20220510Quarterly Report.pdf

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An IDACOf,P @mpanY
JULIA A. HILTON
Deputy Genera! Counsel
ihi [e-mail]
May 10,2022
Ms. Jan Noriyuki
Secretary
ldaho Public Utilities Commission
PO Box 83720
Boise, lD 83720-0074
Re:Case No. IPC-E-16-19
Deferral and Recovery of Costs Associated with Participation in Energy lmbalance
Market - California lndependent System Operator ("CA|SO') Quarterly Energy
lmbalance Market ('ElM') Benefits Assessment Report
Dear Ms. Noriyuki:
Pursuant to Order No. 33706 issued in Case No. IPC-E-16-19, ldaho Power Company
("ldaho Power" or "Company") hereby submits the quarterly CAISO Western EIM Beneflts Report
("Report") for the first quarter of 2022. The Report presents CAISO's quantification of benefits
associated with participation in the Western ElM. For the first quarter of 2022, CAISO estimated
Western EIM gross benefits of $6.29 million for ldaho Power.
The EIM has provided financial benefits to the Company, and ultimately its customers.
However, as discussed in ldaho Power's prior quarterly compliance filings as well as the
Company's May 24,2019, Report of EIM Benefits and Costs of Participation, CAISO's calculation
of benefits for ldaho Power is overstated due to several of the modeling assumptions used in its
benefit calculation. The Company developed a more precise methodology, that uses inputs
specific to ldaho Power, for determining actual EIM benefits, the details of which are discussed in
the Company's May 24,2019, Report of EIM Benefits and Costs of Participation.
lf you have any questions regarding this report, please contact Matt Larkin, Revenue
Requirement Senior Manager, at [phone] or [e-mail].
Sincerely,
t - L'u'v ( +-_
Julia A. Hilton
Enclosure
g Colifornio ISO WESTERN ENERGY IMBALANCE MARKET
To Our Partners in the WEIM,
The opportunity to work with many of you through the Western Energy lmbalance
lvlarket has been one of the most rewarding elemenb of my role here at the
California lndependent Sptem Operator. lt has been truly impressive to watch the
growth of the market and hor it has produced such significant economic and
environmental savings while deepening relationships and collaboration across the
West.
We are extremely honored and proud to reach this important milestone witr you for
the WENIs financial benefits and look forward to continue leveraging our collective
success into an extended day-ahead market and beyond. Thank you again for your
partnership.
Sincerely,
Elliot lvlainzer
www.caiso.com I ZsoOutcroppirBWay,Folsom,CA9s630 | slo.sst.+loo
fuq Colifornio ISO
Prepored by:
AAorket Anolysis ond Forecosting
April 21,2022
www.westerneim. com
WEIM BENEFITS REPORT FIRST QUARTER 2022
CONTENTS
EXECUTIVE SUMMARY......
BAGKGROUND..........
WEIM ECONOMIC BENEFITS IN Ql 2022
CUMULATIVE ECONOMIC BENEFITS SINCE INCEPTION
INTER-REG IONAL TRANSFERS ......................,,
WHEEL THROUGH TRANSFERS
3
4
4
5
o
REDUGED RENEWABLE CURTAILMENT AND GHG REDUCTIONS
FLEXIBLE RAM PI NG PROCUREMENT DIVERSITY SAVI NGS
coNcLUStoN...........
APPENDIX I : GLOSSARY OF ABBREV!AT|ONS.........
16
22
24
28
29
MPP/MA&F Copyright 2022 California ISO Page2ot 29
WEIM BENEFITS REPORT FIRST QUARTER 2022
EXECUTIVE SUMMARY
This report presents the benefits associated with
participation in the Western Energy lmbalance
Market (WEIM).
The measured benefits of participation in the WEIM
include cost savings, increased integration of
renewable energy, and improved operational
efficiencies including the reduction of
the need for real-time flexible reserves.
