20190524Quarterly Report.pdf

3Iffi*.RECEIVEO
i$19 ?4AY Ztt Pl'l h: hb
,*J,?fff#*?*h18t'o*
An IDACORP Company
JULIA A. HILTON
Senior Counse!
ihi [e-mail]
May 24,2019
VIA HAND DELIVERY
Diane M. Hanian, Secretary
ldaho Public Utilities Commission
472 West Washington Street
Boise, Idaho 83702
Re Case No. IPC-E-16-19
Deferral and Recovery of Costs Associated with Participation in Energy
lmbalance Market - California Independent System Operator's ("CAISO")
First Quarter 2019 Western Energy lmbalance Market ("EIM') Benefits
Report
Dear Ms. Hanian:
Pursuant to Order No. 33706 issued in Case No. IPC-E-16-19, ldaho Power
Company ("ldaho Power" or "Company") hereby submits four (4) copies of the quarterly
CAISO Western EIM Benefits Report ("Report") for the first quarter of 2019. The Report
presents CAISO's quantification of benefits associated with participation in the Western
ElM. For the first quarter of 2019, CAISO estimated Western EIM gross benefits of $8.45
million for ldaho Power.
ldaho Power believes that the EIM has provided financia! benefits to the Company
and, ultimately, its customers. However, ldaho Power believes that CAISO's calculation
of benefits for the Company is overstated. This conclusion is primarily based on several
of CAISO's modeling assumptions related to the costs of Company-owned resources.
Pursuant to ldaho Power's discussions with CAISO, CAISO revised its benefit
quantification methodology beginning in the fourth quarter o12018 based on one subset
of ldaho Power's concerns about its modeling assumptions.
!n compliance with Order No. 33706, ldaho Power is submitting concurrently with
this Report, its report detailing the costs incurred and benefits achieved in its first year of
EIM participation. The Company presents its methodology for determining EIM benefits
and its quantification of actual EIM benefits and discusses the Company's efforts with
CAISO to improve the methodology utilized in the quarterly benefit reports.
1221 W. ldaho St. (83702)
P.O. Box 70
Boise, lD 83707
Diane M. Hanian, Secretary
May 24,2019
Page 2
lf you have any questions regarding this Report, please contact Senior Regulatory
Analyst Mark Annis at [phone] or [e-mail].
Sincerely,
ulia A.ilton
JAH:csb
Enclosures
& Colifornio ISO
WESTERN EIM BENEFITS REPORT
First Quarter 2019 r r
www.westernElM,com
April 29,2019
WESTERN EIM BENEFITS REPORT FIRST QUARTER 2019
CONTENTS
EXECUTIVE SUMMARY 3
4
4
BACKGROUND
EIM BENEFITS IN Ql 2019
I NTER-REGIONAL TRANSFERS ..5
..9
14
15
18
WHEEL THROUGH TRANSFERS...................
REDUCED RENEWABLE CURTAILMENT AND GHG REDUCTIONS.........
FLEXIBLE RAMPING PROCUREMENT DIVERSITY SAVINGS
MQCRA Copyright 2019 California ISO Page 2 of 19
WESTERN EIM BENEFITS REPORT FIRST QUARTER 2019
ciry
EXECUTIVE SUMMARY
This report presents the benefits associated with
participation in the western Energy lmbalance
Market (ElM) for the first quarter of 2019. The
benefits include cost savings and the use of surplus
renewable energy.
[os
&
EIM is helping to displace less-clean energy supplies with surplus renewable energy that
otherwise may have been curtailed.
