20200527Quarterly Report.pdf

<EHmr.
il':;CI IVED
":,i,,"; cl Pl'i 3:5E
An lo coPPcomp.rry
JULIA A. HILTON
Deputy General Counsel
[e-mail]
May 27,2020
Ms. Diane Hanian
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. Hanian:
Pursuant to Order No. 33706 issued in Case No. IPC-E-I6-19, ldaho Power Company
("ldaho Powe/' or "Company') hereby submits the quarterly CAISO Western EIM Benefits Report
("Report") for the first quarter of 2020. The Report presents CAISO's quantification of benefits
associated with participation in the Western ElM. For the first quarter of 2020, CAISO estimated
Western EiM gross benefits of $5.15 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 Regulatory Analyst Nicole
Blackwell at [phone] or [e-mail].
Sincerely,
L;,--y:(*-
Enclosure
Julia A. Hilton
e Colifornio ISO
WESTERN EIM BENEFITS REPORT
First Quarter 2020 r r r
www.wglbmElf .com
April 30,2020
WESTERN EIM BENEFITS REPORT FIRST QUARTER 2O2O
CONTENTS
EXECUTIVE SUMMARY 3
4
4
5
5
BACKGROUND..........
WESTERN EIM ECONOMIC BENEFITS !N QI 2020.........
CUMULATIVE EIM BENEFITS SINCE INCEPTION
INTER-REGIONAL TRANSFERS.
WHEEL THROUGH TRANSFERS 10
15
16
19
REDUCED RENEWABLE CURTAILMENT AND GHG REDUCTIONS ............
FLEXI BLE RAM PING PROCU REM ENT DIVERSITY SAVI NGS..
MPP Copyright 2020 California ISO PaBe 2 of 19
WESTERN EIM BENEFITS REPORT FIRST QUARTER 2O2O
EXECUTIVE SUMMARY
This report presents the benefits associated with
participation in the Westem Energy lmbalance
Market (ElM) for the first quarter of 2020.
The measured benefits of participation in the
Westem EIM 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 EIM footprint with more diverse resources and
geography.
Ql 2020 Gross Benefits by Participant
cilv
Psthnd
GcrcrclE*ric
2020
Ql BENEFITS
Arizona Public Service
BANC
Califomia ISO
ldaho Power
NV Energy
PacifiCorp
Portland General Electric
Puget Sound Energy
Powerex
Total
(millions $)
$11.26
$7.07
$9.57
$s.15
$5.36
$7.80
$6.93
$3.67
$1.09
$57.90
'ElM Quarterly Benefit Report Methodology,
httos://www.caiso.com/Documents/ElM BenefitMethodoloov.odf
*The GHG emission reduction reported is associated with the avoided
curtailment only. The cunent market process and counterhctual methodology
cannot difierentiate the GHG emissions resulting from serving ISO load via the
EIM versus dispatch that would have occuned extemal to the ISO without the
ElM. For more details, see
htto J/www.caiso.com/DocumentJGreenhouseGasEmissionsTrackinoReoort-
Freo uentlvAskedQuestions. odf
lr.fuOprotu
! cdiftxnio sO
tll .diry! fcrinpctlcipot
I Plorld ElM dtry 2920
I n*,ra fnrcory ZOal
! fUma eulorry zozz
$919.69 million
;
$sz.90M
37,125
460/o
MPP Copyright 2020 California ISO Page 3 of 19
WESTERN EIM BENEFITS REPORT FIRST QUARTER 2O2O
H 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 Power and Powerex began participating on April 4,2018. Most recently, the
Balancing Authority of Northern California (BANC)1, began participating on April 3, 2019. 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 2015. Prior reports are available
at https://www.westernei m.com/Paqes/AbouVQua rterlyBenefits. aspx.
I WESTERN EIM ECONOMIC BENEFITS IN Q1 2O2O
Table 1 shows the estimated EIM gross benefits by each region per month2. The monthly
savings presented show $17.21 million for January, $17 .42 million for February, and $23.27
million for March with a total estimated benefit of $57.90 million for the quarter.
Region January February March Total
APS
BANC
c,so
tPco
NVE
PAC
PGE
PSE
PWRX
Total
TABLE 1: First Quarter 2020 benefits in millions USD by month
' The benefits reflect the Sacramento Municipal Utility District as the participating resource within BANC.
2 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.
