20201119Quarterly Report.pdf

flmr.
JULIA A. HILTON
Deputy General Gounsel
ihiltor0idehooowor.com
VIA ELECTRONIC TIAIL
November 19,2020
Ms. Jan Noriyuki, Secretary
ldaho Public utilities Commission
PO Box A3720
Boise, lD 83720-0074
Re:
;Iifr=5i\Jfini --;t'- t. i- i '{ i- U
:ii:i ft*Y I I PH l; l+9
'' ,: ':'l i5. :.'. 1, . -joi*l+;-' :',. -i;, i.,i'{is$l0i'j
Sincerely
*y u-
AnID CoRPcomDanv
Case No. IPC-E-1S19
Deferraland Recovery of Costs Associated with Participation in Energy lmbalance
Market - california lndependent system operator ('CAlso') ouartlrty Energy
lmbalance Market fElM) 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') herebysubmits the quarterly CAISO Western EIM Benefits n6port('Report") for the third quarter of 2020. The Report presints CAISO's quantification of benefitsassociated wilh participation in the Western ElM. For the third quarte r of 2O20, CAISO estimatedWestem EIM gross benefits of $8.51 miltion for tdaho porver.
The EIM has provided financial benefits to the Company, and ultimately its customers.Houvever, as discrrssed in ldaho Porer's prior quarterty iomptiance filings, as well as the
C_ompany's May 24,2019, Report of EIM Benefits ano Cosis of Pdrticipation, 6AlSO,s calculationof benellts for ldaho Power is overstated due to several of the modeling assumptions used in itsbenefit calculation. The Company developed a more precise metholobgy, inat uses inputsspecilic to ldaho Power, for determining actual EIM benefits, the details otwnitn are discussed inthe Company's May 24,2019, Report of EIM Beneftts and Costs of Participation.
lf you have any 9!-estions regarding_ this report, please contact Regulatory Analyst NicoleBlackwell at (208) 38&5764 or [e-mail].
I
L:
Julia A. Hilton
JAH:slb
Enclosure
S Colifornio ISO
WESTERN EIM BENEFITS REPORT
Third Quarter 2020 m r r
Prepared by: Market Analysis and Forecasting
October 29,2020
WESTERN EIM BENEFITS REPORT THIRD QUARTER 2O2O
CONTENTS
EXECUTTVE SUMIiARY .............3
BACKGROUT{D........... ................ 4
WESTERN EtM ECONOMTC BEilEFtTS !N Q3 2020..... ......................4
CUMU1ATIVE EIM BENEFITS SINCE INCEPTION. .............,...5TNTER-REG!ONALTRANSFERS......... ................5WHEELTHROUGHTRANSFERS......... ,.....,...,..11
REDUCED RENEWABLE CURTATLMENT AND GHG REDUCT|ONS....................................17
FLEXTBLE RAMptNc PROCUREmENT DttERSIW SAV|NGS............. ..............1E
MPP/MA&F Copyright 2020 Callfornla tSO Pege 2 of 21
EXECUTIVE SUMMARY
This report presenb the benefits associated with
participation in the Westem Energy lmbalance
Maket (ElM).
The measured benefits of participation in the
Westem EIM indude ost savlngs, lncreased
integration of renewable energy, and improved
operationaleffciencies including the reduction of the
need for reaLthe ffexible reserves.
This analysis demonstrates the benefit of economic dispatch in
the real time market across a larger EtM footprint with more
diverse rasoutces and geograPhy.
