20200903Quarterly Report.pdf

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An IoACORP Compeny
JULIA A. HILTON
Ileputy General Counsel
[e-mail]
VIA ELEGTRONIC MAIL
September 2,2020
Ms. Jan Noriyuki
Secretary
ldaho Public Utilities Commission
PO Box 83720
Boise, lD 83720-0074
Re:Case No. IPC-E-16-19
Defenal and Recovery of Costs Associated with Participation in Energy lmbalance
Market - california lndependent system operator C'cAlso') euarterly 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 Powe/' or'Company") hereby submits the quarterly CAISO Western EIM Benefits Report("Report") for the second quarter of 2020. The Report presents CAISO's quantification of benefits
associated with participation in the Western ElM. For the second quarter of 2020, CAISO
estimated Western EIM gross benefits of $6.08 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, eAISO'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 Regulatory Analyst Nicole
Blackwell at [phone] or nblackwel l@idahopower. com.
Sincerely,
)i-'ln t'f-=
Julia A. Hilton
JAH:slb
Enclosure
{
I
wililt F{i! i t",l[ li{ ,Y lMt{AtAl'.J(:f AAAI{Kt t
JTs i.crliii.,, r rro lIi )
July 29,2O20
The ISO is pleased to announce that as of July 3,2020 customers of entities
participating in the Westem Energy lmbalance Market (Westem EIM) have seen $1
billion in gross benefits since its start in 2014. This milestone wis achieved based on
the benefits quantified in the Q22020 EIM benefits report plus additlonal benefits
quantified in the first days of July.
When the Westem EIM began in November 2014,1 noted that "consumers across the
West win one today as the EIM is live, performing well and working to reduce costs to
@nsumers."
The Westem EIM has surpassed the participation and benefit savings expectations of
the origlnal studies. The access to a real-time market continues to provide value to
customers acrcss the West while preseMng participating entities'oontrolover
transmission and generation assets. lt is building on the ISO's highly successful market
platfonn and provides a low-cost, low-risk option with proven benefits.
The ISO looks fonrard to the continued success of the Western EIM and building upon
our strong relatlonship with all stakeholderc following thls significant milestone.
Sincerely
Sterre Berberich
President and CEO
www.westerneim.corr I CalifornialsO 250 Outcr.opping Way, Folsom, CA 95630 | S16.351.4400
@ Colifornio tSO
WESTERN EIM BENEFITS REPORT
Second Quarter 2020 , r r
Prepared by: Market Analysis and Forecasting
July 29, 2020
WESTERN EIM BENEFITS REPORT SECOND SUARTER 2O2O
CONTENTS
EXECUTIVE SUMMARY ..'.,... 3
4
4WESTERN EIM ECONOMIC BENEFITS IN Q2 2020........"
CUMULATIVE EIM BENEFITS SINCE INCEPTION ...., "
I NTER-REGIONAL TRANSFERS ...,....
..5
..5
12WHEEL THROUGH TRANSFERS
REDUCED RENEWABLE CURTAILMENT AND GHG REDUCTIONS...'17
FLEXIBLE RAMPING PROCUREMENT DIVERSIW SAVINGS............. ..............18
coNcLUS1ON................21
MPP/MA&F Copyright 2020 California ISO Page 2 of 21
WESTERN EIM BENEFITS REPORT SECOND QUARTER 2O2O
EXECUTIVE SUMMARY Povrerex
Morket Oporolor
Coli[ornio ISO
EIM entity
[''i A"tirn porticipont
! Plonmd EIM entry 2021
p' elonred EIM enrry 2022Gross benefits from EIM since November 2014
Seqflle
City Lishl
Iocomo
Pqwer
Portlond
Generol
Elthic
This report presents the benefits associated with
participation in the Western Energy lmbalance
Market (ElM).
