and Table 6.12 because demand response
resources differ from other resources in that they represent the opportunity to
reduce or shift load as needed to balance the system. The planning reserve
calculation n the 2021 IRP accounts for all of the programs that reduce load in
the same way.
Recordholder: Brian Osborn
Sponsor:Shay LaBray