This analysis demonstrates the benefit of economic
dispatch in the realtime market across a larger
WEIM footprint with diverse resources and geography
Q12022 Gross Benefits by Participant
(milltons $)
$7.41
$1.e5
$18.58
$63.56
$6.29
$10.35
$4.41
$5.53
$26.40
$8.59
$3.s1
$3.85
$1.54
$3.60
$5.50
$0.15
$1.29
Total $172.31
Safib
City tlght
Toom
Porrr
Pdldnd
rFpbtdfrdqM?6lqtuew6t. W.o2O212*ar'E.,
2A22
Ql BENEFITS
Arizona Public Service
Avista
BANC
Califomia ISO
ldaho Power
LADWP
NV Energy
NorthWestem Energy
PacifiCorp
Portland General Electric
PNM
Puget Sound Energy
Powerex
Seattle City Light
Salt River Project
Tacoma Power
TID
Mo*rtOpmtr
I cqlibrniq Eo
ml^A.tlly
I latnp"rrap"*
I Pl6Bdaty2o22
! noma oq ZOZO
$2.10 billion
$172.31 M
40,304
54%
MPP/MA&F Copyright 2022 California ISO Page 3 of 29
WEIM BENEFITS REPORT FIRST QUARTER 2022
'WEIM Quarterly Benefit Report Methodology: httos:/Arvww.westerneim.com/Documents/ElM-BenefitMethodoloov.odf.
'The GHG emission reduction reported is associated with the avoided curtailment only. The cunent market process and
counterfacfual methodology cannot differentiate the GHG emissions resulting from serving ISO load via the EIM versus dispatch that
would have occuned extemal to the ISO wi$rout the WEIM. For more details, see
htto://www.caiso.com/Documents/GreenhouseGasEmissionsTrackinoReoort-FreouentlvAskedQuestions.odf
I BACKGROUND
The Western EIM began financially binding operation on Novembet 1,2014 by optimizing
resources across the ISO and PacifiCorp Balancing Authority Areas (BAAs). NV Energy began
participating in December 2015, Arizona Public Service and Puget Sound Energy began
participating in October 2016, and Portland General Electric began participating in October
2017. ldaho Power and Powerex began participating in April2018, and the Balancing Authority
of Northern Califomia (BANC) began participating in April 2019. Seattle City Light and Salt River
Project began participating in April 2020.
ln 2021, new balancing authorities began participating in the Westem ElM, with the Turlock
lrrigation District (TlD) in March 2021, the second phase of BANC in March 2021, and the Los
Angeles Department of Water and Power (LADWP) and Public Service Company of New
Mexico (PNM) in April 2021, followed by NorthWestem Energy (NWMT) starting in June 2021.
Avista Utilities (AVA) and Tacoma Power (TPWR), two utilities serving a combined 600,000
electric customers in the Pacific Northwest, became the newest members of the WEIM, with
both beginning their participation on March 2,2022.
The Western EIM footprint now includes portions of Arizona, California, ldaho, Montana,
Nevada, New Mexico, Oregon, Utah, Washington, Wyoming, and extends to the border with
Canada.
I WEIM ECONOMIC BENEFITS IN Q1 2022
Table 1 shows the estimated WEIM gross benefits by each region per monthl. The monthly
savings presented show $51.55 million for January, $54.31 million for February, and $66.45
million for March with a total estimated benefit of $172.31 million for this quarter2. This level of
WEIM benefits accrued from having additionalWElM areas participating in the market and
economical transfers displacing more expensive generation.
I The WEIM benefits reported here are calculated based on avaihbb data. lntervals without complete data are
excluded in the calculation. The intervals excluded due to unavailable data are normally within a few percent
points of the total intervals.
2 For several quarterly estimates, CAISO benefits were calculated on a variation of the counterfactual
methodology. For CAISO only the logic had considered offline resources as part of the bid stack in the
counterfactual. ln Q4 2021, CAISO identified some guestionable results that drove persistent negative benefits
for CAISO when considering offline resouroes. Since Q4 2021, the benefit calculation for CAISO area follows
the same methodology applicable to all WEIM entities in which only online resources are used.
MPP/MA&F Copyright 2022 California ISO Page 4 of 29
WEIM BENEFITS REPORT FIRST QUARTER 2OZI
Region January February March Total
APS
AVA
BANC
crso
tPco
LADWP
NVE
NWMT
PAC
PGE
PNM
PSE
PWR)(
sct
SRP
TID
TPWR
Total
TABLE 1: Q1 202i2 benefits ln mllllons USD
I cUMUueTuE ECONOIIIC BENEFITS SINCE INCEPTIoN
Since the start of the WEIM in November 2014, the cumulative economic benefits of the market
have totaled $2.10 billion. The quarterly benefits have grown over time as a result of the
participation of new BAAs, which results in benefits br both the individual BAA but also
compounds the beneftts to adjacent BAAs through additional transfers. The ISO began
publishing quarterly WEIM benefit reports in Apri!2015.3
Graph 1 illustrates the gross economic beneffts of the WEIM by quarter for each participating
BAA.
