20221110Quarterly Report.pdf

sEm.
RICEIVED
?il?? HilY IO AH 9:09
,i),\l iri iruBLic
i ifi'. : t':OULltSStOt't
An EAGOTP Cotnp.ny
LISA O'HARA
Gorporate Counsel
lo'[e-mail]
November 10,2022
Ms. Jan Noriyuki
Secretary
ldaho Public Utilities Commission
PO Box 83720
Boise, lD 83720-0074
Re Case No. IPC-E-I6-19
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. !PC-E-16-19, ldaho Power Company
("ldaho Power" or "Company") hereby submits the quarterly CAISO Western EIM Benefits Report
('Report') for the third quarter of 2022. The Report presents CAISO's quantification of benefits
associated with participation in the Western ElM. For the third quarter of 2022, CAISO estimated
Western EIM gross benefits of $12.04 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,
Xrr,* (i'W-
Lisa J. O'Hara
Enclosure
Western Energy Imbalance Market Benefits
Third Quarter 2022
October 31, 2022
WEIM BENEFITS REPORT THIRD QUARTER2022
CONTENTS
EXECUTIVE SUMMARY
BACKGROUND .........
WEIM ECONOMIG BENEFITS IN Q3 2022.........
CUMULATIVE ECONOMIC BENEFITS SINCE INCEPTION
INTER.REG IONAL TRANSFERS ......
WHEEL-THROUG H TRANSFERS..........
REDUCED RENEWABLE CURTAILMENT AND GHG REDUCTIONS............
3
4
4
5
6
FLEXIBLE RAII' PI NG PROC U RE M E NT DTVE RSITY SAVING S
CONCLUSION.
APPENDX 1: GLOSSARY OF ABBREVIATIONS
22
29
3l
36
37
MPP/MA&F Copyright 2022 California ISO Page 2 of 37
WEIM BENEFITS REPORT THIRD QUARTER2022
$2.91 billion
EXECUTIVE SUMMARY
This report presents the benefits associated with
participation in theWestem Energy lmbalance
Market (WEIM).
The measured benefits of participation in theWE|M
include coat savings, increased integration of
renqrable energy, and improved operational
efficiencies including the reduction of
the need for real-time flexible reseryes.
This analysis demonstrates the benefit of economic
dispatch in the real time market across a larger
WEIM footprint with diverse resources and geography.
Q32022 Gross Benefits by Participant
lmillions $)
$36.42
$7.24
$111.54
$e.07
$65.99
$12.04
$25.79
$62.38
$6.84
$84.54
$19.64
$16.63
$7.5e
$2.76
$3.67
$19.28
$3.84
$26.88
$4.s2
Total $526.51
sdL
C[y lld'l
&ffid@dbtuwo*@
2022
Q3 BENEFITS
Arizona Public Service
Avista
BANC
BPA
California ISO
ldaho Porer
LADWP
NV Energy
NorthWestern Energy
PacifiCorp
Portland General Electric
PNM
Puget Sound Energy
Powerex
Seattle City Light
Salt River Proiect
Tacoma Power
TEP
TID
ffafi Opr*.Icdcmtuo
lln$ r$ly! farporxpot
! aonca*y zozr
$526.51 M
18, 176
61%
MPP/MA&F Copyright 2022 California ISO Page 3 of 37
WEIM BENEFITS REPORT THIRD QUARTER 2022
"WEIM Quarterly Benelit Report Methodology: httos://www.westerneim.com/Documents/E lM-BenefitMettrodoloov.odf .
"The GHG emission reduction reported is associated with the avoided curtaihnent only. The cun€nt market process and
counterfactual methodology canmt differentiate the GHG emissions resulting from servirg ISO bad via the EIM versus dispatch that
r,rould have occlrred external to the ISO without the WEIM. For more details, see
htto://www.caiso.com/Documents/Greenho useG asEmissio nsTrackinoReoo rt-Freo uentlvAskedQ uestio ns.odf
I BACKGROUND
The Western EIM began financially binding operation on November 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 Porer and Po,verex began participating in April 2018, and the Balancing Authority
of Northem Califomia (BANC) began participating in Apri! 2019. Seattle City Light and Salt River
Project began participating in April 2020.
ln 2021, nsr balancing authorities began participating in the Westem ElM, with the Turlock
lnigation District (TlD) in March 2021, the second phase of BANC in March 2021, and the Los
Angeles Department of Water and Pourer (LADWP) and Public Service Company of New
Mexico (PNM) in April 2021, tollwed by NorthWestem Energy (NWMT) starting in June 2021.
