preliminary report on ercot pilot project for fast responding regulation service (frrs)
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Preliminary Report on ERCOT Pilot Project for Fast Responding Regulation Service (FRRS)
June 12th, 2013
2
OUTLINE
• Summary of Findings
• Questions for PDCWG
• Conventional Regulation Deployment and Frequency
• FRRS Up and FRRS Down performance
• FRRS-Pilot Resource’s ability to respond to sudden large
frequency deviation
• Measuring ERCOT deployed FRRS-up against rate of
change of Frequency and Regulation-up deployment
• Stakeholder Review Process
6/12/20132
ERCOT
3
Summary of FindingsBased on the first three months of observations;
1.The introduction of FRRS improves ERCOT’s ability to arrest frequency decay during unit trips.
2.FRRS Pilot Resources generally followed ERCOT FRRS deployments and responded automatically using local frequency detecting techniques.
3.When deployed, FRRS reduces the rate of change of frequency and regulation deployed to conventional Resources.
4.Observed lower quantities offered for FRRS-down and an overall lower performance for FRRS-down.
6/12/20133
ERCOT
4
Questions for the PDCWG
1. Can FRRS be part of Regulation Service?
2. If so, how much FRRS can participate in
Regulation Service?
3. If so, are there any recommended changes to
deployment logic of the pilot and what performance
criteria are recommended
6/12/20134
ERCOT
5
Conventional Regulation deployment and Frequency
6/12/20135
ERCOT
6
Response from Conventional Resource
59.84
59.86
59.88
59.9
59.92
59.94
59.96
59.98
60
60.02
60.04
350
365
380
395
410
425
440
455
470
485
500
20:13:12 20:13:55 20:14:38 20:15:22 20:16:05 20:16:48 20:17:31
Frequency
MW
Conventional Unit Expected Generation Conv Unit Output Frequency
6/12/20136
ERCOT
7
Response from FRRS Resource
6/12/2013
0
3
6
9
12
15
18
21
24
27
30
59.84
59.86
59.88
59.9
59.92
59.94
59.96
59.98
60
60.02
60.04
20:13:12 20:13:55 20:14:38 20:15:22 20:16:05 20:16:48 20:17:31
MW
Frequency
Frequency FRRS Deployment FRRS Resource Output
7ERCOT
8
Response from Conventional and FRRS Resources
0
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
350
360
370
380
390
400
410
420
430
440
450
460
470
480
490
500
20:13:12 20:13:55 20:14:38 20:15:22 20:16:05 20:16:48 20:17:31
FRRS MW Output
Conventional Resources MW
Conventional Unit Expected Generation Conv Unit Output FRRS Deployment FRRS Resource Output
6/12/20138
ERCOT
9
FRRS Performance
6/12/20139
ERCOT
10
05-22-2013 Frequency event
6/12/2013
59.7
59.72
59.74
59.76
59.78
59.8
59.82
59.84
59.86
59.88
59.9
59.92
59.94
59.96
59.98
60
-5000
-2500
0
2500
5000
7500
10000
12500
15000
17500
20000
22500
25000
27500
30000
32500
21
:11
:02
21
:11
:05
21
:11
:07
21
:11
:10
21
:11
:12
21
:11
:15
21
:11
:17
21
:11
:20
21
:11
:23
21
:11
:25
21
:11
:28
21
:11
:30
21
:11
:33
21
:11
:35
21
:11
:38
21
:11
:41
21
:11
:43
21
:11
:46
21
:11
:48
21
:11
:51
21
:11
:53
21
:11
:56
21
:11
:59
21
:12
:01
21
:12
:04
21
:12
:06
21
:12
:09
21
:12
:11
21
:12
:14
21
:12
:17
21
:12
:19
21
:12
:22
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:12
:24
21
:12
:27
21
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:29
21
:12
:32
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:12
:35
21
:12
:37
21
:13
:01
21
:13
:04
21
:13
:06
21
:13
:09
FrequencyKW
KW Frequency
10ERCOT
11
03-30-2013 High Frequency Event
6/12/2013
60 Hz
Frequency FRRS-Up Deployed FRRS Response
11ERCOT
12
Frequency FRRS-Up Deployed FRRS Response Regulation Deployed
Effect of FRRS-Up on Frequency and Reg-Up
6/12/2013
60 Hz
12ERCOT
13
FRRS Impact on RoCoF
6/12/201313
ERCOT
24.70
18.1422.24
12.44
0.00
5.00
10.00
15.00
20.00
25.00
30.00
30 seconds before FRRS deployment 30 seconds after FRRS deployment
Rate
of ch
ange
of F
requ
ency
(mHz
/30
seco
nds)
Rate of change of Frequency (mHz/30 seconds)
without FRRS (1/1/2013~2/25/2013) with FRRS (2/26/2013~5/20/2013)
14
FRRS Impact on Reg-Up Deployment
6/12/201314
ERCOT
15
Additional Analysis Underway Using KERMIT
• KERMIT is a Matlab/Simulink/Excel based platform used for simulating daily system operation with 1 second resolution.
• Capable of providing an assessment of a system’s ability to achieve adequate balancing and maintain system frequency
• Once the KERMIT model is calibrated and the deployment and un-deployment logic of FRRS are added, it can be used to study impacts of FRRS in the ERCOT system.