3 Prior reports are available at httos:/Aruww.westemeim.com/Paoes/AbouUQuarterlvBenefits.asox
MPP/MA&F Copyrlght 2022 Californla ISO pase s of 29
$1.95 $1.95
$15.03 $1e.66 $28.87 $63.56
$2.81 $4.25 $3.2e $10.35
$1.91 $1.73 $1.8e $5.53
$2.67 $3.23 $2.69 $8.59
$1.68 $0.e7 $1.20 $3.85
$1.55 $1.06 $0.e9 $3.60
$0.34 $0.36 $0.59 $1.29
$51.55 $54.31 $66.45 $172.31
WEIM BENEFITS REPORT FIRST QUARTER 2022
$350
$300
$250
s2m
$
$100
50
s50
ltCo
=.I
oCooooo
o
$2.0
$0 I I lhlrl
ol
$1.s eI
to
0
$1.0 Egto
$0.5 !J
E
=u
$0.004 al 02 03 04 01 Q2 03 Q4 0t 02 03 04 01 02 03 Q4 01 02 03 04 01 Q2 A3 04 01 Q2 03 04
m14 20't5 2016 2017 2018 2019 2!20 2021
rCISO IPAC TNEVP TPSEI IAZPS
IPGE TIPCO IPWRX TBAI\G ISCL
n2.
msRP ITID i. ,LAD\A/P IPNM m:N\A/frrlT
-AVA -TPWR -Cumulative
Benelits
GRAPH 1: Cumulative economic benefits for each quarter by BAA
I INTER.REGIONAL TRANSFERS
A significant contributor to EIM benefits is transfers across balancing areas, providing access to
lower cost supply, while factoring in the cost of compliance with greenhouse gas (GHG)
emissions regulations when energy is transferred into the lSO. As such, the transfer volumes
are a good indicator of a portion of the benefits attributed to the WEIM. Transfers can take place
in both the 1S-Minute Market and Real-Time Dispatch (RTD).
Generally, transfer limits are based on transmission and interchange rights that participating
balancing authority areas make available to the WEIM, with the exception of the PacifiCorp
West (PACW) -lSO transfer limit and the Portland General Electric (PGE) -lSO transfer limit in
RTD. These RTD transfer capacities between PACWPGE and the ISO are determined based
on the allocated dynamic transfer capability driven by system operating conditions. This report
does not quantiff a BAA's opportunity cost that the utility considered when using its transfer
rights for the ElM.
Table 2 provides the 1S-minute and S-minute WEIM transfer volumes with base schedule
transfers excluded. The WEIM entities submit inter-BAA transfers in their base schedules. The
benefits quantified in this report are only attributable to the transfers that occurred through the
WEIM. The benefits do not include any transfers attributed to transfers submitted in the base
schedules that are scheduled prior to the start of the ElM.
The transferfrom BAA_x to BAAj and the transferfrom BAAJ to BAA_x are separately
reported. For example, if there is a 100 Megawatt-Hour (MWh) transfer during a S-minute
interval, in addition to a base transfer from ISO to NVE, it will be reported as 100 MWh
from_BAA ISO to_BAA NEVP, and 0 MWh from_BAA NEVP to_BAA ISO in the opposite
MPP/MA&F Copyright 2022 California ISO Page 6 of 29
WEIM BENEFITS REPORT FIRST QUARTER 2022
direction. The 1S-minute transfer volume is the result of optimization in the 1S-minute market
using all bids and base schedules submitted into the WEIM. The S-minute transfer volume is the
result of optimization using all bids and base schedules submitted into WEIM, based on unit
commitments determined in the 1S-minute market optimization. The maximum transfer
capacities between WEIM entities are shown in Graph 2 below.