Avista Utilities (AVA) and Tacorna Ponrer (TPWR), two utilities serving a combined 600,000
electric cus{omers in the Pacific Northwest, became the neurest mernbers of the WEIM, with
both beginning their participation on March 2,2022. On May 3,2022, the Bonneville Power
Administration (BPA) and Tucson Electric Power (TEP) both Joined the WEIM.
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 Q3 2022
Table 1 shors the estimated WEIM gross benefits by each region per monthl. The monthly
savings presented shorv $141.35 million for July, $175.44 million for August, and $209.72
million for September with a total estimated benefit of $526.51 million for this quarter2. This level
of WEIM benefits accrued from having additional WEIM areas participating in the market and
econom ical transfers displacing more expensive generation.
1 The WEIM benefits reported here are calculated based on available 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 questionable results that drove persistent negative benefits
for CAISO when considering offline resources. Since Q4 2021,hhe 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 37
WEIM BENEFITS REPORT THIRD QUARTER2022
Region July August September Total
APS
AVA
BANC
BPA
c,so
tPco
IADWP
NVE
NWMT
PAC
PGE
PNM
PSE
PWRX
sct
SRP
TPWR
TEP
TID
Total
TABLE 1: Q32022 benefits in millions USD
I CUMULATIvE EcONoMIG BENEFITS sINcE INcEPTIoN
Since the start of the WEIM in November 2014, the cumulative economic benefits of the market
have totaled $2.91 billion. The quarterly benefits have grown over time as a result of the
participation of neur BAAs, which results in benefits for both the individual BAA but also
compounds the benefits to adjacent BAAs through additional transfers. The lSO began
publishing quarterly WEIM benefit reports in April 2015.3
Graph 1 illustrates the gross economic benefits of the WEIM by quarter for each participating
BAA.
3 Prior reports are arrailable at httos://www.r,ttestemeim.com/Paqes/AbouUQuarterlvBenefits.asox
MPP/MA&F Copyright 2022 California ISO Pare s of 37
$0.e2 $2.33 $3.ee $7.24
$2.47 $1.81 $+.zg $9.07
$2.41 $3.56 $6.07 $12.04
$10.67 $20.42 $31.29 $62.38
$19.83 $29.33 $35.38 $84.54
$2.70 $3.80 $10.13 $16.63
$0.50 $0.70 $1.56 $2.76
$2.e1 $+.zg $11.58 $19.28
$6.19 $6.S2 $14.12 $26.88
$141.35 $175.44 $209.72 $526.51
WEIM BENEFITS REPORT THIRD QUARTER2022
6Eo
=-
IEoCoo!tseo
$600
$500
$400
$300
$200
$1m
$0
$
$
o3
hlq3 Ql
nrllrll03 01 03 0t
rll
o1
03.0
$2.5
$2.0
.5
.0
$0.5
$0.0
5Co
=o,
Gocl,a
a,
a
=Ea(JIrl03 0104 al 03
2014 2015
olo3ol
frz.2f.21nn2019?o172016
o3
2018
rCISOrAZPSIBANC
r=:,iLADWPrTPWR
IPAC
IPGErSCL
IPNM
'- BPA
rNEVPIIP@rSRP
:rns N\A/[rlT. TEP
rPSEI
IPWRXITIDrAVA
-Cumulative
Benefts
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 Rea!-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 PACW/PGE 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-minuteWElM 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 occuned through the
WEIM. The benefits do not include any transfers aftributed to transfers submitted in the base
schedules that are scheduled prior to the start of the ElM.
The transfer ftom BAA_x to BAA_y and the transfer ftom BAA3 to BAA_x are separately
reported. For example, if there is a 100 Megawatt-Hour ([l|Wh) transfer during a S-minute
interva!, in addition to a base transfer ftom ISO to NVE, it will be reported as 100 MWh
from BAA ISO to_BAA NEVP, and 0 ttMh ftom_BAA NEVP to_BAA ISO in the opposite
MPP/MA&F Copyright 2022 California ISO Page 6 of 37
WEIM BENEFITS REPORT THIRD QUARTER 2022
direction. The 15-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 15-minute market optimization. The maximum transfer
capacities between WEIM entities are shown in Graph 2 below.