$4.10 $3.48 $3.68 $11.26
$1.66 s1.26 $4.15 $7.07
$2.57 $2.91 $4.09 $9.57
$1.66 $1.43 $2.06 $5.15
$1.10 $1.80 $2.46 $5.36
$2.22 $2.46 $3.12 $7.80
$2.46 $2.u $2.13 $6.93
$1.16 $1.23 $1.28 $3.67
$0.28 $0.51 $0.30 $1.09
$17.21 $17.42 $23.27 $s7.90
MPP Copyright 2020 California ISO Page 4 of 19
WESTERN EIM BENEFITS REPORT FIRST QUARTER 2O2O
I CUMULATIVE EIM BENEFITS SINCE INCEPTION
Since the start of the EIM in November 2014, the cumulative economic benefits have totaled
$919.69 million. The quarterly benefits have grown over time as a result of the participation of
new Balancing Authority Areas (BAA) in the market, which results in additional benefits for both
the individua! BAA but also compounds the benefits to adjacent BAA's by enabling further
transfers. Graph 1 illustrates the gross economic benefits of the EIM by quarter for each
participating BAA.
$ 120
.CISO EPAC ENEVP PSEI OAZPS TPGE IIPCO TPWRX TBANC
GRAPH 1: Cumulative gross benefits since the inception of the EIM
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 ElM. 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 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 PACW/PGE 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 1S-minute and S-minute EIM transfer volumes with base schedule
transfers excluded. The EIM entities submit inter-BAA transfers in their base schedules. The
00$
$80
$60
$40
$20
$0
oEe
=I
oEooooo
o
EHffiE@EHHEE
HI
EH
I
H
;
EEIE
o4
2014 2020172016
01 02 03
2015
04 01 Q2 03 04 01 02 03 04 01 Q2 03 Q4 01 A2 03 04 Ql
202020198
.*d
4
MPP copyright 2020 california lso Page 5 of 19
WESTERN EIM BENEFITS REPORT FIRST QUARTER 2O2O
benefits quantified in this report are only attributable to the transfers that occurred through the
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 BAAj and the transfer from 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
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 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
15min EIM
transfer
5min EIM
transfer
AZPS crso 146,580 118,035
AZPS NEVP 4,396 7,516
AZPS PACE 31,022 34,140
BANC crso 5,218 3,705
CISO AZPS
BANC
51,059 62,838
crso 102,749 115,280
ctso PWRX
NEVP
33,513 49,461
crso 70,572 94,165
ctso PACW 24,582 41,224
crso PGE 23,995
36,003
4,442
rPco NEVP 19,786
rPco PACE 11,976 10,826
lPco PACW 32,504 40,927
tPco PSEI 0 0
NEVP AZPS 6,365 4,578
NEVP ctso 82,274 40,914
NEVP IPCO 26,080 28,996
NEVP PACE 91,058 100,398
PACE AZPS 94,262 72,968
PACE rPco 52,866 63,932
PACE NEVP 45,373 30,234
MPP
January
Copyright 2020 California ISO Page 6 of 19
WESTERN EIM BENEFITS REPORT FIRST QUARTER 2O2O
PACE PACW 21,566 29,096
PACW crso 85,524 104,694
PACW rPco 45,622 29,565
PGE 42,483 44,254PACW
PSEI 21,578 23,446PACW
3,010PGEctso3,272
60,642PGEPACW57,741
2,309PGEPSEI1,947
38,452PSEIruvRx36,840
PSEI rPco 0 0
PSEI PACW 52,512 53,785
PSEI PGE 2,755 2,883
F{/r/RX crso 0
PWRX PSEI 12,029 15,666
AZPS ctso 110,197 84,590
AZPS NEVP 1,243 2,03',1
AZPS PACE 49,441 67,028
BANC ctso 15,318 12,762
crso AZPS 62,791 90,838
crso BANC 53,241 62,792