Month From BAA To BAA
l5min WEIM transfer
(15m - base)
Smin WEIM transfer
(5m - base)
AZPS ctso 118,743 72,202
AZPS LADWP 17,593 19,952
AZPS NEVP 5,240 5,947
AZPS PACE 18,980 38,259
AZPS PNM 39,390 38,395
AZPS SRP 26,147 24,154
BANC ctso 6,501 2,743
BANC TIDC 22 88
ctso AZPS 35,068 51,172
CISO BANC 87,894 123,607
crso LADWP 32,U5 41,818
crso NEVP 57,698 75,616
ctso PACW 11,572 38,255
CISO PGE 15,777 32,445
crso PWRX 32,316 45,374
crso SRP 38,033 52,578
crso TIDC 9,917 13,189
tPco NEVP 35,809 14,639
tPco NWMT 2,198 2,108
tPco PACE 6,504 2,754
!PCO PACW 24,319 20,997
rPco PSEI 0 0
rPco SCL 2,955 3,196
January
MPP/MA&F Copyright 2022 California ISO Page 7 of 29
WEIM BENEFITS REPORT FIRST QUARTER2OZI
LADWP AZPS 2,499 2,983
LADWP NEVP 7,7M 13,365
NEVP AZPS 697603
NEVP tPco 88,744 109,290
NEVP PACE 14,381 17,2il
NWMT PACE 6,560 3,857
48NWMTPGE2
PACE AZPS 54,58366,803
PACE LADWP 101,746 79,610
PACE 22,3ffiNWMT16,41
PACE SRP 0 0
PACW tPco 39,803 36,397
PACW PGE 31,998 26,535
PACW SCL 843 808
January
MPP/MA&F Copyright 2022 California ISO Page 8 of 29
WEIM BENEFITS REPORT FIRST QUARTER 2022
PGE NWMT 126 70
PGE PSEI 0 0
PNM AZPS 19,222 18,520
PSEI tPco 0 0
PACW 47,747 50,679PSEI
PSEI PWRX 13,773 15,743
PWru(crso 0 0
lPco ,80311SCL 11,429
SCL PGE 1,580 1,780
SRP AZPS 33,808 27,M2
SRP PACE 0 0
BANC 15 88TIDC
CISO 64,740 33,432AZPS
AZPS NEVP 2,979 6,546
February
MPP/MA&F copyright 2022 callfomla lso Page 9 of 29
WEIM BENEFITS REPORT FIRST QUARTER 2OZI
AZPS PNM 33,789 36,984
BANC crso 5,393 2,879
oso AZPS 91,629 90,u2
clso LADWP 93,651 111,393
clso PACW 8,025 25,307
crso PWRX 50,574 63,110
ctso TIDC 6,634 8,786
tPco NWMT 3,549 3,519
IPEO PACW 13,523 1 15,42
tPco SCL 3,639 4,237
LADWP crso M,404 27,577
LADWP PACE 20,430 21,959
NEVP crso 64,069 28,650
NEVP LADWP 24,8U 23,174
February
MPP/MA&F Copyright 2022 Califomia lSO Page 10of29
WEIM BENEFITS REPORT FIRST QUARTER 2022
NWMT IPCO 8,047 7,862
NWMT PACE 4,896 3,244
NWMT PACW 54 13
NWMT PGE 6 50
NWMT PSEI 8 30
PACE AZPS il,346 55,733
PACE tPco 66,977 71,276
PACE LADWP 69,256
50,173
59,490
PACE NEVP 32,607
PACE NWMT 15,196 17,340
PACE PACW 12,210 13,675
PACE SRP 0 0
PACW crso 44,430 9'1,933
PACW rPco u,274 32,700
PACW NWMT 0 6
PACW PGE 25,339 21,244
PACW PSEI 27,220
1,347
27,962
PACW SCL 1,199
PGE ctso 46,152 35,837
PGE NWMT 1 49
PGE PACW 32,444 45,060
PGE PSEI 0 0
PGE SCL 1,542 1,557
PNM AZPS 24,075 20,191
PNM SRP 5,260 4,259
PSEI tPco 0 0
PSEI NWMT 1 29
PSEI PACW 29,025 32,855
February
MPP/MA&F Copyright 2022 California ISO Page 11 of 29
WEIM BENEFITS REPORT FIRST QUARTER 2022
PSEI PGE 0 0
PSEI SCL 30,478 30,119
PWRX PSEI ,20011 1 1,315
SCL PACW 685 907
SCL PSE!6,165 6,049
SRP crso 8[,897 40,795
SRP PNM 1,072 2,058
TIDC ctso 8,730 5,714
AVA tPco 41,079 30,694
AVA PACW 492 934
AVA PSE!2 42
AZPS crso 118,636 60,827
AZPS NEVP 3,359 4,346
AZPS PNM 36,302 40,678
March
MPP/MA&F Copyright 2022 California ISO Page 12 of 29
WEIM BENEFITS REPORT FIRST QUARTER 2022
BANC crso 9,468 4,768