03 2020 Gross Benefits by Particlpant
Sodb
Crry tl6hl
IoenoPdil
lrtarlet Oprotor
lil cdifomto so
EIM anlily
I AcFv. pdlicipdt
! Plonncd EIM aary 202 I
I rtonnca EL\l ontry 2022
r,,i t'l:;1',t
Q3 BENEFITS
Arizona Public Service
BANC
Califomia ISO
ldaho Porer
NV Enegy
Paclficorp
Portland General Eledric
Puget Sound Eneqy
Powerex
Seattle City Light
Salt River Projec't
Total
(nlilbnsS)
$22.60
$8.70
$23.68
$8.s1
$8.81
$13.47
$8.95
$3.44
$0.88
$2.s2
$17.41
$119.32
'ElM Quariedy Beneff Repott ltbthodology,
hlb./rwwu.6abo.offit p@u4gl* ElU B.nGfttlisfiodobor.odt
'"The GHG emiasion ledrctoil Eported ls assochbd wlth the avolded qrrhllrnent
mly. The flrrcnt mar&et plmoss and counterfaotJal me0roddogy cannot ditbrsntiate
tre GHG cmlaaionc rsaultrlg fionr seruhg ISO bad vla the EIM versus dbpabh that
rrould hane occuned eldemd to the ISO without the ElM. For morc dotaib. see
filpr1*st.cClo.oomrDogfitor&8 6€rfEUtcGeBErr{sSniTra#rBM-
Frsn €rdlYA.lcdGtueidms,odl
MPP/MA&F Copyright 2020 caltfornia lS0 Paee 3 of 21
WESTERN EIM BENEFITS REPORT THIRD QUARTER 2O2O
WESTERN EIM BENEFITS REPORT THIRD QUARTER 2O2O
I BACKGROUND
The Western EIM began financially binding operation on November 1,2014 by optimizing
resources across the lSO and PacifiCorp Balancing Authority Areas (BAAs). NV Energy beganparticipating in December 2015, Arizona Public Service and Puget Sound Energy beganparticipating in October 2016, and Portland General Electric began participating in O&ober
2017. ldaho Pourcr and Pouerex began participating in April2018, and the Balancing Authodty
of Northern Califomia (BANC)i began participating in Aprit2019. Most recenfly, Seattte City
Light (SCL) and Salt River Project (SRP) began participating in Aprit 2020.TheEtM fooerint
now includes portions of Arizona, California, ldaho, Nevada, oregon, lJtah, washington,
Wyoming, and extends to the border with Canada.
The lso began publishing quarterly EtM benefit reports in April 201s2.
I WESTERN EIM ECONOMIC BENEFITS IN Q3 2O2O
Table 1 shouts the estimated EIM gross benelits by each region per month3. The monthty
savings presented show $25.00 million for July, $66.09 million for August, and g29.23 million for
September with a total estimated benefit of $1 19.32 million for the quarter. This quarter
observed high load conditions rdrich drove tighter supply conditions and high prices. This was
mainly obserued in August due to the extreme heatwave that impac.ted the west.
Region Juty August September Total
APS
BANC
c,so
tPco
NVE
PAC
PGE
PSE
PWRX
scr
SRP
Totel
$4.30 $12.85 $5.45 $22.60
$1.75 $4.92 $2.03 $8.70
$3.77 $17.88 $2.03 $23.68
$2.05 $4.13 $2.33 $8.51
$1.89 $4.18 s2.74 $8.81
$6.65 $4.3s $13.47
$2.64
$0.9e
$4.00 $2.31 $8.95
$1.28 $1.17 $.n+
$0.39 $0.29 $0.20 $0.88
$1.10
ss.oe
$1.13 $0.64
$4.94
$28.23
$2.87
$17.41
Sr rs.iz$25.00
$8.78
$66.09
TABLE 1: Third Quarter 2020 benefits in mifiions USD
I The beneflts reflect the-sacramento Municipal Utilig District as the participating resource within BANC.2 Prior reports are available.at httos/v*yw.pirstemeih.comlpaoeyA6;wciuardrp8enefiti.aioxI The ElM.benefits reported here are te dataare excluded in the calculatlon. The intervals exduded due to unavailable data are normally Uinin a tewpercent of the total intervals.