The measured benefits of participation in the
Western EIM include cost savings, increased
integration of renewable energy, and improved
operational efficiencies including the reduction of the
need for real-time flexible reserves.
los Anqeles
Deptlol
Ariaxm?ublic f Public Service
Compony oINew Mexico
Power
, y ...,:.J
J.-,
,"nrt( i )t'
Prorsl I' Iucson
Eletric
Powsr
a
This analysis demonstrates the benefit of economic
dispatch in the real time market across a larger EIM footprint
with more diverse resources and geography.
Q2 BENEtrITS
Q22020 Gross Benefits by Participant
Arizona Public Service
BANC
California ISO
ldaho Power
NV Energy
PacifiCorp
Portland General Electric
Puget Sound Energy
Powerex
Seattle City Light
Salt River Project
Total
(miilions $)
$6.40
$9.1 7
$21.25
$6.08
$4.73
$8.46
$9.1 5
$2.84
$1.15
$1.63
$8.14
$79.00
ECONOMICAL
Gross benefits realized due to more
efficient inter-and intra-regional
dispatch in the Fifteen-Minute
Market (FMM) and Real-Time
Dispatch (RTD).
ENVIRONMENTAL
Metric tons of COz**avoided
curtailments
-ElM Quarterly Benefit Report Methodology,
https //www.caiso.com/Documenls/ElM BenefitMethodolooy.pdf OPERATIONAL
-'The GHG emission reduction reported is associated with the avoided curtailment
only. The current market process and counterfactual methodology cannot differentiate
the GHG emissions resulting from serving ISO load via the EIM versus dispalch lhat
would have occurred external to the ISO without the ElM. For more details, see
http.//wwv. caiso.com/DocumenlsicrceLhouseG_asEmrssionsTrackinoReoort-
flegue ntlyAs kedQuesliEtq QdI
Average reduction in flexibility
reserves across the footprint
i r, rr'
MPP/MA&F Copyright 2020 California ISO Page 3 of 21
WESTERN EIM BENEFITS REPORT SECOND QUARTER 2O2O
ffi BACKGROUND
The Western EIM began financially binding operation on November 1,2014 by optimizing
resouroes across the ISO and PacifiCorp Balancing Authori$ 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 Oc-tober
2017. ldaho Power and Powerex began participating in April2018. The Balancing Authori$ of
Northern California (BANC)1 began participating in April2019. Most recently, Seattle City Light
(SCL) and Salt River Project (SRP) began participating in April2020. The EIM footprint now
includes portions of Arizona, California, ldaho, Nevada, Oregon, Utah, Washington, Wyoming,
and extends to the border with Canada.
The ISO began publishing quarterly EIM benefit reports in April 20152.
I WESTERN EIM ECONOMIC BENEFITS IN Q2 2O2O
Table 1 shows the estimated EIM gross benefits by each region per months. The monthly
savings presented show $23.54 million for April, $28.14 million for May, and$27.32 million for
June with a total estimated benefit of $79.00 million for the quarter.
Region April May June Total
APS
BANC
c,so
lPco
NVE
PAC
PGE
PSE
PWRX
scr
SRP
$1.83 $2.24 $6.40
$9.17$3.90 $2.36 $2.91
$6.01
$1.63
$7.82
$2.34
$7.42
$2.11
$0.88
$6.08
$2.34 $1,51 $4.73
$1.62 $3.55 $3.29 $8.46
$2.10
$0.95
$0.39
$0.48
$3.45
$1.17
$3.60
$0.72
$0.37
$0.69
$3.00 $E.14
$79.00$27.32
$2.33
$21.25
$9.15
$2.84
$0.39 $1.15
$0.46 $1.63
$2.29 $2.85
Total $23.54 $28.14
TABLE 1: Second Quarter 2020 beneflts in milllons USD
' The benefits reflect the Sacramento Municipal Utility District as the participating resource within BANC.