AVA 0 0crso
BANCctso 135,926 151,421
crso NEVP 155,740 1g),858
PGE 23,431 49,823crso
crso SRP 71,743 82,831
tPco AVA 6,766 11,113
NWMT 3,196 4,2U!PCO
PACWtPco 14,394 22,587
tPco SCL 3,515 5,295
LADWP crso 35,241 24,140
LADWP PACE 7,525 8,585
crso 127,997 56,105NEVP
LADWPNEVP 51,570 45,541
March
MPP/MA&F Copyright 2022 Californla ISO Page 13 of 29
WEIM BENEFITS REPORT FIRST QUARTER 2022
NWMT AVA 18,172 27,943
NWMT PACE 17,012 10,016
NWMT PGE 62 85
PACE AZPS '117,183 u,121
PACE LADWP 26,324 22,494
PACE NWMT 22,459 33,316
PACE SRP 0 0
PACW crso 37,988 79,115
PACW NWMT 0 3
PACW PSE!27,452 41,994
PGE AVA 0 63
PGE NWMT 48 48
PGE PSEI 0 0
PGE TPWR 32 60
March
MPP/MA&F copyright 2022 california lso Page 14 of 29
WEIM BENEFITS REPORT FIRST QUARTER 2022
PNM SRP 4,832 2,788
PSEI tPco 0 0
PACW 32,839 33,619PSEI
PSEI PWRX 18,220 20,675
PSEI TPWR 4,539 5,345
PSEI 8,828PWRX9,950
SCL tPco 12,814 10,554
PGE 1,480 1,364SCL
SRP AzPS 4,890 8,533
SRP PACE 0 0
TIDC BANC 4,112 2,716
TPWR PGE 1 31
TABLE 2: Energy transfers (lulwh) in the FHM and RTD martets tor Q12022
MPP/MA&F Copyrlght 2022 Califomia ISO Page 15 of29
WEIM BENEFITS REPORT FIRST QUARTER 2022
Elftmtd rrior
Cop".,ly [fW
PoA 24 b 100
35.90
Eldomdo
PoA 35 frcsl lo msfl 580
Pofi 35 Ieor, lc west|538
Gonderfwont 130
PACW tO PGE 320
Poth 66 627
2%66
66
Poth66 (PACW tc.lSO)t32
Poth | 7 o-400r ?
M66 PSE b PACW 300
Eldorcdo 5O0Monkopi 732
Polo N. Gilo 3J9l
625
,o 660
5n
^.t€od
230 IAPS <-> lSO, 236
tt md 230 /,SO b NI4, 3,113
Mmd 230 lNt/f,'r,SO, 3,176
lrcO b PACW (Po$ 751 1,500@
PACE b lrcO 2,557m
8&ro&NVE blrcO 262
hbk,IrcO b NVE 390-178
Powerex <-> PSE r50
Pryerox <-> ISO r50
+one dirclion e bklircctionol
I Colilornio ISO I tADwP
I eocilidorp f Public Seruice Compony ol New A,iaxico
I NV E*rgy ! Turlmt lrigotin Dishkl
! Arizono Public Service ! North\Abslcrn Encrgy
! Poalond C*mrol Elechic ! Avislo
! Puget Sound Energy ! Tuco Ebctrk Pomr (ar'y 2022)
! tdoho Power Compony ! Tocomo Pmr
! Powcrcx ffi Bonneville Pomr Adminishotion lcnry 20221
I BANC ! El Porc Electic lenry 2023)
S€orle Ciry Lighr I WAPA Dasrr Sodhwesl (eary 2023)
* Solt Riw Proiea
Nd.r Ar,b A Io@ potfi t will bc o&d w. Cutrel o, d A$il 2022
GRAPH 2: Estimated maximum transfer capacity
I WHEEL.THROUGH TRANSFERS
As the footprint of the WEIM grows, wheel-through transfers may become more common. ln
order to derive the wheel-through transfers for each WEIM BAA, the ISO uses the following
calculation for every real-time interval dispatch:
Total impofti summation of transfers above base transfers coming into the WEIM
BAA under analysis
Total export: summation of all transfers above base transfers going out of the WEIM
BAA under analysis
797
BANC <-> ISO 2,000.4,000
IID b lso 1,400
IID ic 8ANC 650
Poth 48 2,t00
SRP <-> IErc 9,988
SRP <-> PNM 400
SRP <-> AZPS .r 0,o2l
14,488sRP <-> tso
sRP <-> IDWP 349
I b on c,,t@ol .Eth 06.10&. & PACEPACW E!,^r rcn'jryt md $c
coFciry i' a sbd ol PACEIPCOIPCO.f.IICE ond Potl 75 copocity.
