20221220PAC to Staff Supplemental Responses.pdf

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1407 W North Temple, Suite 330
Salt Lake City, Utah 84116
IC
iSS!ON
December 20,2022
Jan Noriyuki
Idaho Public Utilities Commission
472W. Washington
Boise, ID 83702-5918
ian.norivuki@fuc. idaho.eov (C)
Yao Yin
Yao.Y in@puc. idaho. eov
RE ID PAC.E.22.I4
IPUC Set I (l-24)
Please find enclosed Rocky Mountain Power's I't Supplemental Responses to IPUC lst SetData
Requests 9, 13,14,16,17, 18, and 19. Provided via BOX are Confidential l't Supplemental
Attachments IPUC 9-1,9-2, and 9-3. 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.
If you have any questions, please feel free to call me at [phone].
Sincerely,
_g_
M&rk Alder
Manager, Regulation
PAC-E-22-14 / Rocky Mountain Power
December 20,2022
IPUC Data Request 9 - ls Supplemental
IPUC Data Request 9
Please respond to the following regarding the existing demand response
progftrms:
(a) Please confirm that the capacity values of the existing demand response
progrrms are based on a L}A-megawatt ("MWu) residentiaUsmall commercial
air conditioner load control program, a 205-MW inigation load management
progftrm, and l9l-MW intemrptible contacts, as described on page 147 ofthe
2021 IRP.
(b) Please explain why Page 45 of the Update states the Company has had
intemtptible contracts for approximately 177 MW of load intemrption
capability for many years. Please reconcile the l9l MW and the 177 MW
(c) Please confirm that the capacity values of the existing demand response
programs include projected growth in those programs over time. [f so, please
explain how projected growth is determined for each program. tf not, please
explain how the capacity values ofthe existing demand response progftrms are
determined over the planning horizon.
(d) Please explain what causes the difference between the existing demand
response capacity in the 2021 IRP and the existing demand response capacrty
in the Update.
I't Supplemental Response to IPUC Data Request 9
Further to the Company's response to IPUC Data Request 9 dated November 15,
2022,the Company provides the following additional information:
Please refer to Confidential Attachment IPUC 9-l I't Supplemental which
provides resource-specific capacity contribution values from PacifiCorp's2021
Integrated Resource Plan (lRP) Update. For details on energyJimited resources,
including batteries and demand response (DR), please refer to Confidential
Attachment IPUC 9-2l't Supplemental, specifically file *57252 LandR CONF
v4", tab "Energy-Limited. Additional supporting work papers for the capacity
contribution values inthe202l IRP Update are also provided in Confidential
Attachment IPUC 9-2I't Supplemental. Please refer to Confidential Attachment
IPUC 9-3 I't Supplemental which provides the resource-specific capacity
contribution values from the 2021 IRP.
(a) For details on the modeled megawatt (MW) values for the requested
programs, please refer to Confidential Attachment IPUC 9-2L"t Supplemental,
specifically file"57252 LandR CONF v4",tab "Energy-Limited". Note: the
modeled MW values oorrespond to the expected availability of the progfttm,
PAC-E-22-14 / Rocky Mountain Power
December 20,2022
IPUC Data Request 9 - l't Supplemental
which may be lower than the non-coincident peak (NCP) capacity of all
program participants. The duration of the program also impacts the summer
and winter capacity contribution of a program. Over time, as more duration-
limited battery resource are added to the Company's portfolio, the capacity
contribution for a given duration declines.
(b) Please refer to the Company's response to subpart (a) above for details on the
modeled program capacity values and reported capacity contribution values
by program from the 2021 IRP Update.
(c) The modeled values include only existing participation. Growttr in the
programs is modeled as'New Demand Response", even if it is incremental to
an existing program.
(d) Please refer to the Company's response to subpart (a) above for details on the
modeled program capacity values and reported capacity contribution values
by program from the 2021 IRP Update.