Month From BAA To BAA
1Smin WEIM transfer
(15m - base)
Smin WEIM transfer
(5m - base)
AVA BPAT 4,287 2,169
AVA CISO 0 0
AVA !PCO 9,467 8,216
AVA NWMT 7,071 6,723
AVA PACW 2,6U 1,617
AVA PGE 23 0
AVA PSEI 0 0
AVA SCL 16 0
AVA TP\A'R 0 0
AZPS CISO 111,143 63,693
AZPS LADWP 9,350 9327
AZPS NEVP 2,638 4,757
AZPS PACE 17,424 28,600
AZPS PNM 50,174 57,898
AZPS SRP 41,553 33,295
AZPS TEPC 42,246
0
47,294
BANC BPAT 0
BANC CISO 3,944 5,031
BANC TIDC 139 0
BPAT AVA 6t 898 6,81 1
BPAT BANC 0 0
BPAT CISO 4,088 9,589
BPAT IPCO 372 55
July
July
MPP/MA&F Copyright 2022 California ISO PageT of 37
WEIM BENEFITS REPORT THIRD QIJA,RTER2Oz
LADIA'P 0 0BPAT
BPAT NI\A'MT 13,563 3,313
BPAT PGE 42,q)8 42,969
BPAT Pl,v$(4,381 0
BPAT TPIA'R 6,350 9,643
AZPS &1,583 86,952crso
ctso BPAT 1,458 2,114
cIso NEVP 37,916 59,924
FGE 5,239 23,912clso
crso SRP 80,498 107,934
ctso TIDC 7,072 7,916
tPco BPAT 2,124 130
t{trMT 1,615 1,755tPco
PAqAI 19,482 14,540rPco
July
MPP/MA&F Copyrlgtrt 2022 Callfornla ISO Page 8 of37
WEIM BENEFITS REPORT THIRD q'ARIER2OZ
rPco SCL 4,782 5,510
LADIA'P BPAT 00
LATMTP NEVP mJ23 29,,O21
LAT}WP TEPC 0 0
NEVP BPAT 0 0
NEVP tPco 38,578 61.322
NEVP PACE 21,017 22,W7
tIWMT EPAT 6,800 1,482
tl\,VMT PACE 2,161 1,411
TfWMT PGE 78 0
TIWMT TP\,VR 0 0
PACE tPco 79,ilo69,102
PACE NEVP 68,7M 47,U7
PACE PAGW 42,8ffi 50,124
July
MPP/MA&F Coffight 2022 Caltforr{a ISO Page 9 of37
WEIM BENEFITS REPORT THIRD QIJARTER2OZ2
PACE TEPC 4,531 4,251
BPAT 5,421 1,831PACW
PAO,V tPco 17,769 11,637
PAGA'PGE 4,907 #,u2
PAO/I'SCL 1,O22 983
PGE BPAT 17,891 20,275
PGE t\twMT 54 0
PGE PSEI 0 0
PGE TR,\IR 1 0
SRP 7,511 1 186,PNM
PSEI AVA 0 0
PSEI tPco 0 0
PSEI PACW 3 0
PSEI n rRx 16,808 17,224
JUU
MPP/MA&F Copyrlght 2022 Gllfornla lS0 Page 10of37
WEIM BENEFITS REPORT THIRD QI,ARTER2OZz
12,42PSEITP\fT,R 11,2',18
P\ fru(crso 0 0
SCL AVA I 0
7,498 7,211scLtPco
scL PGE 1,52 1,676
SRP AZPS 9,575 9,812
PACE 0 0SRP
SRP TEPC 49,231 56,9&[
TEPC crso 28,437 18,6ff1
TEPC PACE 654 247
4,914TEPCSRP4,2%
TIDC cIso 14,925 13,664
Tn /R BPAT 4,512 4,975
TF{A'R PGE o 0
MPP/MA&F Copyrisht 2022 Gllfomia ISO Page 11 of 37
WEIM BENEFITS REPORT THIRD (f,,|ARTER2OZI
AVA BPAT 4,749 3,178
AVA tPco 16,711 16,925
AVA PACW 1,489 1,755
AVA PSEI 0 0
AVA TPWR 46 80
AZPS LADIA'P 9,973 9,821
AZPS PACE 15,325 12,656
AZPS SRP 34,289 28,488
BANC BPAT o 0
TIDC 59 0BANC
BPAT BANC 0 0
BPAT tPco 393 33
BPAT NE\IP 0 0
BPAT PAOA/2,ffi4 1,809
Augusl-
Augu.#
MPP/MA&F Copyright 2022 Callfornla ISO Page 12 of37
WEIM BENEFITS REPORT THIRD QUARTER 2022
BPAT PSEI 10,251 11,372
,BPAT HA/RX 4,757
BPAT SCL 1 838 1,335
BPAT TPi/'/R 8,129 9,806
ctso AVA 0 0
crso AZPS 8,805 17,526
crso BANC 180,069 194,375
crso BPAT 2,294 3,935
CISO LADWP 1 5,I41 25,640
ctso NEVP 9,784 13,U4
CISO PACW 2,157 17,615
ctso PGE 15,394
crso PWRX 31,560 41,185
crso SRP 28,511 46,236