2 Prior reports are available at https://www.westerneim.com/Paqes/AbouUQuarterlvBenefits.aspx
3 The EIM 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 of the total intervals.
MPP/MA&F Copyright 2020 California ISO Page 4 of 21
WESTERN EIM BENEFITS REPORT SECOND QUARTER 2O2O
I CUMULATIVE EIM BENEFITS SINCE INCEPTION
Since the start of the EIM in November 2014, the cumulative economic benefits have totaled
$998.69 million. The quarterly benefits have grown over time as a result of the participation of
new BAAs in the market, which results in additional benefits for both the individual BAA but also
compounds the benefits to adjacent BAAs by enabling further transfers. Graph 1 illustrates the
gross economic benefits of the EIM by quarter for each participating BAA.
$120
$100
ECISO iPAC ONEVP EIPSEI @AZPS EPGE 'IPCO IPWRX 'BANC SCL
NN
r SRP
GRAPH 1: Cumulatlve gross benefits slnce the lnception of the EIM
I INTER.REGIONAL TRANSFERS
A significant contributor to EIM benefits is transfers across BAAs, 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 ElM. Transfers can take place in both the
15-Minute Market and Real-Time Dispatch (RTD).
Generally, transfer limits are based on transmission and interchange rights that participating
BAAs make available to the ElM, 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 quantify
a BAA's opportunity cost that the utility considered when using its transfer rights for the ElM.
Table 2 provides the 15-minute and S-minute EIM transfer volumes with base schedule
transfers excluded. The EIM 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
MPP/MA&F Copyright 2020 California ISO Page 5 of 21
B*oE=" t# $40
gE',.msEffimHHEnfrEffiBHI
Q4 Ql 02 03 04 01 02 Q3 Q4 01 02 Q3 04 Q1 02
2014 2015 2016 2017 n
01 a2
MU
EH
01 Q2o4
20 19
o3
18
WESTERN EIM BENEFITS REPORT SECOND QUARTER 2O2O
ElM. 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 transfer from BAA_x to BAA_y and the transfer from BAA3 to BAA_x are separately
reported. For example, if there is a 100 Megawatt-Hour (MWh) transfer during a $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
direction. The 1S-minute transfer volume is the result of optimization in the 1S-minute market
using all bids and base schedules submifted into the ElM. The S-minute transfer volume is the
result of optimization using all bids and base schedules submitted into ElM, based on unit
commitments determined in the 1S-minute market optimization. The maximum transfer
capacities between EIM entities are shown in Graph 2 below.
Month From BAA TO BAA
lSmln EIM
transfer
(15m - base)
Smin EIM
transfer
(5m - base)
April AZPS CISO 72,483 52,848
AZPS NEVP 3,558 5,406
AZPS
AZPS
PACE
SRP
114,949
s5,591
'140,215
50,295
BANC ctso 2,677 1,799
crso AZPS 143,796 172,210
ctso BANC 107,842 113,520
oso
clso
NEVP
PACW
260,691
21,564
38,982
252,850
41,158
ctso PGE M,748
clso PWRX 57,402 71 557