MPP/MA&F Copyright2020California tSO pate4of 21
$2.43
WESTERN EIM BENEFITS REPORT THTRD QUARTER 2O2O
I CUTf,ULATIVE EIM BENEFITS SINCE INCEPTIOI{
Since the start of the EIM in November 2014, the cumulative economic benefits have totaled
$1.11 billon. The quarterly benefib have grorn over time as a result of the participation of neur
Batancing Aufrrority Areas in the market, wttich results in additional benefib for both the
indMdual BAAs but also compounds the benefib to adjacent BAAs by enabling further
tansfere. Graph 1 illustrates the gross economio benefits of the EIM by quarterfor eadt
participating BAA.
rCISO INEVP IAZPS TPGE rPWFJ(rSRP
GRAPH 1: Gtoss economlc benefits for each quarter by BAA
I INTER.REGIONAL TRANSFERS
A signiffcant contributor to EIM benefits is transfers across balancing aneas, poviding access to
lower cost supply, wtrile factoring in the cost of compliance with greenhouse gas (GHG)
emissions regulations when energy is transfened into the lSO. As such, the tranSer volumes
are a good indicator of a portion of the benefits attibuted to the ElM. Transfiers can trake place in
both the 1$Minute Market and Real-Time Dispatch (RTD).
Generatly, kansfer limits are based on transmission and interchange rights that participating
balancing authority areas make availabte to the ElM, with the exception of the PacifiCorp West
(pAGW -lSO transfer limit and the Portland General Electric (PGE) -lSO transbr limit in RTD.
These RTD transEr 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 ib transfer rights for
the ElM.
Table 2 provides the 15-minute and 5-minute EIM transfer volumes with base schedule
transfers excluded. The EtM entities submit inter-BAA transfers in their base schedules. The
benefits quantified in this report are only afrributable to the transfers that occuned through the
MPP/MA&F Copyrlght 2020 Callfornia ISO Page 5 of 21
$140
t120
6.$r00C.9
E*ogEI $60o6a8 $40
o
s20
I
so tr!t
ct4 cll
?o14
EI@03
2015
IPAC
nBsB@os04cll
EI
T
al
t
nnflBo'r 02 03 04
?o17
nln02 03 04
2016
*PSEI
EN
CI4 Q1
IEII-a;Q3
I
;
I
a2@qt
20'19
tBANG
2010
tPco
xi
JI,'ql;iu
WESTERN EIM BENEFITS REPORT THIRD QUARTER 2O2O
ElM. The benefits do not include any transfers attributed to transfers submitted in the base
schedules that are scheduled priorto the start of the ElM.
The transfer from BAA-x to BAA3 and the transbrfrom BAA3 to trAA:x are separately
reported' Forexample, if there is a 100 Megarvatt-Hour (ttMh) tanshrduring a S-minute
interual, in addition to a base hansfer trom lSo to NVE, it will be reporEd as 1fi) MV\rh
ftom-BAA lso to-BAA NEVP, and 0 tvlWh from_BAA NEVP to_BM lso in the opposite
direction. The 1 $minute transEr volume is the result of optimization in the l$minute market
using all bids and base schedules submitted into frre ElM. The $minute transGr volume is the
result of ofiimization using all bids and base schedules submitted into ElM, based on unit
commitments determined in the 1$'minute market optimization. The maximum trans6r
capacities beh^Een EIM entities are shorrm in Graph 2 below.
July
105,550
49,359 32,099
tPco 7,173