1 Wlrn in ur, r$o mil&c ag.ity a PACEIPCO/K.O?\CE ood
Pok 75 will b s!{qontly rodtcod by ko urd o@ont q Poth 17,
O
a
MPP/MA&F Copyright 2022 California ISO Page 16 of 29
WEIM BENEFITS REPORT FIRST QUARTER 2022
Net impoft: the maximum of zero or the difference between total imports and total
exports
Net export: the maximum of zero or the difference between total exports and tota!
imports
Wheel-through: the minimum of the WEIM transfers into (total import) or WEIM
transfer out (total export) of a BAA for a given interval
Allwheel-through transferc are summed over both the month and the quarter.
Currently, a WEIM entity facilitating a wheel through receives no direct financial benefit for
facilitating the wheel; only the sink and source directly benefit. As part of the WEIM
Gonsolidated lnitiatives stakeholder process, the lSO committed to monitoring the wheel
through volumes to assess whether, after the addition of new WEIM entities, there is a potential
future need to pursue a market solution to address the equitable sharing of wheeling benefits.
The ISO will continue to track the volume of wheel-through transfers in the WEIM market in the
quarterly reports.
This volume reflects the total wheel-through transfers for each WEIM BAA, regardless of the
potential paths used to wheelthrough. The net imports and exports estimated in this section
reflect the overallvolume of net imports and exports; in contrast, the imports and exports
provided in Table 2 reflect the gross transfers between two WEIM BAAs.
The metric is measured as energy in MWh for each month and the conesponding calendar
quarter, as shown in Tables 3 through 6 and Graphs 3 through 6.
BAA Net Export Net lmport WheehThrough
AVA
AZPS
BANC
ctso
tPco
UDWP
NEVP
NWMT
PACE
PACW
a
a
a
166,484 200,973 4LL,2O5
t,638,892 5L7,L73 34L,873
70,422 422,855 130,605
40,301 65,558 3L,625
2t9,342 152,824 310,904
MPP/MA&F Copyright 2022 California ISO Page 17 of 29
WEIM BENEFITS REPORT FIRSTQUARTER2O2
67,062 L20,243 M6
L7,74O 234,29L L4,27O
L6L,794 268,7t3 4,590
6,4L2 5,343 62
P6E
PNM
PSEI
PWRX
scl.
sRP
TIDC
TPWR
TABLE 3: Estlmated wheehthrough transfera in Ql 2022
==
C'
g
lrJ
2,0m.000
I,E00,000
1,6@,000
1,'100,000
1,200,000
1,000,000
800,000
600,000
400,000
200,000
0 lllr.ll llrrlrl
*td"$ "e et5,s *"nS$oo&o.d e* e* e"uS- od .eq ^.d{s
rNet Exporl rNet lmport rWheclThmugh
I
GRAPH 3: Estlmated whee!-through transfers ln Ql202ll
BAA Net Export Net lmport Ulfheel-Through
AZPS
BANC
ctso
2,7M 123,608 87
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WEIM BENEFITS REPORT FIRST QUARTER 2022
L7,L7L 24L,249 26,523
50,033 59,702 123,561
307,6LL 36s19 40,037
47,549 4L,692 L9,LL7
61,849 L7,362 28,924
2L,8t6 22,il8 6,757
13,190 865,788
tPco
LADWP
NEVP
NWMT
PACE
PACW
PGE
PNM
PSEI
PWil(
scI.