CISO TEPC 824 813
crso TIDC 5,648 6,896
tPco AVA 1 7 111 13,070
tPco BPAT 1,270 298
tPco NEVP 62,095 48,046
tPco NWMT 4U 871
tPco PACE 7,143 4,091
tPco PACW 31,503 25,610
tPco PSEI 0 0
PCO SCL 11,840 11,144
LADWP AZPS 10,982 1 7 035
LADWP BPAT 0
LADWP CISO 129,042
20,189
97,849
LADWP NEVP 26,589August
MPP/MA&F Copyright 2022 California ISO Page 13 of 37
WEIM BENEFITS REPORT THIRD CUARTER2OZI
LADIfVP PACE 17,333 19,364
NE\tr AZPS 12,237 16,914
NEVP ctso 1ff1,378 124,U3
NE\IP LAI}WP 29,339 33,205
AVAtIWMT 42,%7 45,970
IIW[,fl'rPco 11,670 11,n7
}SvMT PACW 1 0
PSEIt{vvMT 0 0
PACE AZPS 160,806 141,419
PACE LAENilP 142,727 139,%2
PACE tIWMT 26,951 29,329
SRPPACE 0 0
PACW AVA 4,U1 4,831
PACW CISO 16,379 42,807
August
MPP/MA&F Copyrlght 2022 Califorr$a lS0 Page 14of37
WEIM BENEFITS REPORT THIRD QT.IARTER2OZI
PACW T{WMT 0 0
PACW PSEI 25,966 24,939
PGE AVA 3 0
PGE crso 2A,42 17,8n
PGE PAG,V 27 37A 27,2M
PGE scL 1,559 1,386
PNM AZPS 37,U1 33,201
PNM TEPC 45,943 41,4#
PSEI BPAT 30,712 33,488
PSEI tIWMT 1 0
PSEI PGE 0 0
PSEI SCL 20,398 18,122
P\,Vru(BPAT 7,231 583
PWRX PSEI 19,494 19,059
Atlgrust
MPP/MA&F Copyrigttt 2022 Gllforida ISO PagB 15 of37
WEIM BENEFITS REPORT THIRT' QIJARTER2OZI
SCL BPAT at5 782
SCL PAGAI 809 998
SCL PSEI 4,629 6,210
SRP crso 71,182 57,&$0
PNMSRP 53 114
TEPC AZPS 87 0
TEPC LATM/P 0 0
PNMTEPC 4,U7 4,973
TIDC BANC 268 0
TPIA'R AVA 77 6
l.lwMTTPWR 0 0
TPVVR PSEI 4,755 5,025
AVA ctso 0 0
AVA tIWMT 2,030 1,354
Sqptamber
tvlPP/MA&F CopyrlSht 2022 Gllfornla ISO PeSe 16of37
WEIM BENEFITS REPORT THIRD OI'ARTER 202
AVA PGE 0 0
AVA SCL 16 0
crso 2U,2#177,N1AZPS
AZPS NEVP 2,241 4,389
AZPS PNM 9,952 7,659
18,700AZPSTEPC18,388
BANC crso 79911,7,632
BPAT AVA 4,455 2,3fr52
BPAT clso 12.375 21,2*5
BPAT LAT)WP 0 0
BPAT tIWMT 7,ilV 304
BPAT PGE 16,957 12,e1
BPAT Pt/vRx 4,143 81
BPAT TF{/I/R 10,946 13,156
Sepfember
MPP/MA&F Copyright 2022 Callfornia ISO Paee 17 of37
WEIM BENEFITS REPORT THIRD QUARTER 2022
ctso AZPS 11,956 16,177
ctso BANC 143,077 149,790
crso BPAT 5,351 10,692
crso LADWP 16,402 22,901
CISO NEVP 10,777 11,392
crso PACW 3,230 16,696
crso PGE 23,217 47,448
ctso ryvRx 229,900 249,969
crso SRP 47,912 56t1 89
crso TEPC 416 u4
crso TIDC 9,065 9,707
tPco AVA 31,064 26,177
rPco BPAT 1,290 221
rPco NEVP 70,187 52,886
IPCO NWMT 410 608
rPco PACE 3,251 818
tPco PACW 33,522 29,507
IPCO PSEI 0 0
PCO SCL 13,054 12,379
LADWP AZPS 3,177 3,905
LADWP BPAT 0 0
LADWP ctso 149,927
LADWP NEVP 5,265
24,443
7 1 84
LADWP PACE 27,507
LADWP i TEPC 0 0
NEVP AZPS 6,718 7,215
NEVP
NEVP
BPAT 0
305,456
0
228,955crso
September
September
122,421
MPP/MA&F Copyright 2022 California ISO Page 18 of 37
WEIM BENEFITS REPORT THIRD QUARTER2022
NEVP tPco 26,060 24,227
PACE 5 765t 6,771NEVP
NWMT BPAT 13,608 10,591
NWMT PACE 5,765 2,UO
l.lwMT PGE u 0
NWMT THA/R 0 0
PACE lPco 148,341 151,578