This analysis demonstrates the benefit of economic
dispatch in the realtime market across a larger EIM
footprint with more diverse resources and geography
201 I
Q1 BENEFITS
Ql 2019 Gross Benefits by Participant
Arizona Public Service
California ISO
(niilions $)
$8.20
$13.08
$8'45
$5.71
ldaho Power
NV Energy
PacifiCorp
Portland General Electric
Powerex
Puget Sound Energy
Total
$11.74
$7.23
$7.21
$85.38
-ElM Quarterly Benefit Report Methodology,
httos.//www.caiso.com/Documents/ElM BenefitMethodoloov.pdf
"The GHG emission reduction reported is associated Wth the avoided
curtailment only. The current market process and counterfactual methodology
cannot differentiate the GHG emissions resultlng from serving ISO load via the
EIM versus dispatch that would have occurred external to the ISO without the
ElM. For more details, see
http://www.caiso.com/Documents/GreenhouseGasEmissionsTrackino Reoort-
FreouentlvAskedQuestions. odf
$650.26 million
Morkat Opcrolor
I Colifornio ISO
EIM entity
f Acfw porticipont
! Plonned EIM entry 2020
I Plqnned EIM ent y 202 I
! Plonned EIM enrry 2022
22,365
45%
MQCRA Copyright 2019 California ISO Page 3 of 19
Sanle
Porllord
tlerti. \
Enetgy tflvrj
Gross benefits from EIM since November 2014 J
l**ptI
H
t-t!
&*
*
Solt Rive:oroj*l )i.t
Gross benefits realized due to
more efficient inter-and intra-
regionaldispatch in the Fifteen-
Minute Market (FMM) and Real-
Time Dispatch (RTD).
$8S.38M
ENVIRONMENTAL
Metric tons of COz** avoided
curtailments
OPERATIONAL
Average reduction in flexibility
reserves across the footprint
WESTERN EIM BENEFITS REPORT FIRST QUARTER 2019
BACKGROUND
The 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 on October 1,2016, and Portland General Electric began participating on October
1,2017. ldaho Power and Powerex began participating on April 4,2018. Most recently, the
Sacramento Municipal Utility District (SMUD), part of the Balancing Authority of Northern
California (BANC), began participating on April 3,20191. The EIM footprint now includes
portions of Arizona, California, ldaho, Nevada, Oregon, Utah, Washington, Wyoming, and
extends to the border with Canada. The EIM facilitates renewable resource integration and
increases reliability by sharing information between balancing authorities on electricity delivery
conditions across the EIM region.
The ISO began publishing quarterly EIM benefit reports in January 2015. Prior reports can be
accessed at https.//wmv.westerneim.com/Paqes/AbouUQuarterlvBenefits.aspx.
I EIM BENEFITS IN Q1 2019
Table 1 shows the estimated EIM gross benefits by each region per month2. The monthly
savings presented in the table show $14.08 million for January, $40.26 million for February, and
$31.04 million for March with a total estimated benefit of $85.38 million for the quarter. Higher
benefits in February and March were driven by increased transfers compounded with higher
energy prices.
Region January February March Total
APS
/so
lPco
NVE
PAC
PGE
PWRX
PSE
Total
TABLE 1: First quarter 2019 benefits in millions USD by month
t SRNIC/Sr\4UO will be included in the quarterly benefits report starting in Q2 2019
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.
$1.10 $4.76 $2.34 $8.20
$1.25 $5.63 $6.20 $13.08
$1.64 $4.21 $2.60 $8.45
$1.09 $2.20 $2.42 $5.71
$5.56 $11.01 $7.19 $23.76
$1.36 $5.36 $5.02 $11.74
$1.23 $2.91 $3.09 $7.23
$0.85 $4.18 $2.18 $7.21
$14.08 $40.26 $31.04 $85.38
MQCRA Copyright 2019 California ISO Page 4 of 19
WESTERN EIM BENEFITS REPORT FIRST QUARTER 2019
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 Fifteen-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)-|SO transfer limit and the Portland General Electric (PGE)-ISO 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 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
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 BAA_y and the transfer from BAA_y to BAA_x are separately
reported. For example, if there is a 100 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 15-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 15-
minute market optimization. The maximum transfer capacities between EIM entities are shown
in Graph 1 below.