SRP
TIDC
TABLE 4: Estimated wheel-through transfers in January 2022
s
==
Pa,c
IJJ
900,0m
800,000
700,0m
000,0m
500,0m
400,0m
300,000
200,000
loo,ooo I I trrrrrlll
#f .St o8 <doo$ *d n$ ..&."." .t' ..* .e' dd eo' uQQ ^.d
rNet Export rNqt lnport r\Mteel Through
GRAPH 'l: Estimated whee!-through transfers ln January 2022
MPP/MA&F Copyright 2022 Califomla ISO Page 19 of 29
WEIM BENEFITS REPORT FIRST OUARTER 2022
2,935 LL7,374 98
22,L28 L87,L27 22,540
45,735 54,254 L28,992
2@,ffig 61,587 40,513
62,800 33,131 L9,702
47,6L6 L4,27O 31,087
11,659 29,2L2 7,90L
8,2L8 8,840 99
BAA Net Export Net lmport Wheel-Through
AZPS
BANC
ctso
tPco
IAD:WP
NflTP
NWMT
PACE
PACW
PGE
PNM
PSEI
PWil(
scL
SRP
TIDC
TABLE 5: Estimated wheel-through transfers in February 20Zl
MPP/MA&F Copyright 2022 Glifomia ISO Page 20 of29
WEIM BENEFITS REPORT FIRST QUARTER 2022
900,000
800,000
700,000
000,000
$ soo,ooo
I +oo,oooPofi 30o,ooo
200,000 llrloo,ooo I I TIIIIIT
pf .St .f" s8ooso ."n S$ ."& -... €" ..$ €o dd uo' ed
^.t"
r Net Export rNet lmport t\Mreel Through
GRAPH 5: Estimated whee!-through transfers inFebruary 2022
BAA Net Export Net lmport WheehThrough
AVA
AZPS
BANC
ctso
lPco
IADWP
NEVP
NWMT
PACE
PACW
PGE
PNM
PSEI
5L,264 77,8O1 188,234
773,O7O til,u3 107,953
18,477 t72,730 22,074
L5,942 2L,763 29,gOL
82,333 55,ML 1L8,LOz
23,957 40,904 22t
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WEIM BENEFITS REPORT FIRST QUARTER 2022
PWRX
sc[
SRP
TIDC
TPWR
TABLE 6: Estimated wheel-through transfers inMarch2022
3
=
EDotr
IJJ
900,0m
800,0m
700,0m
600,0m
500,000
400,000
300,000
200,000
100,0m
0 rlts III llrrlrl
d"pe"tso d u'S* -r-.s.$.€tod o& e$."odd .d uea ^..t^.$"
tNet Export I Net lmport r\Meel Through
GRAPH 6: Estimated whee!-through transfers in March 2022
I REDUCED RENEWABLE CURTAILMENT AND GHG REDUCTIONS
The WEIM benefit calculation includes the economic benefits that can be attributed to avoided
renewable curtailment within the ISO footprint. lf not for energy transfers facilitated by the
WEIM, some renewable generation located within the ISO would have been curtailed via either
economic or exceptional dispatch. The total avoided renewable curtailment volume in MWh for
Q1 2022 was calculated to be 18,160 MWh (January) + 29,740 MWh (February) + 46,268 MWh
(March) = 94,168 MWh total.
There are environmental benefits of avoided renewable curtailment as well. Under the
assumption that avoided renewable curtailments displace production from other resources at a
default emission rate of 0.428 metric tons COz/MWh, avoided curtailments displaced an
estimated 40,304 metric tons of COz for Q1 2022. Avoided renewable curtailments also may
4,108 103,915 4,72O
30,015 tog,757 2,L67
6,4L2 5,343 62
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WEIM BENEFITS REPORT FIRST QUARTER 2022
have contributed to an increased volume of renewable credits that would otheruise have been
unavailable. This report does not quantrfl the additionatvalue in dollars associated with this
benefit. Total estimated reduc'tions in the curtailment of renewable energy in the ISO footprint,
along with the associated reductions in COz, are shown in Table 7.
Year Quarter IrlUrh Eq. Tons COz
2015
2016
2017
20r8
2019
2020
3,629 1,553
7,52',a17,765
158,806 67,969
10,01123,390
67,055 28,700
18,060
129,128 55,267
10,02623,425
132,937 56,897
35,254 15,089
147,514 63,136
39,956 17,101
109,059 46,677
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WEIM BENEFITS REPORT FIRST QUARTER 2022
4 38,044 16,283
1 94,168 40,304
1,664,368 712,270
2022
Total
TABLE 7: Total reduction in curtailment of renewable energy and associated reductions in COz
I FLEXIBLE RAMPING PROCUREMENT DIVERSITY SAVINGS
The WEIM facilitates procurement of flexible ramping capacity in the FMM to address variability
that may occur in the RTD. Because variability across different BAAs may happen in opposite
directions, the flexible ramping requirement for the entire WEIM footprint can be less than the
sum of individual BAA's requirements. This difference is known as flexible ramping procurement
diversity savings.
Starting in 2016, the ISO replaced the flexible ramping constraint with flexible ramping products
that provide both upward and downward ramping. The minimum and maximum flexible ramping
requirements for each BAA and for each direction are listed in Table 8.