PACE NEVP 122,613 107,518
PACE PACW 82,690 96,101
PACE TEPC 49811,10,424
PACW BPAT 6,384 3,608
PACW lPCO 13,402 6,459
PACl,V PGE 84,U4 87,308
PACW SCL 1,922 1,812
September
MPP/MA&F Copyright 2022 California ISO Page 19 of 37
WEIM BENEFITS REPORT THIRD QUARTER 2022
PGE BPAT 37,426 42,258
'' 26,559 . .
PGE NWMT 64 0
PGE .PACW ,' Ig,s76 17,835
PGE PSEI 0 0
PGE scL 1,551
PGE TPWR 0 0
PNM AZPS 52,812 53,044
PNM SRP 15,002 11,113
PNM TEPC 38,111 36,732
PSEI AVA 0 0
PSEI BPAT 31,606 33,574
PSEI tPco 0 0
PSEI tMrMT 1
PSEI PACW 2 0
PSEI PGE 0 0
PSEI PWRX 17,690 18,331
PSEI SCL 10,638 8,578
PSEI TPWR 8,836 10,706
PlA'RX BPAT 4,025 0
PWRX crso 0 0
PWRX PSEI 7,260 7,661
SCL AVA 16 0
SCL BPAT 1,378 2,707
SCL tPco 3,048 2 t942
SCL PACW 584 673
SCL PGE 905 978
SCL PSEI 10,624 14,678September
MPP/MA&F Copyright 2022 California ISO Page 20 of 37
WEIM BENEFITS REPORT THIRD QUARTER2022
SRP AZPS 8,100 8,178
SRP PACE 0 0
SRP TEPC 29,538 36,782
TEPC crso 73,757 62,516
TEPC PACE 23 198
TEPC SRP 7,907 5,482
TIDC crso 14 726t 12,930
TPWR BPAT 7,326 7 937
TP\A'R PGE 0 0
TABLE 2: Energy transfers (MWh) in the FMM and RTD markets tor Q32022
MPP/MA&F Copyright 2022 California ISO Paae 21 ol 37
WEIM BENEFITS REPORT THIRD QUARTER2022
tU' 6a
E&!a
hhhrd.,
-oncdiradion
e biJircctionol
I Colilornio ISO I IADVVP
I focilicCorp I Publk Scrvftr Compony ol Ncrr ltlaxko
I iW E*rgy ! Tuilocl lrrigolion Dishia
I tir"* PuUic Seruico ! Mnh\rfrrrm Energy
I fo.rtond O"nc.ol Ebctic I Avislo
I Puger Somd Encrgy ! Tucrn ELchic Po.r.r !nry2o22)
I h{oho Po",., Cornpony ! Tocomo Powtr
! Pouex $ Bonncvillc Powcr Adminisholimlqby 2022)
I AmC ! El Poro Elochic lany 2023)
- S.oiLCityl.bht IWAPAD.sGdsouthw.il Wynnt
X soh Rivsr Proioct
a
?d'Bfnildllor
Ceodl, tilWl
Poth 24 lD t00
21 tatrow$35-90
Eldmdo 797
Porh 35 (rvarl to eos{580
PoA 35 lcorl lo ms{538
Gondcrfovonl t30
PACW b PGE 320
Poth66fl5ObEf/ 627
Poth 66 IFGE o,5Ol 296
?oth66 lr5o to PACWI 331
?oh66IPACWatfil t32
Poth l7 0.4001 2
PSE b PACW@
Polo \rrdc, N. Gilo 3,15.|
?ati78 IPACE a APSI 525
Poth78 &APSbPACEI 66O
Nolloio€ryrbl 522
M
,vt od 230 IAPS <-> rSO,| 236
,vLod 230 r,
lo
b
PACE b trcO 2,557
lrcO io PACE r,550
?.rvE b trco 262
lrco b l.IvE 390.178
Poworcx <-> PSE r50
Pomx<-> ISO r50
BANC <-> tSO 2,000.4,000
TrD b rso t,400
TID b B^NC 650
Poth 48 2,r00
SRP <-> IErc 9,988
sRP <-> Pt{r{400
slP <-> AzPs r 0,02 t
sRP <-> lso I /1,488
300
sRP <-> IDWP
Avisto <-> BPA
319
3,600
761
500
500
500
5m
Avislo <-> PACW
Avirlo <-> SCI
Avislo <-> TP
Avislo <-> PGE
GRAPH 2: Estimated maximum transfer capacity
I WHEEL.THROUGH TRANSFERS
As the footprint of the WEIM gro\t s, 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 import: summation of transfers above base transfers coming into the WEIM
BAA under analysis
MPP/MA&F Copyright 2022 California ISO Page 22 ol 37