Month From
BAA
To
BAA
15min EIM
transfer
Smin EIM
transfer
(15m - base)
AZPS crso 163,672 127,',183
AZPS NEVP 8,471 11,289
AZPS PACE 8,614 15,975
PWRX crso 10,806 40,547
PWRX PSEI 22,508 13,933
CISO AZPS 14,376 24,891
CISO PWRX 20,473 37,502
MQCRA Copyright 2019 California ISO Page 5 of 19
17,633CISOPACW13,660
48,466IPCONEVP65,219
IPCO PACW 9,155 17,511
5,297 4,798NEVP
94,336
13,217
54,001
crso
PACE
135,018
41,750
NEVP
NEVP
NEVP
120,937PACEAZPS148,219
PACE IPCO 47,048 56,553
85,123PACENEVP98,495
PACE
PACW
PACW
tPco
PACW 20,310
48,830
29,284
37,370
93,804
57,684PACW
PACW PSEI 49,900 43,861
oso 6,934 7,318PGE
PGE PACW 15,839 17J06
PWRX 38,161
PSEI PACW 30,759 26,386
174,412
17,136NEVP9,046
'195,015
PWRX CISO 8,358 29,965
crso AZPS 11,843 20,2',t5
PWRX
WESTERN EIM BENEFITS REPORT FIRST QUARTER 2019
January
Copyright 2019 California ISO Page 6 of 19
43,388CISONEVP26,46',1
22,603CISOPGE11,447
tPco PACE 11,14 1,337
AZPS
IPCO 7,991
CISO 74,258
PGE 59,252
PSEI 31,913
AZPS clso
AZPS
AZPS PACE 6,615 10,568
PWRX PSEI 32,635 24,372
crso 26,747 56,363
MQCRA
WESTERN EIM BENEFITS REPORT FIRST QUARTER 2019
crso NEVP 28,759 47,817
CISO PGE 24,932 45,611
IPCO PACE 1,847
rPco PACW 36,277
NEVP AZPS 2,700
NEVP CISO 134,958 95,479
NEVP rPco 7,959 12,527
NEVP 45,311 6',t,457
PACE AZPS 104,361 96,904
PACE rPco 25,900 32,644
PACE NEVP 69,535 59,355
PACE PACW 22,499 31,146
PACW crso 55,088 63,121
PACW IPCO 34,453 26,763
PACW PGE 72,913 75,099
PACW PSEI 64,463 58,874
PGE ctso 15,978
PGE 7,659 8,243
PSEI PWRX 28,527 28,759
PSEI PACW
AZPS CISO 119,271 114,418
AZPS PACE 87,467 105,988
PWRX PSEI 5,584 5,280
08,821
ctso PWRX 130,714 161,877
February
MQCRA Copyright 2019 California ISO Page 7 of 19
CISO PACW 29,968 37,256
tPco NEVP 82,473 62,435
2,451
51,301
PACE
16,824
PACW
39,891 35,174
AZPS NEVP 2,320 3,531
PWRX CISO 1,100 7,907
clso AZPS 95,191
CISO PACW 42,997 58,509
tPco NEVP 60,982 42,648
tPco PACW 55,133 67,375
NEVP CISO 180,201 1 10,043
NEVP PACE 104,963 5,62611
PACE rPco 16,565 20,955
PACE PACW 28,224 34,229
PACW tPco 36,512 24,277
PACW PSEI 63,772 63,387
PGE PACW 39,146 49,546
PSEI PACW 30,382 29,769
WESTERN EIM BENEFITS REPORT FIRST QUARTER 2019
March
TABLE 2: Energy transfers (MWh) in the FMM and RTD markets for Q1 2019
MQCRA Copyright 2019 California ISO Page 8 of 19
ctso NEVP 103,306 108,577
crso PGE 58,216 91,'156
tPco PACE 20,297 13,817
NEVP AZPS 5,660 5,556
rPco 41,577 48,951NEVP
65,902PACEAZPS59,637
95,139 62,051PACENEVP
PACW CISO 42,253 55,294
PGE 45,011 43,871PACW
PGE crso 10,814 11,142
PSEI PWRX 38,625 32,000
WESTERN EIM BENEFITS REPORT FIRST QUARTER 2019
Poft 66
Pofi 66 (
Polo Verde,
+one direction e biJirectionol
I colifornio lso I MNC/SMUD
! PocifiCorp ;1 Seottle City tight !flonred atry 2o2o)