CISO SRP 99,096 97,471
tPco NEVP 29,644 18,209
tPco
rPco
rPco
PACE 64,934
50,898
5,859
57,266
PACW
PSEI
01,499
7,575
tPco
NEVP
SCL
AZPS
4,817
25,661
6,123
14,905
NEVP CISO
tPco
PACE
99,893
70,765
166,394
59,691
70,376
182,U4
NEVP
NEVP
MPP/MA&F Copyright 2020 California ISO Page 5 of 21
WESTERN EIM BENEFITS REPORT SEGOND QUARTER 2O2O
Month From BAA To BAA
{Smin EIM
transfer
(15m - base)
Smin EIM
transfer
(5m - base)
April PACE AZPS 25,967
PACE IPCO 4,576
PACE NEVP 21,797
PACE PACW 27,960
PACE SRP 0
PACW ctso 44,562
PACW tPco 37,43
PACW PGE 9,605
PACW PSEI 7,809
PACW SCL 188
PGE crso 8,298
PGE PACW 98,689
PGE PSEl 2,311
PGE SCL 3,611
PSEI rPco 0
PSEI PACW 73,082
PSEl PGE 932
PSEI PWRX 16,1 15
PSEI SCL 3,753
PWRX ctso 0
PWRX PSEI 21,165
SCL tPco 7,217
SCL
SCL
PACW
PGE
7,770
4,817
SCL PSEI 19,110
SRP AZPS 23,600
SRP crso 65,182
SRP PACE 0
15,724
6,218
5,M6
38,411
0
49,485
23,872
7,513
10,473
423
7,507
105,787
2,524
4,123
0
71,234
1,014
20,345
4,456
0
19,865
6,1 08
8,349
5,026
19,269
28 032
67,M4
0
May AZPS crso 41,930
4,070
24,544
6,072AZPSNEVP
MPP/MA&F Copyright 2020 California ISO Page 7 of 21
WESTERN EIM BENEFITS REPORT SECONO OUARTER 2O2O
Month From BAA To BAA
lSmln EIM
transfer
(15m - base)
Smin EIM
transfer
(5m - base)
May AZPS
AZPS
BANC
crso
crso
ctso
crso
crso
crso
crso
tPco
rPco
tPco
tPco
tPco
NEVP
NEVP
NEVP
NEVP
PACE
PACE
PACE
PACE
PACE
PACW
PACW
PACW
PACW
PACW
PGE
PACE 150,220 161,038
SRP
crso
109,066 108,844
8,673 6,146
AZPS 256,917 268,7ffi
BANC 107,338 1 15,550
NEVP 345,660 359,883
PACW 27,795 45,548
PGE
PWRX
26,418
26,313
50,229
36,553
SRP 138,772 135,264
NEVP
PACE
PACW
10,047 5,459
79,540
64,778
87,145
53,291
PSEI 3,092 2,830
SCL 2,331 2,139
AZPS 18,571 16,691
ctso 39,603
83,362
224,444
19,362
tPco 75,839
PACE 230,665
AZPS 26,685
11,926
17,315
tPco 9,738
NEVP 15,030 6,998
PACW
SRP
19,301 20,934
0 0
ctso 63,533 70,808
tPco
PGE
29,908
8,307
26,891
8,612
PSEI
SCL
crso
3,109
189
882
5,143
325
838
MPP/MA&F Copyright 2020 California ISO Page I of 21
WESTERN EIM BENEFITS REPORT SECOND QUARTER 2O2O
Month From BAA To BAA
l5min EIM
transfer
(l5m - base)
Smin EIM
transfer
(5m - base)
May PGE PACW 102,552 110,046
PGE PSEl 1,763 2,139
PGE SCL 3,134 3,332
PSEI tPco 0 0
PSEI PACW 92,987 100,189
1,939PSEIPGE2,024
PSEI PlA'RX 10,995 12,838
PSEI SCL 5,1 95 6,219
PVVRX ctso 0 0
PVVRX PSEI 28,934 29,781
scL tPco
PACW
PGE
PSEI
10,817 10,209
scL
scL
6,899 7,968
4,U8 4,780
SCL 8,109 9,329
SRP AZPS 32,159 42,233
SRP crso 49,921 43,272
SRP PACE 0 0
AZPS crso 81,299 59,776
AZPS NEVP
PACE
SRP
5,501
129,536
87,648
16,091
6,152
138,818AZPS
AZPS 97,546
BANC CISO 13,897
clso
crso
AZPS 131,269 163,389
BANC 119,050 130,846
CISO i NEVP 20a,517 213,329
ctso
crso
PACW
PGE
'109 10,040
15,'t433,076
crso PWRX 14,707 24,811
SRP 172,246
8,125
166,915
7,296NEVP
MPP/MA&F Copyright 2020 California ISO Page 9 of 21
WESTERN EIM BENEFITS REPORT SECOND QUARTER 2O2O
