Final Report on Fast Responding Regulation Service (FRRS) Pilot Project

TACMarch 27th, 2014

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FRRS Pilot Overview

1. November 13, 2013: Board Approval

2. February 25, 2013: First day of Pilot

3. July 16, 2013: ERCOT Board approves request to extend

the FRRS pilot to February 28, 2014

4. February 28, 2014 Pilot project ended

5. Three Resources participated in the pilot– Participant 1 was a nominal 36 MW battery in Winkler/Ector County

– Participant 2 was a nominal 1 MW battery in Harris County

– Participant 3 was a nominal 0.1 MW fleet Electric Vehicle Charging Station in

Tarrant County

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Summary of Findings1. 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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FRRS Performance

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FRRS Performance by Month Month FRRS-UP FRRS-DNFeb 25 - 28 2013 74% 68%March 2013 89% 80%April 2013 98% 75%May 2013 94% 62%June 2013 95% 15%July 2013 92% 6%August 2013 92% No offersSeptember 2013 92% No offersOctober 2013 90% No offersNovember 2013 97% No offersDecember 2013 93% No offersJanuary 2014 95% No offersFebruary 2014 99% No offers

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FRRS Performance

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FRRS Performance

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Detect and Respond (60 cycles) to low Frequency

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59.7

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FrequencyKW

KW Frequency

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Rate of Change of Frequency (RoCoF)

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Month/ Day

Average MW Deployed

Average RoCoF prior to FRRS-up Deployment (mHz/30 Sec)

Average RoCoF after to FRRS-up Response (mHz/30 Sec)

January, 2013

0.00 21.79 17.31

Feb 1 to Feb 24

0.00 27.61 18.96

Feb 25 to Feb 28

12.05 23.44 11.76

Mar-13 14.40 23.38 12.03

Apr-13 11.57 19.57 13.40

May-13 12.45 18.36 12.61

Jun-13 14.15 15.66 9.66

Jul-13 14.57 14.24 9.66

Aug-13 13.08 13.52 8.76

Sep-13 11.08 16.85 9.34

Oct-13 14.42 17.95 11.07

Nov-13 14.38 19.40 11.60

Dec-13 11.07 16.09 10.53

Jan-14 10.20 17.12 9.92

Feb-14 10.26 16.56 10.23

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Rate of Change of Regulation-Up Deployments

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Month/ Day Average MW Deployed

Average Rate of Change of Regulation-Up deployed prior to FRRS-up Deployment (MW/30 Sec)

Average Rate of Change of Regulation-Up deployed after FRRS-up Response (MW/30 Sec)

January, 2013 0.00 69.25 36.91

Feb 1 to Feb 24 0.00 77.15 42.03

Feb 25 to Feb 28 12.05 80.35 18.61

Mar-13 14.40 80.12 21.32

Apr-13 11.57 64.70 25.24

May-13 12.45 62.32 32.17

Jun-13 14.15 59.10 32.35

Jul-13 14.57 58.41 27.77

Aug-13 13.08 55.29 28.05

Sep-13 11.08 64.20 31.51

Oct-13 14.42 64.68 28.46

Nov-13 14.38 61.09 27.15

Dec-13 11.07 61.05 27.31

Jan-14 10.20 51.34 27.42

Feb-14 10.26 50.30 27.85

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Final Cost

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Original Payments Final Payments % Change

Total FRRS Payments (UP and Down) $1,907,681.01 $1,781,291.54 -6.6%

FRRS UP Month Original Payments Final Payments % ChangeFeb 25 - 28 2013 $10,183.36 $7,612.72 -25.24%March 2013 $158,130.04 $139,681.61 -11.67%April 2013 $157,402.14 $154,135.96 -2.08%May 2013 $171,071.32 $160,598.05 -6.12%June 2013 $166,055.04 $155,912.66 -6.11%July 2013 $118,330.14 $109,445.57 -7.51%August 2013 $181,810.68 $167,821.18 -7.69%September 2013 $129,126.92 $120,557.16 -6.64%October 2013 $124,302.80 $112,829.60 -9.23%November 2013 $103,418.80 $96,752.80 -6.45%December 2013 $91,180.40 $84,671.80 -7.14%January 2014 $114,997.76 $109,405.20 -4.86%February 2014 $335,605.71 $334,676.32 -0.28%Total $1,861,615.11 $1,754,100.63 -5.78%

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Final Cost FRRS-Down

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FRRS Down Month Original Payments Final Payments

% Change

Feb 25 - 28 2013 $3,057.90 $2,206.30 -27.85%

March 2013 $31,319.71 $18,184.86 -41.94%

April 2013 $4,267.12 $3,302.87 -22.60%

May 2013 $3,814.09 $2,593.68 -32.00%

June 2013 $2,840.93 $865.48 -69.54%

July 2013 $766.15 $37.72 -95.08%

August 2013 $0.00 $0.00 0.00%

September 2013 $0.00 $0.00 0.00%

October 2013 $0.00 $0.00 0.00%

November 2013 $0.00 $0.00 0.00%

December 2013 $0.00 $0.00 0.00%

January 2014 $0.00 $0.00 0.00%

February 2014 $0.00 $0.00 0.00%

Total $46,065.90 $27,190.91 -40.97%

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Post Pilot

• NPRR 581 became effective on Operating Day 3-1-14

• Resources can offer in and participate in Regulation and

follow a Fast Responding Regulation Signal

• ERCOT continues to benefit from Resources providing

FRRS

• Future Ancillary Service Team (FAST) continues to

work on improving Ancillary Services. (Definition of

services, procurement, deployment and settlement)

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