! NV Energy $ Solt River Proiecl {plonned eotry 2O2O)
! Arizono Public Service I IADWP lflonned arry 2o2l)
I Po.tlond Generol Electric I Prbllc Service Compony o[ New Mexico
! Puger Sound Energy ly'onred entv 2021)
I faJo Power Compony ! NorthWestarn Energy lfonned eotrv 2o2ll
I po.ere, I Aristo lptonned entry 2022]
Meod 500 349
Meod 230 (APS <-> ISO)236f.Meod 230 (lSO to NVE)
Meod 230 (NVE to ISO) 3,476
3.4A3
IPCO to PACW (Poth 75) I,500
PACW to IPCO (Poth 75) 400-510
PACE IO IPCO 2,557
IPCO to PACE 1,550
NVE tO IPCO 262
IPCO lo NVE 390.478
Powerex <-> PSE r50
Powerex <-> ISO 150
Poth Estimoted Mox
Copocity (MWl
Polh 24 (west to eost)100
Polh 24 {eost to west)35-90
Eldorodo 797
Polh 35 [wesl lo eosl)580
Poth 35 (eost lo wesf 538
Gonder-Povont 130
PACW to PGE 320
Poth 66 (lSO to PGE)627
Poth 66 (PGE to l5O) 296
Poth 66 (lSO to PACW) 331
Poth 66 (PACW to ISO)432
Poth 17 0-400' 2
PSE lo PACW 300
Eldorodo SOOMoenkopi 732
Polo Verde, N. Gilo 3,151
Poth 78 IPACE to APS)625
Poth 78 (APS to PACE) 660
NovoioCrystol 522
' ls on optiaol pk ovoi/r,&c lq PACE PACW EM tonshrs ond lhe
copcity is o sub*t of PACHrcO/PCAPACE ond Poth 75 copcity.
7 When in u*, the ovoilobh copocity on PACEJK.O/IPCO?ACE ond
Pdh 75 will be sub*guuly redoccd by thc u*d oaovnt oa Pah I 7,
and not dqbh cqnted.
Curat os ol April 2Ol9
:r,
fa
J
GRAPH 1: Estimated maximum transfer capacity (ElM entities operating in Ql 2019)
r WHEEL THROUGH TRANSFERS
As the footprint of the EIM grows and continues to change, wheel through transfers may
become more common. Currently, 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
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 ISO will continue to track the volume of wheels through in the EIM market in the quarterly
MQCRA Copyright 20L9 California ISO Page 9 of 19
q(q
I
t
,t
!,
F'
L
J,
78
35
Meod
I s
WESTERN EIM BENEFITS REPORT FIRST QUARTER 2019
reports. ln order to derive the wheels through 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
Totalexport: summation of alltransfers above base transfers going out of the EIM 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 EIM transfers into (total import) or EIM transfer out
(total export) of a BAA for a given interval
Allwheel-throughs are summed over both the month and the quarter. This volume reflects the
total wheels through for each EIM BAA, regardless of the potential paths used to wheel through
The net imports and exports estimated in this section reflect the overallvolume of net imports
and exports; in contrast, the imports and exports provided in Table 2 reflect the gross transfers
between two 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 Figures 2 through 5.
