20211105Supplement to Application-Redacted.pdf

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Donovan E. Walker
An DACORP Company
DONOVAN E. WALKER
Lead Counsel
dwalke [e-mail]
November 5,2021
VIA ELECTRONIC MAIL
Jan Noriyuki, Secretary
ldaho Public Utilities Commission
11331 West Chinden Blvd., Building 8
Suite 201-A
Boise, ldaho 83714
Re Case No. IPC-E-21-35
ldaho Power Company's Application to Update the Gas Forecast in the
Incremental Cost lntegrated Resource Plan Avoided Cost Model
Dear Ms. Noriyuki:
Attached for electronic filing please find the Supplement to ldaho Power
Company's Annual Compliance Filing in the above entitled matter. lf you have any
questions about the aftached documents, please do not hesitate to contact me.
Very truly yours,
2dalQ
DEW:cld
Enclosures
DONOVAN E. WALKER (lSB No. 5921)
ldaho Power Company
1221 West ldaho Street (83702)
P.O. Box 70
Boise, ldaho 83707
Telephone: [phone]
Facsimile: (208) 3886936
dwa [e-mail]
Attorney for ldaho Power Company
BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION
IDAHO POWER COMPANY'S ANNUAL
COMPLIANCE FILING TO UPDATE THE
LOAD AND GAS FORECASTS IN THE
INCREMENTAL COST I NTEGRATED
RESOURCE PLAN AVOIDED COST
MODEL.
GASE NO. |PC-E-21-35
SUPPLEMENT TO IDAHO POWER
COMPANY'S ANNUAL COMPLIANCE
FILING
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ldaho Power Company (.ldaho Powef) hereby respectfully submits to the ldaho
Public Utilities Commission ("Commission") this supplementto its earlierfiling in this case.
This supplemental filing is in compliance with Order No. 34913 and updates the Peak
Hours and Premium Peak Hours used to calculate capacity payments for battery storage
resources in the lncremental Cost lntegrated Resource PIan ('lClRP") avoided cost
model.
SUPPLEMENT TO IDAHO POWER COMPANY'S ANNUAL COMPLIANCE FILING - 1
I. INTRODUCTION
ldaho Power filed its annual update to the load forecast and natural gas forecast
components of the lClRP, in compliance with Order Nos. 32697 and 32802, on October
15,2021. That filing should have included the first update to the Peak and Premium Peak
hours used to calculate capacity payments for baftery storage resources. As that would
have been the first update, ldaho Power inadvertently did not include it. ldaho Power
respectfully submits the update to the Peak Hours and Premium Peak hours with this
supplemental filing.
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ldaho Power has refreshed its analysis of peak forecasted hours for 2022, using
the same data as the load forecast submitted in the October 15,2021, update. ldaho
Power has also refreshed its analysis of load lrom2021, net of solar generation, and the
analysis of Western Energy lmbalance Market prices trom 2021. Updated charts
including this data are included in Attachment A. ldaho Power also evaluated Loss of
Load Probability ('LOLP') data from the 2019 lRP. The 2019 IRP LOLP evaluation was
performed in AURORA to analyze the likelihood of unique loss-of{oad events in the year
2025. AURORA performed 100 iterations of the analysis tor 2025. ln al! those iterations,
four unique Ioss-of-load events occurred, all in July in the late afternoon/evening hours.
Based on the refreshed data, the Peak Hours for 2022 for July are 2:00 pm through
the 10:00 pm hour. For August, the Peak Hours are 4:00 pm through the 8:00 pm hour.
Compared to the 2021 Peak Hours this is a shift one hour later for each month. The
updated Premium Peak Hours for July are 5:00 pm through the 8:00 pm hour, a shift one
hour earlier compared to the 2021 Premium Peak Hours. The updated Premium Peak
SUPPLEMENT TO IDAHO POVVER COMPANY'S ANNUAL COMPLIANCE FILING - 2
hours for August are 5:00 pm through the 8:00 pm hour, a shift of one hour later compared
to the 2021 Premium Peak Hours.
As a result, ldaho Power is updating the Peak and Premium Peak Hour definitions
for battery storage capacity payments as follows:
Peak Hours: Hours that occur in July starting at 2:00*0e PM
and ending at 10:59:59*59;59 PM, and hours that occur in
August starting at f003;0e PM and ending at
8:59:59*5959. Peak Hours are subject to change annually
and when a new IRP is acknowledged.
Premium Peak Hours: Hours that occur in July, starting at
5:00e$e PM and ending at 8:59:59959;59 PM, and hours in
that occur in August, starting at 5:004+0e PM and ending at
8:59:59*5*59 PM. Premium Peak Hours are subject to
change annually and when a new IRP is acknowledged.
[. coNcLUStoN
ldaho Power hereby respectfully submits this updated Peak Hours and Premium
Peak Hours in compliance with the Commission's directives in Order No. 34913 and asks
the Commission to accept the same for filing.
Respectfully submitted this 5th day November 2021.
Mzddr4-
DONOVAN E. WALKER
Aftorney for ldaho Power Company
SUPPLEMENT TO IDAHO POWER COMPANY'S ANNUAL COMPLIANCE FILING.3
CERTIFICATE OF SERVICE
I HEREBY CERTIFY that on this Sth day of November 2021, I served a true and
correct copy of the within and foregoing Supplement to ldaho Power Company's Annual
Compliance Filing upon the following named parties by the method indicated below, and
addressed to the following:
Riley Newton
Deputy Attomey General
ldaho Public Utilities Commission
P.O. Box 83720
Boise, lD 83720-0074
_Hand Delivered
_U.S. Mail
_Overnight Mail
_ FAXX Email-riley.newton@puc
Christy Davenport, Legal Assistant
SUPPLEMENT TO IDAHO POWER COMPANY'S ANNUAL COMPLIANCE FILING - 4
ATTACHMENT A
2022 F orecast Average Load
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2021 Actual Load, Net of Solar Generation
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