l6mln EIM transfer Smln Elill transfertonth From BAA To BAA
AZPS ctso 88,736 55,882
AZPS
AZPS
NFr/P
PACE
10,534
89,589
13,042
102,7il
ctso
SRP fi,722
10,469
31,167
8,609
AZPS
BANC
crso
crso
AZPS
BANC
crso NEVP
crso PACW
48,997
124,023
0
E3,ggg
il,527
1U,497
10,107
91,413
PGE 2,092
P\A'RX
crso
clso
crso
SRP 151,490
11,059
8,156
NEVP
PACE 54,909
6,239
20,297
142,589
57,330
14,472
NEVP
lPco
tPco
rPco
rPco
rPco
NEVP
PACW
ctso
PSEI
AZPS
SCL
42,221
7U
3,795
5,920
93,521
38,946
7(x)
3,300
5,819
61,929
33,034 32.429!PCO
PACE 93,845
NB/P
PACE
NEVP
AzPS
MPP/MA&F
PACE
Copyrigtrt 2020 California tSO
5,512
PeSc 6 of 21
16,802NFt/P 33,950PACE
19,92021,829PACEPAO,V
00PACESRP
83,959crso66,562PACW
12,913rPco14.115PACI/V
14,73916,374PACWPGE
7,2378,805PSEIPACW
637scL808PACW
crso
108,798
8,3638,499
105,950
PGE
PGE PAGI'V
0PSEI0PGE
5,2*6,202PGESCL
0IPGO0PSEI
109,131101,045PSEIPAO/V
0PGE0PSEI
PSEI
10,894
5,820P\A'RX
scL 11,200
4,286
PSEI
nr/ru(crso 0
36,976
0
39,443PSEIn /ru(
12,116rPco11,981scL
8,9)6PAO'V 7,WscL
5,6385,108SCLPGE
20,75518,097PSEIscL
57,796AZPS47,893SRP
110,191123,961SRPctso
00SRPPACE
139,421crso202,206AZPS
15,477 20,981
40,613
AZPS
AZPS
NEVP
PACE
17,256SRP
32,1U
21,425AZPS
crsoBANC
42,128
21,08028,111
27,538clsoAZPS
138,589117,770ctsoBANC
WESTERN EIM BENEFITS REPORT THIRD QUARTER 2O2O
NEVP 62,994
MPP/MMF
ctso
Copyrlght 2020 California l5O
79,345
P.g. 7 of 21
WESTERN EIM BENEFITS REPORT THIRD QUARTER 2O2O
0
23,699
3,931
August
crso PACI,V
crso PGE 2,566 7 688
crso Pl
'ru(
8,464 13,932
ctso SRP 71,49 71,696
tPco NE\/P 50,096 38,(b2
rPco PACE 29,gog 24,036
rPco PA6W 37,098 11,475
rrco PSE!6,408 6,017
rP@ scL 4,377
7,901
4,595
8,029NEVPAZPS
NEVP ctso 132,173 89,219
NEVP lPco 25,953 31,123
NF/P PACE 31,08E 37,t/,1
PACE AZPS 109,751 90,050
PACE tPco 23,(xN 23,881
PACE
PACE
NEVP 105,347 79,529
44,910PAG1,V 37,945
PACE
PAC\AI
SRP 0 0
crso 51,123 91,404
PACW lPco 17,669 12,129
PAC!/V PGE 27,6E5 27,W
PACW PSEI 23,372 16,914
PAO/V scL 2,355 1,597
PGE crso 8,526 6,306
PGE PACI,V 90,754 9.1,806
PGE PSEI 0 0
PGE scL 7.141
0
5,627
PSEI rrco 0
PSEI PAC1,V 58,072 7]7,375
0PSEIPGE0
PSEI Pl/rrru(10,148
11,gog
11,175
PSEI scL 11 ,699
Pl rru(crso 0 0
PWRX PSEI
MPP/MA&F Copyright 2020 Califomta tSO
32,297
P4a I of 21
WESTERN EIM BENEFITS REPORT THIRD QUARTER 2O2O
9,55611,2CnrrcoscL
6,5174,474PACT/VSCL
4,906PGE3,756scL
12,63010,996PSEIscL
48,60238,101AZPSSRP
201,693crso207,A14SRP
0PACE0SRP
150,732187,364crsoAZPS
12,61012,241NE\'PAZPS
25,859PACE24,892AZPS
48,69055,85ESRPAZPS
9,83811,064crsoBANC
19,60815,171AZFScrso
149,762133,480ctsoBANC
crso 31,590
15,682
26,659
0
NE.\/P
PAO'Vctso
24.735
38,360
PGE
FJVR)(
6,137
25,(D0
crso
crso
crso SRP
28,414
82,67957,527
43,568NEVPtPco
8,553PACEtFco
3,29311
12.726
111,536PACWrPco
00rPcoPSEI
9,6709,538SCLtPco
8,7057,230NH/P
114,637
19,945
1{1,721
22,U9rrco
AZPS
crsoNEVP
NEVP
PACE
AZPS
NEVP
PACE
5,330
95,310
81,28283,616
3,280
107,020
rrcoPACE
69,05687.762NE1/PPACE
23,818PACWPACE
0SRPPACE
Sepfember
20,589
0
ctso 21,595
MPP/MA&F
PACW
cogyrlght 2020 callbrnla lSO
57,409
Pige 9 ot 21
WESTERN EIM BENEFITS REPORT THIRD QUARTER 2O2O
PAO/V 20,191 10,333
TABLE 2: Energy transfers (Mwh) in the FMM and RTD markets for e3 2020
