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

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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.

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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

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Conventional Regulation deployment and Frequency

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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

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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

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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

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FRRS Performance

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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

21

:12

:24

21

:12

:27

21

:12

:29

21

:12

:32

21

:12

:35

21

:12

:37

21

:13

:01

21

:13

:04

21

:13

:06

21

:13

:09

FrequencyKW

KW Frequency

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03-30-2013 High Frequency Event

6/12/2013

60 Hz

Frequency FRRS-Up Deployed FRRS Response

11ERCOT

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Frequency FRRS-Up Deployed FRRS Response Regulation Deployed

Effect of FRRS-Up on Frequency and Reg-Up

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60 Hz

12ERCOT

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FRRS Impact on RoCoF

6/12/201313

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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

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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.

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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)

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Appendix

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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.

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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

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Log of Parameter Changes

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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

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Impact on Reg-up in Feb 2013

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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

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Number of FRRS Deployments

6/12/201323 ERCOT

59.97

59.9859.975

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Determination of max FRRS-pilot participation

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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

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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 -

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FRRS-DN Award Amounts

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FRRS-UP Award Amounts

as of May 29 1100hrs

30

FRRS-DN Performance

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FRRS-Up Performance

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Performance Rate for First 13 Weeks

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