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 Protective Agreement executed in this proceeding.
Recordholder:Dan MacNeil
Sponsor:Dan MacNeil
PAC-E-22-14 / Rocky Mountain Power
December 20,2022
IPUC Data Request l3 - I't Supplemental
IPUC Data Request 13
Page 15l of the 2021 IRP states that the existing energy efficiency is 73 MW.
Response to Staffs Production Request No. 22 (e) in Case No. PAC-E-21-19
states that 73 MW is incorrect and should have been 68 MW. However, page 44
of the Update states that 73 MW is used in the Update. Please explain whether it
should have been 68 MW in the Update.
l't Supplemental Response to IPUC Data Request 13
Further to the Company's response to IPUC Data Request l3 dated November 15,
2022, the Company provides the following additional information:
Yes, the reference on page 44 of PacifrCorp's 2021lntegrated Resource Plan
(IRP) Update should have been 68 megawatts (MW).As indicated in the text of
the202l IRP Update, the existing energy efficiency @E) is embedded in the load
forecast, therefore, this value is not singled out in the load and resource
calculation. For details on the load and resource calculation, please refer to the
Company's l't Supplemental response to IPUC Data Request 9, specifically
Confidential Auachment IPUC 9-2 I't Supplemental, which provides work papers
demonstrating the calculations of the capacity contribution values for the 2021
IRP Update. Resource-specific capacity contribution values are provided in
Confidential Attachment IPUC 9-l I't Supplemental. Resource-specific values for
the202l IRP are provided in Confidential Attachment IPUC 9-3 I't
Supplemental.
Recordholder:Dan MacNeil
Sponsor:Dan MacNeil
PAC-E-22-14 / Rocky Mountain Power
December 20,2022
IPUC Data Request 14 - I't Supplemental
IPUC Data Request 14
Please explain how the capacrty values of Sales are determined and if the capacity
values of Sales in the Update match those in the202l IRP. If not please e4plain
what causes the difference.
I't Supplemental Response to IPUC Data Request 14
Further to the Company's response to IPUC Data Request 14 dated November 15,
2022, the Company provides the following additional information:
Please refer to the Company's ltt Supplemental response to IPUC Data Request 9,
specifically Confidential Attachment IPUC 9-2|'i Supplemental and Confidential
Attachment IPUC 9-3 I't Supplemental, which provides work papers
demonstating the calculations of the capacrty contibution values for
PacifiCorp's2021 Integrated Resource Plan (IRP) Update and the 2021 IRP,
respectively.
Recordholder:Dan MacNeil
Sponsor:Dan MacNeil
PAC-E-22-14 / Rocky Mountain Power
December 20,2022
IPUC Data Request 16 - I't Supplemental
IPUC Data Request 16
Please respond to the following regarding "Contracts" line item in the Update:
(a) Please defme "Contracts" in the Update and explain what types of contacts
are included in "Confacts" (such as long-term firm contacts and short-term
firm contacts.)
(b) Please explain if all the contracts have been approved by the Commission.
(c) Are they the same as "Purchase" inthe 2021IRP? If so, please explain what
causes their capacity values to change between the202l IRP and the Update.
l't Supplemental Response to IPUC Data Request 16
Further to the Company's response to IPUC Data Request l6 dated November 15,
2022,the Company provides ttre following additional information:
(a) Short-term contacts are not included in the "Conhacts'o category, but rather in
the "Front Office Transactions" (FOT) category, as short-term contacts
would not have been committed to at the time the Integrated Resource Plan
(IRP) is prepared for nearly all of the study horizon. FOTs represent a forecast
of the short-term confiacts that may be needed in the future. "Contract"
includes all other resources that are not otherwise captured, for example in
"Solar" or "Wind". For details, please refer to the Company's lt'
Supplemental response to IPUC Data Request 9, specifically Confidential
Attachment IPUC 9-2L't Supplemental, which provides work papers
demonstrating the calculations of the capacrty contribution values for
PacifiCorp' s 2021 IRP Update.