WEIM BENEFITS REPORT THIRD QUARTER 2022
Total export: summation of all transfers above base transfers going out of the WEIM
BAA under analysis
Net import: 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 total
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 transfers 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
Consolidated lnitiatives stakeholder process, the ISO 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 wheel through. The net imports and exports estimated in this section
reflect the overall volume 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 corresponding calendar
quarter, as shown in Tables 3 through 6 and Graphs 3 through 6.
BAA Net Export Net lmport WheelThrough
AVA 43,479 156,138 29,698
AZPS 259,0L1, 266,659 457,402
BANC L8,674 525,589
BPAT L23,665 183,208 99,692
clso 9L5,264 1,081,334 683,L21
tPco 55,844 372,802 207,L77
LADWP 168,958 353,418 281,453
NEVP 451,4L6 794,276 3L7,674
94,44L 37,640 78,752
a
a
a
a
MPP/MA&F
NWMT
Copyright 2022 California ISO Page 23 of 37
WEIM BENEFITS REPORT T}flRD CI'ANTERanzl
PGE
PSEI
sct
PACE
TEPC
TPWR
L19,444
11,158 42,5n 28995
TABLE 3: Estlnabdwheel{hrough Uanrfiere ln GE 2llD
f
=E
pocul
2.500,000
2,(X)0,000
1,600,0(D
,000,000
800,000
0
I
".lopuo$d$..."df$*$$."&..d.&o$.e{S"dd<t'of,d"
rNetErport rNdlnport rll*rocl Thror4fi
-
GRA,PH 3: EstlmaH whceldrrough Oarrilbrc lr Gl AAI
MPP/MA&F CowrlSttt 2022 Callfon$a ISO P?['E24ol37
WEIM BENEFITS .REPORT T}IIRD OUARTER2O&I
AZFS
BPAT
IP.M
NEVP
PAEE
TEPC
TPWR
PGE
PSEI
seL
33,619
25,e25 38,VU
E,V52
320
2,ffi!14,L79 7,W6
TAELE 4r Esflnrabd wheel;rthrough halrsfutB ln .fuly &*l
ifPP/lrim&r @wrlgtrt 2O22 Califqr{a l5O P4e 25of 37
WEIM BENEFITS REPORT THIRD q'ARTER2O22
g
==oocTT
1,Un,(po
qD,000
800,m0
7m,000
8(X),(X)0
500,000
400,m0
3m.(m
zx),0m
100,000
0 I---ilt-
oo$uuso".$.f"-o-u**us$.pu.p*-&.$.e:S"c)".+qdreoofo$
rNatEPort lNd hrport rUtrclTtuougft
GRA,PH 4: Eetlmabd whcl{hrough frensfierc ln July 202i1
AZPS 83439 90,836 155,9)8
BPAT 30,932
tPco
NEVP 129,850
PACE 492,N9 4493 49;620
35,381 95,563 52$n
MPP/MA&F
PGE
Csmlght 2022 Gllfornia ISO Page 26 of37
WEIM BENEFITS REPORT THIRD GTJARIER2OZI
PSEI
scL
TEPC
TPWR 3,532 17,041 &587
TABIE 5: Estlmabd wheeldnoqgh tanrftrs ln Augutt 2lllZt
i
=E
CDoElu
000,u,0
5m,m0
300,000
200,m0
0 I t
rN6t Export rNet lnport lV\ft*lThroqgh
GRA,PH 5: Estmabdwheehthrough bansfieru ln Argust 2022
100,0m ----;tl
"$
g"6fo*O ..o -"H d*n$.S..d .& +* *&S udr .d *eo ootd$
-I*I
MPP/MA&F Copyrlght 2022 Cltlifon{a ISO P.ge 27 of3,
WEIM BENEFITS REPORT THIRD GUANTERzOZT
AZPS 1/[1,520
IPCO
iTEVP
PACE
PGE LOl,4t4 46,942
14,251
TEPC
TPWR 5,025 113s9 1X508
TA8LE 6: Ertfina$ wheeldrrcugh tandbm ln SeptmtbctfrZl
PSEI
llPP/It A&F Copyrlgtt 2022 Glifiorda ISO Pqg! 28 oftT
WEIM BENEFITS REPORT THIRD QUARTER2022
E3
=
CDoE
UJ
900,000