ctso PVVRX 50,290 61,2U
crso NEVP 125,094 129,734
crso PACW 24,058 38,847
PGE 26,134 48,985crso
rPco NEVP 26,689 17,026
PACE 39,221 30,664tPco
PACW 29,334 35,149tPco
2,160rPcoPESI1,300
AZPS 17,018 12,257NEVP
74,392NEVPcrso120,880
40,715NEVPtPco41,426
NEVP PACE 100,130 103,027
PACE AZPS 6'1,353 46,796
February
MPP Copyright 2020 California ISO Page 7 of 19
WESTERN EIM BENEFITS REPORT FIRST QUARTER 2O2O
PACE rPco 13,289 13,872
PACE NEVP 35,684 19,018
PACE PACW 9,754 17,294
PAC\,V crso 67,058 79,157
PACW rPco 29,470 20,974
PACW PGE 17,822 17,247
PACW PSEI 13,828 18,807
PGE crso 2,*5 2,104
PGE PACW 85,897 88,355
PGE PSEI 3,293 4,241
PSEI PWRX 31,655 32,500
PSEI rPco 3,941 2,749
PSEI PACW 57,737 60,498
PSE!PGE 2,81 2,588
PWRX crso 0 0
PlA'RX PSEI 8,880 10,174
AZPS crso 92,088 73,985
AZPS NEVP 1 721 4,2U
AZPS PACE 50,487 64,233
BANC ctso 19,643 15,780
CISO AZPS 57,988 73,220
crso BANC 62,205 68,134
CISO PWRX 42,058 54,981
NEVP 96,890clso 108,966
crso PACW 30,926 44,195
crso PGE 26,517 56,148
IPCO NEVP 32,182 23,767
rPco PACE 24,923 26,958
rPco PACW 37,485 54,883
tPco PSEI 0 0
NEVP AZPS 6,574 5,579
NEVP crso 125,012 89,517
NEVP tPco 35,922 47,472
MPP
March
Copyright 2020 California ISO Page 8 of 19
WESTERN EIM BENEFITS REPORT FIRST QUARTER 2O2O
PACE AZPS 38,155 29,4fi
PACE NEVP 30,556 17,372
PAO/V crso 66,383 75,005
PGE 31,274 31,354PACW
PGE oso 6,300 5,556
PGE PSEI 5,073 6,46
PSEI tPco 2,fi1 1,W
PSEI PGE 4,752 5,350
P\,\/RX PSEI 25,899 25,663
TABLE 2: Energy transfers (irwh) in the FillM and RTD markets for Ql 2020
MPP Copyrleht 2020 Callfornia ISO Page 9 of 19
WESTERN EIM BENEFITS REPORT FIRST QUARTER 2O2O
Po$Erlimorrd Mox
C"p".,ty (tlilt
Pofi 24 fwesl trc eosfl 100
Po$ 24 (cost to wcst)35-90
Eldorodo 797
Poth 35 fuesl fo eosfl 580
Polh 35 lcod lo nlar,l 538
GonderPovonl r30
PACWb PGE 320
Porh 66 (Ifi b reEl 627
Porh 66 fPGE ro
'SO,|
296
Po$ 66 fifi b PACWI 331
Po$ 66 Pofi66 (PACl/tttol50il 132
Pofi 17 o{@r z
PSE to PACW 300
E ldorodo 5 00l'{oenlopl 732
Polo tlardc, N. qh 3,'l5t
Pofi 78 6@
522
500 349
^^€od
230 fAPS <->,SO, 236f'Meod 230 f,SO b NYE, 3,43
hbUdq )L
tlrod23O (NWtolSOl 3,176
lrco b PACW lPolh z5) I,sOo
PACE lo IPCO 2,557
-a trcob PACE t,550
+one directioo e bklirectionol NVE b trcO 262
I colibnir so
I PoclfiCorp
! tW Energy
! Arizorr Public Scrvice
I Porrtond Ccneml Elecrrt
I Puea Sound Encrgy
! Uolo Powcr Compony
I Poror",
I aeNc @tcr2efiy2o2t!
Seotle Ciry Lighrglnn:dc*yNN)
S Soh River Prolecl (fumd any 20201
I ]ADWP tfunnd aty 20211
! Publk Senke Conrpony o[ Naw Mexico
bhnmd c,rry 202ll
! NorthWesbm Erergy lphaud d*ry 202 ll
I t rlck lnigolion Disfiict ldffid cnny 2O2l)
! Avisr (flnned onry 2022)
! fucson Electrk Power !fulrcdcnty 2022)
! Toconrc Pwrer lplonrcd atry 2022J
S Bonneville Power Adminishotion
lfuiudalrtry20221
trco b twE 390478
Powerex <-> PSE l5O
ro*ereil
' h o ql;mlp<ri mlobl b PACE+ACWEX,I lulr dd{'.
cop.ity it o td,rt 4 Pre{CO/?COII,CE an Pa$ 75 cryQ
) VJla n w, thc wlo6bcryty aPlrCEJfCOt'KQPfrood
Po$ 75 *l b ubryt* M by b uod oaatt a Pa* 1 7,qd hd dattJo.q,obd.