Month From BAA To BAA
16min EIM
transfer
(15m - base)
Smln EIM
transfer
(5m - base)
June rPco PACE 86,625 91,534
tPco PACW 31,093 22,182
IPCO PSEI 2,868 2,475
tPco SCL 1,350 1,356
NEVP AZPS 9,669 9,175
NEVP ctso 59,802 44,789
NEVP tPco 54,540 42,488
NEVP PACE 177,282 181,080
PACE AZPS 42,370 36,569
PACE tPco 3,604 2,514
PACE NEVP 20,528 17,037
PACE
PACE
PACW
SRP
10,986
0
6,119
0
PACW crso 21,950 58,136
14,755PACWlPco14,833
PACW PGE '12,363 9,301
PACW PSEI 9,474 8,436
PACW SCL 1,026 909
PGE crso 19,811 19,189
PGE PACW 85,380
1,474
91,870
1,44',1PGEPSEI
PGE SCL 4,244 3,898
PSEI rPco 0 0
82,797PSEIPACW72,976
PSEI PGE 851 839
PSEI PWRX 20,406
7,252
0
20,724
PSEI SCL 7,010
PWRX ctso 0
23,011PWRXPSEI20,055
16,295SCLrPco 15,993
MPP/MA&F Copyright 2020 California ISO Page 10 of 21
WESTERN EIM BENEFITS REPORT SECOND QUARTER 2O2O
TABLE 2: Energy transferc (MWh) ln the FMM and RTD markets for Q2 2020
Cfirrfrd lrcCqr.tylml
Fotr 24 itraatbaosil 100
Fofi 2a lhost t lrorf, 3540EHorodo 797ffiffiC'ondm.no,s* l3O
Rtcwb f$f 320ffi
Folft 66 0G[ tul$t? 206
Pil'i
Folfi 66 NObB4Cttul 331
lot'SPrcli/ir$C, 432
Fdt 17 g4ggt rffi@
Fdotttnd., t{. Gilo 3.151BairTSFrGoapS azs
Fdl78 lAPsrrfl^Ctl 660NorioC'.rltol 522
irnod 500 3{0
l&ftrt,)t''b FCO
.*qildire!. <+bidi.Efiorcl
Sii (dil*ni: lI(] ! HOWP iutr rOetl
I fo.fiX-"7 ! fuHic Stnke Compony od Ne Mar;o
!.Hyilr* r*,- r$i'rffijl.r"* y tnrr rnt)
! *nono o,a thdic I L'loct lrE'non Dirhrcl lorq'ot I !
I no* so.n+ t*v I,r"i*" lcfrf ,'dnl
! gr-|no 2o* 1--ftv I lwsn ttdnc Po*o lst)' zi??'l
I fo* ! bcono Pwa l*'iY'rlnl
! lAr.rc 1,,r* r.,ryzu:4 ESlf4PnoAd'i'i*"ri"'S.dil. (rI lEk ! Xrcl trcrgy Colwdo t*ry ?o?i15oi Xiw Fr{m
ffi
|FLOlo l{Yt 3Vg4/U
lbterex <-> ?5[ l5Offi
r a *sd ue+ adLl{. L' glElrriw fr4 i'.L- aJ *.si s . .&{ J rralrE(t,lEcrrrEr -J rJ E +t: $4r h il A. MLIL ro n r*:r$OrladrriCl ..J!,1' il +.1L dry+,rltEl h *. rJGwe tkl t.r,rJaJ.tLmrL
c.dr.rl4 ilrD
GRAPH 2: Estimated maximum transfer capacity (ElM entities operating in Q2 2020)
Month From BAA To BAA
lSmin EIM
transfer
(15m - base)
Smln EIM
transfer
(5m - base)
SCL PACW 7,161
4,928
8,678
SCL PGE 5,378
22,',|59SCLPSEI17,602
SRP AZPS 50,365 48,843
52,980
0
ctso 59,886
0SRPPACE
MPP/MA&F Copyright 2020 California ISO PaSe 11 of 21
WESTERN EIM BENEFITS REPORT SECOND QUARTER 2O2O
r WHEEL THROUGH TRANSFERS
As the footprint of the Western EIM grows and continues to change, wheel-through transfers
may become more common. Currently, an EIM entity facilitating a wheelthrough receives no
direct financial benefit for facilitating the wheel; only the sink and source directly benefit. As part
of the Western EIM Consolidated lnitiatives stakeholder process, the ISO committed to
monitoring the wheel through volumes to assess whether, after the addition of new EIM entities,
there is a potential future need to pursue a market solution to address the equitable sharing of
wheeling benefits.