BAA Net Export Net lmport Wheel Through
AZPS
ctso
tPco
NEVP
PACE
PACW
PGE
PSEI
PWRX
TABLE 3: Estimated wheelthrough transfers in Ql 2019
257,0O7 L26,t74 325,304
724,239 882,4t5 L6L,777
163,394 L30,030 t44,060
153,651 t37,735 456,023
576,786 262,13L 120,105
293,26L 1,60,733 351,,625
il,296 290,801 46,38L
128,155 1,47,337 62,79L
83,322 3t6,754 38,972
MQCRA Copyright 2019 California ISO Page 10 of 19
WESTERN EIM BENEFITS REPORT FIRST QUARTER 2019
B
o)
o)C
I.JJ
1,800,000
1,600,000
1,400,000
1,200,000
1,000,000
800,000
600,000
400,000
200,000
0 l1
AZPS
I I I Icrso tPco
E Net Export
NEVP PACE PACW
tNet lmport
PGE PSEI PI ,RX
sffieel Through
GRAPH 2: Estimated wheelthrough transfers in Ql 2019
BAA Net Export Net lmport WheelThrough
AZPS
ctso
tPco
NEVP
PACE
PACW
PGE
PSEI
PWRX
TABLE 4: Estimated wheelthrough transfers in January 2019
L20,364 338,007 26,408
3L,423 53,466 135,435
743,348 1-8,351 90,023
43,270 36,316 21,663
MQCRA Copyright 20L9 California ISO Page 11 of 19
n n n
55,095 51,088 LOO,O24
28,634 68,70L 38,887
252,092 30,878 40,804
19,408 75,383 5,163
33,822 55,205 20,8L6
WESTERN EIM BENEFITS REPORT FIRST QUARTER 2019
a
=
g,
oCIU
500,000
450,000
400,000
350,000
300,000
250,000
200,000
150,000
100,000
50,000
0 I
CISO IPCO
w Net Export
NEVP PACE
eNet lmport
PACW PGE PSEI
u \Afteel Through
GRAPH 3: Estimated wheelthrough transfers in January 2019
BAA Net Export Net lmport WheelThrough
AZPS
CISO
IPCO
NEVP
PACE
PACW
PGE
PSEI
PWRX
TABLE 5: Estimated wheelthrough transfers in February 2019
754,458 327,789 53,725
32,059 47,445 139,888
78,593 L7,795 145,835
43,238 62,2t9 2t,o57
MQCRA Copyright 2019 California ISO Page 12 of 19
n n
nttttI
114,306 31,157 88,28L
74,62!30,743 41,31"8
182,855 36,L19 37,763
15,399 1L1,274 9,787
40,524 71,508 13,903
WESTERN EIM BENEFITS REPORT FIRST QUARTER 2019
E
=
c')
oc
t.lJ
500,000
450,000
400,000
350,000
300,0@
250,0@
200,000
150,000
'100,000
50,000
0 rl ll I I
AZPS ctso rPCo
&Net Export
NEVP PACE
aNet lmport
PACW PGE PSEI
rWreel Through
GRAPH 4: Estimated wheelthrough transfers in February 2019
BAA Net Export Net lmpoft Wheel Through
AZPS
ctso
tPco
NEVP
PACE
PACW
PGE
PSEI
PWRX
TABLE 6: Estimated wheelthrough transfers in March 2019
449,4L7 2t6,620 82,L84
100,169 36,824 180,700
71,320 724,587 tls,765
4L,707 48,803 20,071
MQCRA Copyright 2019 California ISO Page 13 of 19
t]
n
il ntt TIt,
87,607 43,930 136,999
60,139 30,586 63,855
t4L,839 195,1.35 41,538
29,488 104,t44 31,43L
8,980 190,041 4,253
WESTERN EIM BENEFITS REPORT FIRST QUARTER 2019
700 000
600 000
500.000
a
= 400,000
=o)
o
tll
300,000
200.000
| .'\" ,
100,000 I I0AZPS CISO
M Net Export
IPCO NEVP PACE
rNet lmport
PACW PGE PSEI
n Wheel Through
GRAPH 5: Estimated wheelthrough transfers in March 2019
X REDUCED RENEWABLE CURTAILMENT AND GHG REDUCTIONS
The 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 2019 was calculated to be 8,216 MWh (January) + 6,243 MWh (February) + 37,795 MWh
(March) = 52,254 MWh total.
The environmental benefits of avoided renewable curtailment are significant. 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 22,365 metric tons of COz for Q1 2019. 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. Total estimated reductions in the curtailment of renewable energy along with the
associated reductions in COz are shown in Table 7.