(b) The only contracts which are generally subject to pre-approval by a
commission are qualifying facilities (QF) power purchase agrcements (PPA),
and those contracts included inthe202l IRP and 2021 tRP Update were
approved. For the 2023 IRJ, the Company is assuming that most existing QFs
will renew their contracts upon expiration, based on recent history, and will be
including a percentage of each expiring QF indefinitely. This extension
would not reflect approved contracts.
(c) The category definitions did not change. For details on the change in capacity
values, please refer to the Company's original response to IPUC Data Request
9.
Recordholder:Dan MacNeil
Sponsor:Dan MacNeil
PAC-E-22-14 / Rocky Mountain Power
December 20,2022
IPUC Data Request 17 - I't Supplemental
IPUC Data Request 17
Please confirm whether the line item "Thermal" in the 2021 IRP should be the
sum of the line item "Coal" and the line item "Gas' in the Update. If so, please
explain why the capacity values of "Thermal" are not ahvays the sum of "Coal"
and "Gas".
l't Supplemental Response to IPUC Data Request 17
Further to the Company's response to IPUC Data Request l7 dated November 15,
2022, the Company provides the following additional information:
Please refer to the Company's lo Supplemental response to IPUC Data Request 9,
specifrcally Confidential Attachment IPUC 9-2L"t Supplemental, which provides
work papers demonstrating the calculations of the capaclty contibution values for
PacifiCorp' s 2021 IRP Update. Resource-specific capacity conffibution values
are provided in Confidential Attachment IPUC 9-1 I't Supplemental.
Recordholder: Dan MacNeil
Sponsor:Dan MacNeil
PAC-E-22-14 / Rocky Mountain Power
December 20,2022
IPUC DataRequest l8 - l't Supplemental
IPUC Data Request 18
Please explain what causes the difference between the capacity values of
"Hydroelectric" in the 2021 IRP and those in the Update.
l't Supplemental Response to IPUC Data Request 18
Further to the Company's response to IPUC Data Request l8 dated November 15,
2022, the Company provides the following additional information:
Please refer to the Company's l" Supplemental response to IPUC Data Request 9,
specifically Confidential Attachment IPUC 9-2L"t Supplemental, which provides
work papers demonstating the calculations of the capacity contibution values for
PacifiCorp's2021IRP Update. Resource-specific capacrty confiibution values are
provided in Confidential Auachment IPUC 9-l I't Supplemental. Resource-
specific values for the 2021 IRP are provided in Confidential Attachment IPUC 9-
3 I't Supplemental.
Recordholder:Dan MacNeil
Sponsor:Dan MacNeil
PAC-E-22-14 / Rocky Mountain Power
December 20,2022
IPUC Data Request l9 - I't Supplemental
IPUC Data Request 19
Please confirm whether the line item "Renewable" in the202l IRP should be the
sum of the line item "Solar," uwind," and "Geothermal" in the Update.If so,
please explain why the capacity values of "Renewable" are not the sum of
"Solar," uWin{" and "Geothermal" for all the years in the planning horizon.
l't Supplemental Response to IPUC Data Request 19
Further to the Company's response to IPUC Data Request 19 dated November 15,
2022, the Company provides the following additional information:
Please refer to the Company's l" Supplemental response to IPUC Data Request 9,
specifically Confidential Attachment IPUC 9-2l"t Supplemental, which provides
work papers demonstrating the calculations of the capacrty contibution values for
PacifiCorp's2021IRP Update. Resource-specific capaclty contribution values are
provided in Confidential Attachment IPUC 9-1 I't Supplemental. Resource-
specific values for the 2021 IRP are provided in Confidential Auachment IPUC 9-
3 l't Supplemental.
Recordholder: Dan MacNeil
Sponsor:Dan MacNeil