The lSO will continue to track the volume of wheel-through transfers in the EIM market in the
quarterly reports. ln order to derive the wheel-through transfers for each EIM BAA, the ISO uses
the following calculation for every real-time interval dispatch:
. Total import. summation of transfers above base transfers coming into the EIM BAA
under analysis. Total export: summation of all transfers above base transfers going out of the EIM
BAA under analysiso Nef impot the maximum of zero or the difference between total imports and total
exports. Nef expott: the maximum of zero or the difference between total exports and total
importso Wheel through: the minimum of the EIM transfers into (total import) or EIM transfer
out (total export) of a BAA for a given interval
Allwheel-through transfers are summed over both the month and the quarter. This volume
reflects the totalwheel-through transfers for each EIM BAA, regardless of the potentialpaths
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 EIM 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.
MPP/MA&F Copyright 2020 California ISO Page tZ of 27
WESTERN EIM BENEFITS REPORT SECOND QUARTER 2O2O
BAA Net Export Net lmport Wheel Through
AZPS
BANC
c,so
tPco
NEVP
PACE
PACW
PGE
PSE/
PWRX
sct
SRP
TABLE 3: Ertlmated wheel.through transferc ln Q2 2020
3.000,000
2,500,000
=E
o
0)
UJ
2,000,000
1,500,000
,000,000
500,000
ffi ffi
ffi
ffi
SRP
0 ffi ffi
AZPS BANC CISO IPCO NEVP PACE PACW PGE PSEI PII,IIX SCL
rNet Export @Net lmport Evvheel Through
GRAPH 3: Estlmated wheel-through transfers ln Q2 2020
255,206 237,A92 597,722
21,847 360,376
2,299,397 401,569
203,687 82,387
251,350
223,218
217,227 174,093 731,599
84,619 1,172,909 98,853
32,695 624,505
261,656 83,525
262,U5
91,351
212,424 49,272 117,363
49,U5 159,683 23,397
99,139 16,125 24,221
281,171 656,289 1,760
MPP/MA&F Copyright 2020 California ISO Page 13 of 21
WESTERN EIM BENEFITS REPORT SECOND QUARTER 2O2O
BAA Net Export Net lmport Whee!-Through
AZPS
BANC
crso
tPco
NEVP
PACE
PACW
PGE
PSE/
PWRX
scr
SRP
83,596 65,732
1,799
722,429
64,639 86,336
86,773 41,601 240,921
29,647 343,727 36,513
8,275 243,243
32,446
83,680
74,107 46,0'15
63,577 26,263 33,529
10,485 82,602 9,406
29,791 6,100 9,033
95,319 147,870 284
TABLE 4: Estlmated wheel-through transfers ln Aprll 2020
c
3
o
IIJ
1,200,000
1,000,000
800,000
600,000
400,000
200,000
0 rill IIIt llll
litllrl
tlf] tl Lni
t-Jtnl LJlni rl
SCL
li
SRPAZPS BANC CISO IPCO NEVP PACE PACW PGE PSEI P\ /RX
ElNet Export t-lNet lmport [:l\nheel Through
GRAPH 4: Estimated wheel-through transfers in April2020
165,511
113,707
92,414146,736
20,412
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WESTERN EIM BENEFITS REPORT SECOND QUARTER2O2O
BAA Net Export Net lmport Wheel- Through
AZPS
BANC
c,so
tPco
NEVP
PACE
PACW
PGE
PSE'
PWPX
scr
SRP 244,017 899
TABLE 5: Estlmated wheel-through transferc ln May 2020
1,200,000
1,000,000
800.000
.c
B
=
rt)ocUJ
600,000
400,000
200.000
&&ffi @ffiffi
SCL SRP
ffi ffi ffi ffi ffi{