trco
PACW PGE 43,429 &,417
PACI/y PSEI 52,1U
PACW SCL
61,539
2,W7 1,516
PGE ctso 11,655 11,092
PGE PACW 33,299 35,691
PGE PSEI 0 0
PGE SCL 2,42 2,102
PSEI rPco 0 0
PSEI PACW 20,909 29,667
PSEI PGE 0 0
PSEI PIA'RX 25,100 25,O29
PSEI scL 18,422 1711A
PlA'R,\ctso 0 0
P1/tR)(PSEI 22,180 28,373
scL tPco
SCL PAOA'1,507
5,(N0 3,312
2,q2
SCL PGE
scL PSEI
5,134
9,481
5,665
10,2%
SRP AZPS 40,059
SRP ctso 1go,7gg
SRP PACE 0
37,352
183,759
0
MPP/MA&F copyrlght 2020 califomia tso Pate 10 of 21
WESTERN EIM BENEFITS REPORT THIRD QUARTER 2O2O
nd
Fotr
fpartlo
PACWh PGE
Foll b
56
t}
u$Fo$
PSE lrPACW
I5l
,PAGb
fo
572
it od 23O fA75 <-rf'
fUofr&]*'
a{
-qm
dilt<li:n * bidimclionol
$[ ('danb 6o I HDwPrh0t];t?U
I ;o"f,.c*+ ! Milc-Srruct Conpory ol Noe ltiuxeo
i};=fl*,** !mffi:"'13vrmy'r r'lll
-;;;;JH*k ! ffi rrEono! Di't'id h'nr 'o"'}I ;: :-::s" lil;tr:r* u,v ri,,
i ffi*t-''-' i o"* Pm' h'tv'oi?i
Io* &rrruror.r?fiti BffiSr.|*oltirrrlonS.dS. g ky fhlt I Lcl lra1n, . C.loftrdo talny ro??ll,r Sol li$, H.iJ
Fl\rE l,o lPrfo
Povrerex <-> ls(.,
.las,**ffiH##*
' s,f- . .r ir *lJl.re *frr-*-Or'fafiCf rdr.i; Iif.;ilI5Jav J.*J.*d' n'* r'.
-.la&tLand
Elrar a of h{y ltEO
GRAPH 2: Estimated maximum transfer capacity (ElM entlties operating in Q3 2020)
I WHEEL THROUGH TRANSFERS
As the footprint of the Western EIM grows and continues to change, wheel-through transfers
may become more common-. Crrrenily, an EIM entity facilitating a wheel through receives no
direct financial benefrtioiir.ilit"ting the wheel; onlyihe sink and souroe directlybenefit. As part
of the Western EIM Gonsolidated liitiatives stakehblder progessf the ISO committed to
monitoring the wtreel through volumes to assess whethei, after the addition of nqi' EIM entities'
there is a potential future need to pursue a market solution to address the equitable sharing of
wtreeling benefits.
MPP/MA&F copyright 2020 Callfornla ISO Page u of 21
The ISO wil! continue to track the volume of wtreet-through transfers in the EIM market in thequartedy reports' ln order to derive the wtreel-througn tra-nsfersior eacn EIM BAA, ttrJlSO usesthe following calculation for every real-time interualiispatct,
' Total import summation of transfers above base transfers coming into the EIM B4,qunder analysis
o lotal export summation of all transErs above base transfers going out of the EIMBAA under analysis
o Net imPort the maximum of zero or the difference between total imports and totalexports
t Net export the maximum of zero orthe difference between total exports and totalimporE
t )Allr,elthrough: the minimum of the Eltt4 transfers into (total import) or EIM transferout (total export) of a MA for a given interuat
All wheel-through transfers are summed over both the month and the quarter. This volumereflects the totalrrvtreel-through transhrs for each EIM BIAA, regardless of tre potential paths
used to wheel through. The net imports and erports estimated in this section reflect the overailvolume of net imports ard exports; in contrast, the imports and exports prodded in Table 2reflect the gross transfers behreen two EIM BAAs.