Month BAA Direction Minimum
requirement
Maximum
requirement
AZPS up z',|'251
BANC up B 120
c,so up 209 2,437
tPco up 30 140
LADWP up 38 295
NEVP up '17 328
NWMT up 26 156
PACE up 146 612
222PACWup57
PGE up 64 212
PNM up 31 148
PSE/up 51 192
PWRX up 82 366
scr up
up
7 45
SRP 14 1 51
TIDC up 2 14
ALL EIM up 390 2,917
January
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WEIM BENEFITS REPORT FIRST QUARTER 2022
down 6 278AZPS
crso down 57 1,577
LADWP down 28 272
NWMT down 39 159
PACW down 43 232
PNM down 41 161
PWRX down 72 339
SRP down 16 207
ALL EIilI down 221 2,021
up I 120BANC
tPco up 39 150
NEVP up 23 337
up 112 463PACE
PGE up 43 212
PSE'up 38 187
scL up 8 44
January
February
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WEIM BENEFITS REPORT FIRST OUARTER 2022
nDc up 2 14
AZPS down 22 254
crso down 54 1,577
IADWP down 51 272
NWMT down 35 159
PACW down 38 232
PNM down 36 150
PWRX dorvn 93 339
SRP down 22 170
ALL EIM down 2U 2,021
AZPS up 32 286
crso up 28',1 2,120
IADWP up 37 315
NWMT up 26 115
PACW up 47 222
February
March
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WEIM BENEFITS REPORT FIRST QUARTER 2022
319PWRX
SRP
TPWR
AVA down
BANC down
tPco down 223
NEVP down
PACE down 470
PGE down 219
PSE/down
scr down
TIDC down
ALL WEIM down 283 2,122
March
Table 8: Flexible ramping requirements
The flexible ramping procurement diversity savings for all the intervals averaged over the month
are shown in Table 9. The percentage savings is the average MW savings divided by the sum of
the individual BAA requirements.
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WEIM BENEFITS REPORT FIRST QUARTER 2022
Up Down Up Down Up Down
1,247 1,229 1,236 1,246 1,317 1,350
2,487 2,148 2,364 2,217 2,488 2,370
50%57%52%s6%53Yo 57o/o
January February March
Direction
Average MW saving
Sum of BAA requirements
Percentage savrngs
Table 9: Flexible ramping procurement diversity savings in Ql 2022
Flexible ramping capacity may be used in RTD to handle uncertainties in the future interval. The
RTD flexible ramping capacity is prorated to each BAA. Flexible ramping surplus MW is defined
as the awarded flexible ramping capacity in RTD minus its share, and the flexible ramping
surplus cost is defined as the flexible ramping surplus MW multiplied by the flexible ramping
WEIM-wide marginal price. A positive flexible ramping surplus MW is the capacity that a BAA
provided to help other BAAs, and a negative flexible ramping surplus MW is the capacity that a
BAA received from other BAAs.
The EIM dispatch cost for a BAA with positive flexible ramping surplus MW is increased
because some capacities are used to help other BAAs. The flexible ramping surplus cost is
subtracted from the BAA's WEIM dispatch cost to reflect the true dispatch cost of a BAA. Please
see the Benefit Report Methodology for more details.
I CONCLUSION
Using state-of-the-art technology to find and deliver low-cost energy to meet real-time demand,
the WEIM demonstrates that utilities can realize financial and operational benefits through
increased coordination and optimization. ln addition to these benefits, the WEIM provides
significant environmental benefits through the reduction of renewable curtailments during
periods of oversupply.
Sharing resources across a larger geographic area reduces greenhouse gas emissions by using
renewable generation that otherwise would have been turned off. The quantified environmental
benefits from avoided curtailments of renewable generation from 2015 to-date reached 712,270
metric tons of COz, roughly the equivalent of avoiding the emissions from 149,752 passenger
cars driven for one year.
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WEIM BENEFITS REPORT FIRST QUARTER 2022
APPENDIX 1: GLOSSARY OF ABBREVIATIONS
Abbreviation
APS Arizona Public Service
AVA Avista Utilities
BAA Balanci Area
BANC Balanci
crso rso
EIM
FMM
GHG
tPco
LADWP
MW
MWh
NVE
PAC
PACE
PACW
PGE
PSE
PWRX
RTD
SCL
SRP
TID
TPWR
WEIM
Califomia ISO
lmbalance Market
Fifteen Minute Market
Greenhouse Gas
ldaho Power
Los
of Northern California
of Water and Power
NV
-Hour
East
West
Portland General Electric
Sound
Powerex
RealTime
Seattle
Salt River
Turlock I District
Tacoma Power
Western Energy lmbalance Market
MPP/MA&F Copyright 2022 California ISO Page2g ot 29