MQCRA Copyright 2019 California ISO Page 14 of 19
n r-1il
nl TI
WESTERN EIM BENEFITS REPORT FIRST QUARTER 2019
Year Quarter MWh Eq. Tons CO2
2015
2016
2017
2018
2019
TABLE 7: Total reduction in curtailment of renewable energy along with the associated
reductions in CO2
T FLExIBLE RAMPING PROCUREMENT DIVERSITY SAVINGS
The 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 November 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.
1 8,860 3,792
2 3,629 1,553
3 828 354
4 17,765 7,521
112,948 48,342
158,806 67,969
33,094 14,164
23,390 10,011
1 52,651 22,535
2 67,055 28,700
3 23,331 9,986
4 18,060 7307,
1 65,860 28,188
2 129,128 55,267
3 19,032 8,146
23,425 10,026
52,2il 22,365
Total 810,116 346,649
MQCRA Copyright 2019 California ISO Page 15 of 19
1
2
3
4
4
1
WESTERN EIM BENEFITS REPORT FIRST QUARTER 2019
Minimum
requirement
Maximum
requirement
BAA Direction
crso 1,701
1,823
1,349down
PACE down 300
down
down
January
down
117 1,701
PGE
PWRX 234
MQCRA
February
Copyright 2019 California ISO Page 16 of 19
Month
AZPS up 25 185
up 189
NEVP up 32 152
PACE up 98 298
PACW up 51 137
PGE up 41 129
PSEI up 32 106
PWRX up 85 234
IPCO up 41 157
ALL EIM up 356
AZPS down 26 190
crso 143
NEVP down 18 152
64
PACW down 25 119
PGE 45 146
PSEI down 32 145
PWRX 64 230
tPco down 53 153
ALL EIM 146 1,484
AZPS up 26 18s
crso up
NEVP up 32 152
PACE up 98 298
PACW up 47 137
up 41 129
PSEI up 32 106
up 75
down
down
down
down '1,484
CISO 204 1,701
1,823
down 1,349ctso
PACE down
down
down
WESTERN ElM BENEFITS REPORT FIRST QUARTER 2019
March
MQCRA Copyright 201.9 California ISO Page 17 of 19
up 53 157lPco
ALL EIM up 266 1,823
down 23 190AZPS
crso 143 1,349
down 22 152NEVP
PACE 108 321
down 28 119PACW
38 146PGE
PSEI down 39 145
down 81 230PWRX
down 53 153rPco
ALL EIM 207
AZPS up 33 185
up
NEVP up 33 152
PACE up 93 298
PACW up 52 137
PGE up 39 129
PSEI up 44 106
up 66 234PWRX
157rPcoup47
up 274ALL EIM
AZPS down 21 190
232
NEVP down 12 152
98 321
PACW down 27 1'!9
146PGE44
down 43 145PSEI
230PWRX55
WESTERN EIM BENEFITS REPORT FIRST QUARTER 2019
tPco down 53 153
ALL EIM down 302 1,484
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 four individual BAA requirements.
January February March
Direction
Average MW saving
Sum of BAA requirements
Percentage savrngs
Table 9: Flexible ramping procurement diversity savings in Ql 2019
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.
r CONCLUSION
The first real-time wholesale power market of its kind in the Western United States, the EIM
uses state-of-the-art technology to find and deliver low-cost energy to meet real-time demand
across eight western states and a Canadian province. Since launching in November 2014, the
Western EIM has produced gross economic benefits of $650.26 million, demonstrating that
utilities can realize cost benefits and reduce carbon emissions through increased coordination
and optimization in the West.
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WESTERN EIM BENEFITS REPORT FIRST QUARTER 2019
Sharing resources across a larger geographic area, even if it's just in real-time, continues to
have a positive effect of reducing greenhouse gas emissions by using renewable generation
that otherwise would have been turned off. Use of this energy to meet demand across the EIM
footprint is likely replacing less clean energy sources. The quantified benefits from avoided
curtailments of renewable generation from 2015 to-date reached 346,649 metric tons of COz,
roughly the equivalent of avoiding the emissions from 72,881 passenger cars driven for one
year.
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