WESTERN EIM BENEFITS REPORT THIRO QUARTER 2O2O
The metric is measured as energy in ltrtWh for each month and the corresponding calendarquarter, as shown in Tables 3 through 6 and Grafis 3 through 6.
MPP/MA&F Copyrlght 2020 Callfornta tSO PaEe 12 or 21
WESTERN EIM BENEFITS REPORT THIRD OUARTER 2O2O
BAA Net*qort Netlmport WhedThtortilt
AZPS
BANC
crso
trco
NEVP
PACE
PACW
PGE
PSE'
Htws(
sct
SRP 1 5
TABLE 3: Estlmated wheel'through transfers ln QB 2020
EB
;aIul
2,000,000
1,800,000
1,600,000
1,400,000
1,200,000
1,000,000
800,000
600,000
400,000
200,000
0 II rI llrr ![
AZP$ BAT.IC CISO IPCO NWP PACE PACW PGE PSEI F1'I'RX SCt SRP
rNcl Erport rNd lmport rWheel Tkough
GRAPH 3: Estlmated wheel'through transfers ln Q3 2020
oo&3so2r131r356,61.|
39,813
386,007
124,214
1,03t,720788,893
189,45805,625200,185
303.3171V2,7U216,7U2
E1,218326,732502,178
454,105100,031
118,690255,E60
104885176,(125
20,99081,77379,328
30,r3040,97969,817
MPP/MA&F Copyffi 2020 Callfornh ISO P.g! 13 of21
T'I'ESTERN EIM BENEFTTS REPORT THIRDQUARTER2OM
BAA Net Expoil Net tmport Wheel.Through
AZPS
BANC
crso
tPco
NEW
PACE
PACW
PGE
PSE'
PtttlF,r
scr
SRP
TABLE 4: Estlmated wheehthrough transferc ln July 2020
700.0m
600,000
500,@
t3
=
400.000
EDaCl!
3@.0m
200.0m
ilrt00,000 $;:f,I0 mmAZPS BANC CISO IPCO NEVP PACE PACW PGE PSEI PIA,RX SCL SRp
.Nct Export rNet lmport rtfyhoel Through
GRAPH 4: Estlmated wheet-through transferc ln July 2020
1@,704 60,240 sa@-
8,q)g l3/',W
366,663 223,tot 100,216
70,971 f 9,133
2A,220,
52,632 24/.,141 21,921
14,141 190,519
114,A17 23,455 8,m
15,2V/,53,060
10,350 3,627
36,555 9,249 10,996
1il,470 180,059 3,590
MPP/MAAF copyrlfht 2020 Callfornta lgo Pqc t4of 21
95,s3gilg96123,156
138,86221,162
438,302245,005
429,75267,155
106,21453,3U1
38,50863,7361S,945
1{5,205158.886350s,I
73i!,990101,M0
3l.gil8u3n
18,75226,002
11,37E21,59E
187,070248,462
WESTERN EIM BENEFITS REPORT THIRD OUARTER 2O2O
BAA Net Export Net lmport Wheel- Through
AZPS
BAA'C
crso
trco
NEVP
PACE
PACW
PGE
PSE'
Hturu(
sct
SRP
TABLE 5: Estlmated whee!-through transfers ln August 2020
.t3
=
Focut
8m,000
700,0m
E(x},0()0
5@.0@
400.m0
300.0m
2m.0@
100.m0
0
*l
SCL SRPtItItnn
AZPS BANC CISO lPCo NEVP PACE PACW PGE PSEI Pl/l'Rx
rNotEport rNet lmport rmeelThough
GRAPHS:Eetimatedwheel-throughtransfertlnAugust2020
MPP/}'AAF Copyrlght 2020 Callfornla ISO P.gG 15 of 21
WESTERN EIM BENEFITS REPORT THIRD QUARTER 2O2O
BAA
AZPS
BANC
c,so
tPco
NEVP
PACE
PACW
PGE
PSE'
PWRX
scL
SRP
Net Export Net lmport WheelThrough
124,isi I 51,775 I
!