6/12/201315
ERCOT
16
Stakeholder Review Process
• ERCOT discussed progress of FRRS-pilot and some performance data with ETWG and PDCWG in March, April and May 2013
• More discussions in June with the various subcommittees (ID options)
• TAC July 2 (Update on Pilot and outline options)
• BOD July 16 (Present update and options)
6/12/201316
ERCOT
17
Appendix
6/12/201317
ERCOT
18
Purpose of FRRS PilotThe pilot governing document states the purpose of the pilot project is to: 1.Determine whether FRRS can improve ERCOT’s ability to arrest frequency decay during unit trips
2.Determine the optimal means of deploying FRRS by testing various deployment methodologies
3.Determine whether FRRS can reduce the need for Regulation Service and thereby reduce total Ancillary Service costs
4.Assess the operational benefits and challenges of deploying FRRS
5.Provide data for ERCOT to determine the appropriate settlement treatment for Resources providing FRRS, including possible “pay-for-performance” methods such as those being developed in response to FERC Order 755.
6/12/201318
ERCOT
19
FRRS Pilot Overview• FRRS pilot deployment obligations began on Feb.
25, 2013 at hour ending 11. • When the pilot began, there were 32 MW FRRS UP
and 30 MW FRRS DOWN qualified to participate.• Additional 1 MW FRRS UP and DOWN began
participating on Mar. 16, 2013.• All the qualified resources completed the
qualification tests.• ERCOT has made FRRS parameter changes twice
and more parameter changes are expected during the course of pilot
6/12/201319
ERCOT
20
Log of Parameter Changes
6/12/201320
ERCOT
Effective Date and TimeOperating Day 2-25-13 HE 11
Operating Day 3-30-13 HE 1
Operating Day 4-13-13 HE 1
Operating Day 6-3-13 HE 12
Band 1 High Trigger Frequency (Hz) 60.03 60.02 60.025 60.025
Band 2 High Trigger Frequency (Hz) 60.05 60.05 60.05 60.05
Band 3 High Trigger Frequency (Hz) 60.09 60.09 60.09 60.09
Band 1 Low Trigger Frequency (Hz) 59.97 59.98 59.975 59.975
Band 2 Low Trigger Frequency (Hz) 59.95 59.95 59.95 59.95
Band 3 Low Trigger Frequency (Hz) 59.91 59.91 59.91 59.91
Capacity Deployment in Band 1 (%) 50 50 50 60
Maximum Deployment Time per Band (sec) 120 60 60 60
Recall Interval (sec) 12 12 12 12
Single Event Reset High Trigger Frequency (Hz)60.01 60.01 60.01 60.01
Single Event Reset Low Trigger Frequency (Hz)59.99 59.99 59.99 59.99
FAST RESPONDING REGULATION SERVICE PILOT PROJECT PARAMETER SETTINGS
21
Impact on Reg-up in Feb 2013
6/12/201321
ERCOT
22
April and May 2013 Performance
6/12/2013
April, 2013 FRRS-UP FRRS-DOWN
FRRS Resource A 98.51% 64.77%
FRRS Resource B 77.78% 100.00%
Total Average 88.15% 82.39%
May 1 – May 20, 2013 FRRS-UP FRRS-DOWN
FRRS Resource A 97.61% 50.00%
FRRS Resource B 60.15% 74.69%
Total Average 78.88% 62.34%
22ERCOT
23
Number of FRRS Deployments
6/12/201323 ERCOT
59.97
59.9859.975
24
Determination of max FRRS-pilot participation
6/12/201324 ERCOT
25
May 2013 Regulation-Up Usage Vs Procurement
6/12/201325 ERCOT
0
100
200
300
400
500
600
700
800
900
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Average Regulation-up usage Regualtion-up Procurement
26
FRRS-DN and FRRS-UP Payments
6/12/201326 ERCOT
Weekly Amounts RegDN RegUpWeek 1: Feb 25 – March 1 3,398.90$ 13,945.04$ Week 2: March 2 – March 8 4,991.93$ 21,030.26$ Week 3: March 9 – March 15 8,409.96$ 32,296.41$ Week 4: March 16 – March 22 8,075.95$ 42,612.98$ Week 5: March 23 – March 29 7,311.47$ 46,758.23$ Week 6: March 30 – April 5 5,657.40$ 34,874.22$ Week 7: April 6 – April 12 -$ 29,764.97$ Week 8: April 13 - April 19 275.69$ 35,874.98$ Week 9: April 20 - April 26 422.89$ 46,954.49$ Week 10: April 27 - May 3 311.84$ 42,576.55$ Week 11: May 4 - May 10 838.60$ 41,055.06$ Week 12: May 11 - May 17 916.71$ 40,068.79$ Week 13: May 18 - May 24 480.14$ 16,562.89$
Total Payments $485,466.35
27
OD 2-25-13 thru OD 5-20-13 Market Clearing Prices
6/12/201327 ERCOT
Regulation Down MCPC Price Average Minimum $0.01 $1.55Maximum $101.00 $21.24Average $6.49 -
Regulation Up MCPC Price Average Minimum $0.95 $1.89Maximum $52.12 $28.39Average $9.09 -
28
FRRS-DN Award Amounts
6/12/201328 ERCOT
29
FRRS-UP Award Amounts
as of May 29 1100hrs
30
FRRS-DN Performance
6/12/201330 ERCOT
31
FRRS-Up Performance
6/12/201331 ERCOT
32
Performance Rate for First 13 Weeks
6/12/201332 ERCOT
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