AZPS BANC CISO IPCO NEVP PACE PACW PGE PSEI P\ATIX
tsNet Export sNet lmport s4l^/heel Through
GRAPH 5: Estlmated wheel-through transfers ln May 2020
64,425 109,(N2 236,758
6,150 5,69811
944,955 95,613 69,358
70,463 42,336 80,547
54,775 90,764 288,375
20,980
23,583
15,308
83,732
81,645
241,995
32,994
9,678
40,672
448,096
8,839
96,491
32,752
39,620
31,491
24,483 4,199 7,933
84,606
MPP/MA&F
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Copyright 2020 California ISO PaSe 15 of 21
WESTERN EIM BENEFITS REPORT SECOND QUARTER 2O2O
BAA Net Export Net lmport WheelThrough
AZPS
BANC
c,so
tPco
NEVP
PACE
PACW
PGE
PSE'
PWRX
scL
SRP
TABLE 6: Estlmated wheel-through transferc ln June 2020
1,200,000
1,000,000
800.000
a
ts
=o
oc]U
600,000
400,000 l, ,,i
tittl;,.'lllII
ft.ri
200,000
ffi dh
t;i ,lllIIil
SRP
0
t-t
tilL-i ffil H t:l Htnl L:l
AZPS BANC CISO IPCO
n Net Export
NEVP PACE PACW
uNet lmporl
PGE PSEI PVI/RX SCL
rt\Mreel Through
GRAPH 6: Estimated wheel-through transfers in June 2020
107,185
13,897
62,918
130,970
195,454
89,578
56,336
202,302
30,849
82,474
12,584
44,215
5,153
7,355
577
632,O12 159,224
68,585
75,679
31,390
9,111
103,817
67,202
17,881
44,865
101,245
19,639
41,719
381,086
139,267
18,084
'13,330
36,409
5,825
264,401
MPP/MA&F Copyright 2020 California ISO Page 16 of 21
WESTERN ElM BENEFITS REPORT SECOND QUARTER 2O2O
I REDUCED RENEWABLE CURTAILMENT AND GHG REDUCTIONS
The Western EIM benefil 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 ElM, 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 Q22020 was calculated to be 51,654 MWh (April) + 60,398 MWh (May) + 35,462
MWh (June) = 147,514 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 COzlMWh, avoided curtailments displaced an
estimated 63,1 36 metric tons of COz for Q2 2A20. Avoided renewable curtailments also may
have contributed to an increased volume of renewable credits that would otherwise have been
unavailable. This report does not quantiff the additional value in dollars associated with this
benefit. Total estimated reductions in the curtailment of renewable energy along with the
associated reductions in COz are shown in Table 7.
Year Quarter MWh Eq. Tons CO2
2015 1
2
3
4
8,860
3,629
828
17,765
3,792
1,553
354
7,521
2016 1
2
3
4
112,948
158,806
33,094
23,390
48,U2
67,969
14,1d4
10,011
2017 1
2
3
4
52,651
67,055
23,331
18,060
22,535
28,700
9,986
7,730
2018 1
2
3
4
2019 1
2
65,860
129,128
19,032
23,425
52,254
132,937
28,188
55,267
8,146
10,026
22,365
56,897
MPP/MA&F CopyrlSht 2020 California ISO Page 17 of 21
WESTERN EIM BENEFITS REPORT SECOND QUARTER 2O2O
Year Quarter MWh Eq. Tons CO2
2019 3
4
33,843
35,254
14,485
15,089
37,125
63,1 36
2020 1
2
86,740
147,514
Total 1,246,404 533,381
TABLE 7: Total reduction in curtailment of renewable energy and associated reductions in COe
I FLEXIBLE RAMPING PROCUREMENT DIVERSITY SAVINGS
The Western EIM 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 EIM 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.