I
I
I
I
I
I
I
l
:
I
I
I
112,273
9,843 150,409
g7o,g2s177,225 i 166,205
62,059
62,104
249,600
50,9b8
40,24ts
38,639
16,739 98,471
81.82160,282
19,954
'ide,701
20,899
111,756
42,245
57,790
.t
:
i
I
I
I
Ij
I
I
9,910
33,453
11,016
io;iiB
17,49 52,672
2035211,664
231,1 93 109,449 119
TABLE 6: Estimated wheel-through transfers in September 2020
E3E
PtUcul
700,000
600,000
500,000
400,000
300,000
200,0q)
100.000
0 il iili il li in n
)t_.
ill,Iln n ,.''.i
I
I
I
!
I
I
l
AZPS BANC CISO
, Net Export
lPcO NEVP PACE PACW pcE pSEt pltRx SCL
r,Net lnport Wtreel Through
SRP
GRAPH 6: Estimated wheel-through transfers ln September 202O
MPP/MA&F Copyright 2020 Californta ISO PaBe 16 of 21
WESTERN EIM BENEFITS REPORT THIRD QUARTER 2O2O
REDUCED RENEWABLE CURTAILMENT AND GHG REDUCTIONS
I ,n" *"r*m EIM benefit calculation includes the economic benefrts that can be attributed to
avoided renewable curtailment within the ISO footprint. lf not for energy transfers facilitated by
the ElM, some renewable generation tocated within the ISO would have been curtailed via
either economic or exceptional dispatch. The total avoided renewable curtailment volume in
MWh for e3 2O2O was calculated to be 16,014 Mla/h (July) + 11,158 MWh (August) + 10,376
ltlWh (September) = 37,548 MWh total.
There are environmental benefits of avoided reneurabte curtailment aswell. Under the
assumption that avoided renewable curtailments displace production from other resources at a
default emission rate of 0.428 metric tons CO/trtlVVh, avoided curtailments displaced an
estimated 16,071 metric tons of COz for Q3 2020. Avoided renewable curtailments also may
have contributed to an increased volume of reneuvable credits that would othenrise have been
unavailable. This report does not quantify the additional value in dollars associated with this
benefit. Total estimated reductions in the curtailment of renanrable energy along with the
associated reduc'tions in COz are shown in Table 7'
Year Quarter MVfi Eq' Tons CO2
1
2015 2
1 112,UO 48,U2
2016 2 158,806 67,969
I
4
33,094 14r1O{
10,01123,390
1 52,651 22,535
2017 2 67,055 28,700
23!331
18,060
9,986
4 7 t7*
28,18865.860
2018 129,128 55,267
3 19,032 8,146
231??
g:2,2il
132,937
33,843
10,0?6
22,365
56,897
3 14,445
15,08935,2544
3,792
7,521
354
1,553
17,-165
8,860
828
3,629
3
4
MPP/MA&F
2019
Copyrlgtrt 2020 California ISO PegeLT olzL
\A'ESTERN EIM BENEFITS REPORT THIRO QUARTER 2O2O
1 86,740 37J25
2020
1,2&),952
TABLE 7: Total reduction in curtailment of renewable energy and associated reducgons ln coz
I FLEXIBLE RAMPING PROCUREMENT DIVERSITY SAVINGS
The Westem EIM facilitates procurement of flexible ramping capacrty in the FMM to addressvariability that may occur in the RTD. Because variability across ditrerent EtAAs may happen inopposite directions' the flexible ramping requirement for the entire EIM footprint ."n U" tertthan the sum of indlvidual BAA's requlrements. This difference is knorn as flexible rampingprocurBment diversi$ savings. Starting in 2016, the ISO replaced the flexible ramping constraintwith flexible ramping products that provide both upard and downtyard ramping. rne minimumand maximum flexible ramping requirements for each BAA and fur each direction are listed inTable 8.