800,000
700,000
600,000
500,000
400,000
300,0@
200,000
100,000
0 llr rll ll!r lr II
S. d""S" 6.* "* .."1"* .nt."$ o"&o€$ o& c+$ .*:-S uo' uoo C ^st".S
r Net Export rNet lmport r\4heel Through
GRAPH 6: Estimated wheel-through transfers in September 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 reneurable curtailment volume in [\rtWh for
Q3 2022 was calculated to be 20,691 ttl|Wh (July) + 9,471 ttMh (August) + 12,396 ,*n
(SePtember) = 42,4681rryh 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 18,176 metric tons of COz for Q3 2022. Avoided renewable curtailments also may
have contributed to an increased volume of renewable credits that would otherwise have been
unavailable. This report does not quantifu the additional value in dollars associated with this
benefit. Total estimated reductions in the curtailment of renewable energy in the ISO footprint,
along with the associated reductions in COz, are shown in Table 7.
Year Quarter MWh
2 3,629 1,553
4 1 7 765 5217,
MPP/MA&F
2015
Copyright 2022 California ISO
Eq. Tons Coz
Page 29 of 37
WEIM BENEFITS REPORT THIRD QUARTER2022
2016
2017
2018
2019
2020
2021
2022
TABLE 7: Total reduction in curtailment of renewable energy and associated reductions in COz
158,806 67,969
23,390 10,011
67,055 28,700
18,060 7,730
129,128 55,267
23,425 10,026
132,937 56,897
35,254 15,089
147,514 63,136
39,956
109,059 46,677
38,044
118,352 50,655
781,1011,825,188
MPP/MA&F Copyright 2022 California ISO PaSe 30 of 37
WEIM BENEFITS REPORT THIRD QUARTER 2022
F LEXIBLE RAM PING PROCU REM ENT DIVERSITY SAVI NGS
I 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 individua! 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
AVA up 14 71
AZPS up 51 318
BANC up 4 147
BPAT up 102 460
c/so up 443 2,453
tPco up 76 216
LADWP up 65 456
NEVP up 72 370
NWMT up 17 128
PACE up 108 592
PACW up 50 189
PGE up 56 223
PNM up 35 200
PSE/up 42 199
PWRX up 48 235
SCt up 4 34
SRP up 42 262
TEPC up 52 132
TIDC up 2 15
TPWR up 3 17
ALL EIM up 558 2,624
AVA down 20 78
July
MPP/MA&F Copyright 2022 California ISO Page 31 of 37
WEIM BENEFITS REPORT THIRD q'ARTER2O22
July
Atgust
BANC dorn 2 1il
crso dorn 108 1,922
downLADVYP 59 289
NWMT dorn u 171
downPACW 59 208
PNM dorvn e7 182
Pttyru(dorn 67 28
SRP dorn 37 175
TIDC dorn 2 23
ALL EIiI dmn 370 1,852
An8 up 46 344
BPAT up 109 460
uptPco 60 216
NEVP up 63 423
PACE up 132 592
MPP/MAar Copyrleftt 2022 Glifomla ISO Page 32 of 37
WEIM BENEFITS REPORT THIRD QUARTER 2022
August
PGE up 60 223
up 40
PSE/up 28 161
PWRX up 61
scr up 4 41
SRP up 58 262
TEPC up 44 129
TIDC up 2 15
TPWR up 2 15
ALL WEIM up 636 2,713
AVA down 22 71
AZPS dorn 42 390
BANC down 2 154
BPAT dorn 127 401
c/so down 167 1,003
tPco down 40 214
LADWP down
down
72 289
NEVP 23 360
NWMT down 44 171
PACE down 164 652
PACW down 52 203
PGE down 39 257