C,rmaJtuclr2019
GRAPH 2: Estimated maximum transfer capacity (ElM entities operating in Ql 2020)
I WHEEL THROUGH TRANSFERS
As the footprint of the Westem EIM grows and continues to change, wheel-through transfers
may become more common. Cunently, an EIM 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 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 potentialfuture need to pursue a market solution to address the equitable sharing of
wheeling benefits.
MPP Copyright 2020 California ISO Page 10 of 19
WESTERN EIM BENEFITS REPORT FIRST QUARTER 2O2O
The ISO 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:
o 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 import: the maximum of zero or the difference between total imports and total
exportso Nel export'. the maximum of zero or the difference between total exports and total
imports. Wheel through: the minimum of the EIM transfers into (total import) or EIM transfer out
(total export) of a BAA for a given interval
Allwheelthrough transfers are summed over both the month and the quarter. This volume
reflects the total wheel-through transfers for each EIM BAA, regardless of the potential paths
used to wheelthrough. 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.
BAA Net Export Net lmport Wheel Through
AZPS
BANC
c/so
tPco
NEVP
PACE
PACW
PGE
PSE/
PWRX
TABLE 3: Estimated wheel-through transfers in Ql 2020
237,528 181,011 218,657
246,73332,285
1,051,716 593,098 20'1,248
137,416125,432 162,999
248,060 89,481 385,682
326,984 438,008 84,689
357,zffi 354,935148,313
55,808167,047 201,921
212,129 84,877 61,317
29,587 237,667 22,007
MPP Copyright 2020 California ISO Page 11 of 19
WESTERN EIM BENEFITS REPORT FIRST QUARTER2O2O
1,800,000
1,800,000
1,400,@0
1,200,000
a3 1,ooo,ooo
=F soo,ooootrul 600,000
400,0m
200,0m
0 I
AZPS BANC CISO IPCO
IN6t Export
NEVP PACE PACW PGE PSEI P\ARX
INet lmport IVVheslThrough
IIIIT
GRAPI{ 3: Estimated wheel-thrcugh transfers in Ql 2020
BAA Net Export Net lmport WheehThrough
AZPS
BANC
crso
tPco
NEVP
PACE
PACW
PGE
PSE'
PWRX
TABLE 4: Estlmatsd wheel-through transfers in January 2O2O
3,721.115,327
26,753 77,760 M,810
152,580 101,859 43,690
47,800 77,483 18,189
7,416 79,735 8,260
MPP CopVright 2020 Glttomia ISO Page 12 of 19
WESTERN EIM BENEFITS REPORT FIRST OUARTER2O2O
3e
Et)
oc
UJ
000,000
500,0m
400,000
300,000
200,000
100,000
0 IIIIII
AZPS BANC CISO IPCO
INet Export
TABLE 5: Estimated wheel-through transfens in February 2020
PACW PGE PSEI P\'\,RX
rVvheelThrough
NEVF PACE
lNet lrport
GRAPH 4: Eetimded wheel-through transfers in January 2020
BAA Net Export Net lmport Wheel- Through
AZPS
BANC
crso
tPco
NEVP
PACE
PACW
PGE
PSE'
PWRX
12,783 63,100
45,710 38,732 39,677
78,731 183,309 18,336
19,66375,164 49,265
7,185 90,982 3,019
MPP Copyright 2020 Glifornia ISO Page 13 of 19
WESTERN EIM BENEFITS REPORT FIRST QUARTERzO2O
s3E
CD
ocul
600,(x)0
500,(n0
400,o00
300,000
200,000
100,000
0 I I I I I
AZPS BANC CISO IPCO
INet Export
NEVP PACE
!Net lmport
PACW PGE PSEI PIA,RX
rvVfleelThrough
GRAPH 5: Estimated wheehthrough tranefers ln February 2020
BAA Net Export Net lmport Wheel Through
AZPS
BANC
crso
tPco
NEVP
PACE
PACW
PGE
PSE'
PWru(
TABLE 6: Estlmated wheel-through transfers in March 2020
15,781 68,306
52,969 46,507 52,928
95,672 152,839 22,663
M,Og2 75,174 17,956
14,986 66,951 10,728
MPP CopVright 2020 Califomia ISO rue 14 of 19
WESTERN EIM BENEFITS REPORT FIRST QUARTER 2O2O
600 000
500.000
E
=(,,
otr
uJ
400
300
200
000
000
000
100,000 I'
tt]r kr ffir B k,L;0 t H t;
AZPS BANC CISO
o Net Export
IPCO NEVP PACE
i ,Net lmport
PACW PGE PSEI
aWheel Through
P\ /RX
GRAPH 6: Estimated wheel-through transfers in March 2020