July
0 74
36 1,1 77
trco 65 224
NEVP down 19 233
PACE donn 79 345
dourr
2 147,514 63,136
3 37,il8
Total
16,071
ilg,452
MS
,lonth BAA Diroc{lon
up 30814
taximum
rcqulroment
Xlinimum
toqulrement
BANC up 5 71
crso up u2 16E6
trco up 40 217
NEVP
PACE
up
up
35
68 318
28
PACW 38
PGE
up
up
171
215
157PSE'
PWru<
57
30
45 't99
scr
up
up
up 3 2E
SRP up 28 151
ALL EIT 1,904
ATPS
up
down
.t53
24 272
8,4Nc
crso
down
down
dorn
MPP/MA&F
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Copyrlght 2020 caltfornla tSO
148
Psge lt of 21
WESTERN EIM BENEFITS REPORT THIRD QUARTER2O2!
up
BANC up 80
crso up 1,776
up 31
m
244
PGE
PSE'
it4
37
62Ptilru(
sct down
down
down
down
297
63
132
4
26dortrrSRP
r,€90dosmALL E!f,
270
80
1,776crso
AZPS
BANC
2'.|-7
420
35
21
7
up
up
up
up
trco
NEW 25
8g
215
298
318
17123
u
up
up
up
upPACE
PACW
PGE
15730PSE'
21654upPWil(
3scl
151
40
45
up
upSRP
2,ooo480upALL HN
27234dotffiiAZPS
980BANC
1,121
down
down 30crso
?,2434tFco
21435
douun
doi,nNEVP
34577do$,n
r483
PACE
PACW dortt
248&ilrnreE
244
38
37dqrnPSE'
20964Hilru(
63E
&u,n
dolf,nsct
132do{n
1,3&l
4
0down
SRP
ALL EII
August
28sAZPS
393
24
I
MPP/MA&F
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Copyrlght 2020 Callfornta ISO
170
Page 19 of 21
WESTERN EIM BENEFITS REPORT THIRD OUARTER 2O2O
NEVP 298
PACE 318
September
Table 8: Flexlble ramplng requirements
The flextble ramping procurement dlversi$ savings for allthe interuats averaged overthe monthare shonn in Tabb g. The percontage savings is the average MW savings oivioeo by the sum ofthe four individual BAA requiremenb.
July August September
Awnge MW saving
Sum of BAArequircments
Percentage savings 45%fio/o 4 So/o
Table 9: Flexible ramping procurgment dlverslty savings tn e3 2020
29
up
up
up
171
215
PACW
reE
PSE'up 150
PWH(up
64
25
5E
74
u
224
sct up 2 fi
SRP up 48 151
ALL E|T up tOl 4oao
AZPS down 272
81itc dom
34
6 24
c,so down 70 1.289
tPco down 20 224
NEVP down u 214
PACE (hffii 345
PACW down
81
20 148
down 213reE
PSE'down
27
29 232
PWn(dwn 69
scr down 3
232
63
SRP down u 132
ALL EIM down $1,791
ei5 969 906 to6 924 957
,699 1
MPP/MA&F Copyright 2020 Crltfomte ISO Page 20 of 21
WESTERN EIM BENEFITS REPORT THIRD QUARTER 2O2O
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 ttllw is defined
as the awarded flexible i"rping capacity in RTD minus its share, and the flexible ramping
surplus cost is defined as the flexible ramping surplus MW multiRlied by the flexible ramping
gtU-wlOe marginal price. A positive flexible ramping surplus lvlW 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 ftom 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-the-art tecfrnology to find and deliver low-cost energy to meet real-time demand'
the Western EIM demonstrates that utilities can realize financial and operational benefits and
reduce carbon emissions through increased coordination and optimization' Since ib inception in
November 2014, the cumulative gross egonomic benefits have reached $1'11 billion'
The western EIM provide significant environmental benefits through the reduction of
reneurable curtailments during periods of oversupply. sharing resouroes across a larger
geographic area reduces greenhouse gas emissions by using renewable generation that
otherwise would have been tumed off. The quantified environmental benefits from avoided
curtailments of reneuaable generafion ftom 2015 to-date reached il9,452 metic tons of GO2'
roughly the equivalent of aioiding the emissions from 115,520 passenger cars driven for one
year.
MPP/MA&F copyright 2020 California l5o Page 21 of 21