PNM down 37 182
PSE/down 29 198
PWRX down
down
57 246
SCL 0 24
SRP down 34 169
TEPC down 40 110
TIDC
TPWR
down
down
2
3
26
19
ALL EIM down 1,569261
MPP/MA&F Copyright 2022 California ISO Page 33 of 37
WEIM BENEFITS REPORT THIRD QTJARTERzOZI
September AZPS up 54 315
BPAT up 82 481
tPco up 47 213
NEVP up a+410
PAEE up 108 651
PGE up 60 259
PSE'up 28 147
sct up 4 41
TEPC up u 221
TPWR,up 2 15
AVA dorn 18 113
BANC dqrn I 134
dorncrso 135 1,145
LADWP dorn 62 364
NWMT dourn 40 168
MPP/MI,&F Comlsht 2022 Callfqnla EO Pap !l4of 37
WEIM BENEFITS REPORT THIRD QUARTER 2022
PACW down 33 160
PGE doarn 18538
PNM down 38 229
PSE/down 26 213
PWRX down 57 307
scr dorn 262
SRP down 25 544
TEPC down 37 215
TIDC down 3 32
TPWR down 3 18
ALL WEIM down 226 1 645,
September
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.
July August September
Direction
Average MW saving
Sum of BAA requirements
Percentage savlngs
Table 9: Flexible ramping procurement diversity savings in Q3 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 t\lW multiplied by the flexible ramping
WEIM-wide marginal price. A positive flexible ramping surplus ttrlW is the capacity that a BAA
provided to help other BAAs, and a negative flexible ramping surplus ttlW 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.
Up Dorn Up Down Up Down
1,909 1,912 1,886 1,917 1,708 1,928
3,336 2,877 3,356 2,954 3,175 2,9U
57o/o 66%56%65o/o 54%66%
MPP/MA&F Copyright 2022 California ISO Page 35 of 37
WEIM BENEFITS REPORT THIRD QUARTER2022
I CONCLUSION
Using stateof-theart technology to find and deliver lor-cost energy to meet real-time demand,
the WEIM dernonstrates that utilities can realize financial and operational benefits through
increased coordination and optimization. In 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
renqnrable generation that otherwise would have been turned off. The quantified environmental
benefits ftom avoided curtailments of renerarable generation ftom 2015 to-date reached 781,101
metrictonsof COz, roughlytheequivalentof avoidingtheemissionsfiom 164,223 passenger
cars driven for one year.
MPP/MA&F Copyright 2022 California ISO Page 36 of 37
WEIM BENEFITS REPORT THIRD QUARTER 2022
APPENDIX 1: GLOSSARY OF ABBREVIATIONS
Abbreviation Descri
APS Arizona Public Service
AVA Avista Utilities
BAA Area
BANC
BPA
cts rso
EIM
FMM
GHG
tPco
LADWP
lvlwh
NVE
PAC
PACE
PACW
PGE
PSE
PWRX
RTD
SCL
SRP
TEP
TID
TPWR
WEIM
of Northern Califomia
Bonneville Power Adm inistration
California ISO
E lmbalance Market
Fifteen Minute Market
Greenhouse Gas
ldaho Porver
of Water and PowerLosD
East
West
Portland General Electric
Sound E
Powerex
RealTime D
Seattle
Salt River P
Tucson Electric Power
Turlock I District
Tacoma Power
Westem Energy lmbalance Market
I
NV
MPP/MA&F Copyright 2022 California ISO Page 37 of !7