DirectlonMonth
April
BAA
AZPS up
BANC up
c,so up
tPco up
Mlnlmum
requlrement
25
Maximum
requlrement
235
53
1652
152
271
291
197
206
157
3
201
19
NEVP up
PACE up
PACW up
PGE up
PSEI up
23
86
53
49
20
56 228PWRX
scL up 3 46
SRP up 33 198
ALL EIi'I
down
down 7
3r
31
i
-1
II
i
{,935
AZPS
MPP/MA&F
BANC
Copyright 2020 California ISO
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Page 18 of 21
Month Maximum
requirement
April
c,so
IPCO
down
down
101
81
1,616
210
NEVP down 22 284
PACE down 105 320
PACW down 37 140
238PGE
PSE/
down
down
63
30 178
PWRX down 79 286
sct down 6 54
SRP down 34 156
ALL EIM down 293 1,816
AZPS up 3 308
BANC
c/so
tPco
up
up
up
2
319
14
78
1,695
216
NEVP up 18 29s
PACE up 05 315
197PACWup37
up
up
37
5
215
157
up 73 228
scL up 3 46
SRP up 19
353
39
4
188
ALL ElM
AZPS down
EANC down
1,936
207
75
c,so down
tPco down
142 1,641
27875
down
down
down
WESTERN EIM BENEFITS REPORT SECOND QUARTER 2O2O
BAA Dlrcction Minimum
requirement
PGE
PSE'
PWRX
May
NEVP 27 314
PACE 77 345
32
MPP/MA&F
PACW
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Month BAA Direction Minimum
requirement
Maximum
requlrement
May
PGE down 47 277
PSE'dowtt 30 244
PWRX down 58 297
scr down 3 63
SRP down 38
194
146
ALL EIM down 1,772
AZPS up 14 308
78
1,772
BANC
c/so
up 3
up 438
tPco up 33 217
NEVP
PACE
up
up
20
74
295
3'18
PACW
PGE
up
up
60
57
171
215
PSE/
PWRX
up
up
up
up
18
41
157
212
scr 3 31
SRP 25 151
ALL EIM up 465 1,940
AZPS down
down
down
26
1
272
67BANC
c/so 261 1,299
tPco down,
down
75
19
278
306NEVP
down
down
107 u5
148
277
244
PACW 42
PGE
PSE/
down
down
48
30
down
down
4S 297
633
down
down
29 132
306 1,453
WESTERN EIM BENEFITS REPORT SECOND QUARTER 2O2O
Table 8: Flexible ramping requirements
MPP/MA&F Copyright 2020 California ISO Page 20 of 21
WESTERN EIM BENEFITS REPORT SECOND QUARTER 2O2O
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 four individual BAA requirements.
April May June
Direction
Average MW saving
Sum of BAA requirements
Percentage savrngs
Down Up
999 9s3
1,983 1,998 1,957 1,990 2,050
48o/o 47o/o 49o/o 50o/o 47o/o
Table 9: Flexible ramplng procurement diversity savlngs in Q2 2020
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
EIM-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 EIM 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{he-art technology to find and deliver low-cost energy to meet real-time demand
across eight western states and extending to the border with Canada, the Western EIM has
proven extensive financial and operational benefits for participants. Since its inception in
November 2014, the cumulative gross economic benefits have reached $998.69 million.
The Western EIM 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 533,381 metric tons of CO2,
roughly the equivalent of avoiding the emissions from 112,141 passenger cars driven for one
year.
The Western EIM demonstrates that utilities can realize cost benefits and reduce carbon
emissions through increased coordination and optimization in the West.
Up Down Down
961 945
Up
966
1,840
988
54o/o
MPP/MA&F Copyright 2020 California ISO Page 21 of 21