I REDUCED RENEWABLE CURTAILMENT AND GHG REDUCTIONS
The Western EIM 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 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 Q1 2020 was calculated to be 23,977 MWh (January) + 33,575 MWh (February) +
29,188 MWh (March) = 86,740 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 COziMWh, avoided curtailments displaced an
estimated 37,125 metric tons of COz for Q1 2020. Avoided renewable curtailments also may
have contributed to an increased volume of renewable credits that would otherwise have been
unavailable. This report does not quantify the additional value in dollars associated with this
benefit. Totalestimated 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
,l 8,860 3,792
2 3,629 1,553
3 828 354
4 17,765 7,521
MPP
2015
Copyright 2020 California ISO Page 15 of 19
WESTERN EIM BENEFITS REPORT FIRST QUARTER 2O2O
I 2,94811 48,342
2 158,806 67,969
3 33,094 14,1U
4 23,390 10,011
1 52,651 22,535
2 67,055 28,700
3 23,331 9,986
4 18,060 7,730
1 65,860 28,188
2 129,128 55,267
3 19,032 8,146
4 23,425 10,026
1 52,254 22,365
2 132,937 56,897
3 33,843 14,485
4 35,254 15,089
1 86,740 37,125
Total 1,098,890 470,245
2016
2017
2018
2019
2020
TABLE 7: Total reduction in curtailment of renewable energy and the associated reductions in COz
I FLEXIBLE RAMPING PROGUREMENT 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.
Month BAA Direction Minimum
requirement
Maximum
requirement
AZPS up 21 230
BANC up 3 58
c/so up 37 1716
MPP Copyright 2020 California ISO Page 16 of 19
WESTERN ElM BENEFITS REPORT FIRST QUARTER 2O2O
tPco up 28 143
291NEVPup0
PACE up 78 252
PACW up #162
PGE up 35 206
PSE'up 27 158
PWRX up 51 23',1
ALL EITT up 36 1,962
down 11 275AZPS
down 8 95BANC
1,530c/so down 171
dourr 54 196tPco
NEVP down 0 267
291PACEdown80
PACW down 19 146
217PGEdown46
PSE'down 39 155
69 224PWp(down
1,957ALL EIM down 303
235AZPSup23
BANC up 4 53
1,634crsoup81
tPco up 28 't31
NEVP up 23 257
PACE up 75 291
PACW up 55 197
PGE up 24 206
PSE'up 27 't58
PWRX up 52 228
ALL EIM up 119 1,935
down 12 202AZPS
down 7 81
91 1 ,616
BANC
c/so down
January
MPP
February
Copyright 2020 California ISO PaSe 17 of 19
tPco down 59 210
NEVP down 17 259
PACE down 79 269
PACW down 30 140
PGE down 42 238
PSE/down 39 163
PWRX down 73 286
ALL EIM down 320 1,957
March
AZPS up 27 235
BANC up 3 53
crso up 201 1,652
tPco up 48 152
NEVP up 22 257
PACE up 81 269
PACW up 71 197
PGE up 40 206
PSE'up 38 158
PWRX up 63 228
ALL EIM up 277 1,935
AZPS down 23 227
BANC down 6 81
c,so down 95 1,616
tPco down u 210
NEVP down 19 284
PACE down 79 301
PACW down 45 140
PGE down 48 238
PSE/down 46 178
PWRX down 71 289
ALL EIM down 249 1,957
WESTERN EIM BENEFITS REPORT FIRST QUARTER 2O2O
Table 8: Flexible ramping requirements
MPP Copyright 2020 California ISO Page 18 of 19
WESTERN EIM BENEFITS REPORT FIRST 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.
January February March
Direction
Average MW saving
Sum of BAA requirements
Percentage savlngs
Table 9: Flexible ramping procurement diversity savings in Q1 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-the-art technology to find and deliver low-cost energy to meet realtime 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 $919.69 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 470,245 metric tons of CO2, roughly the equivalent of avoiding the
emissions from 98,867 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.
MPP Copyright 2020 California ISO Page 19 of 19
Up Down Up Down Up Down
715 769 806 821 830 814
1 606 11,73 1,699 1,781 1,807 1,770
46%44o/o 440/47o/o 46Yo 46Yo