ERCOT Pilot Project for Fast
Responding Regulation Service (FRRS)
September 7, 2012 TAC
Agenda
1. What is Fast Responding Regulation Service (FRRS)?
2. Purpose of the FRRS Pilot Program
3. FRRS Qualification and Performance Criteria
4. How Will FRRS be Procured (Priced and Paid For) in the Pilot?
5. Proposed Implementation Schedule for the Pilot
6. Potential Benefits of FRRS
7. Questions
8. Appendix
September 7, 2012
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What is Fast Responding Regulation Service (FRRS)?
1. FRRS is intended to complement current regulation
service.
2. FRRS can be ramped to its full output within 60 cycles.
3. FRRS is intended to respond first and help slow down the
frequency decay while other resources start to respond.
4. FRRS is intended to respond to large frequency drops to
promptly help arrest the frequency decay.
5. California ISO, New York ISO, PJM, ISO New England
and MISO will have or already have fast responding
regulation.
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Purpose of the FRRS pilot program
1. Gather and analyze data to assist in determining the potential
improvements in ERCOTs ability to arrest frequency decay during unit
trips due to the presence of FRRS.
2. Gather and analyze data to assist in determining the potential reductions
of current regulation that would be appropriate due to the presence of
FRRS.
3. Assess the operational benefit and challenges of procuring and deploying
FRRS.
4. Gather and analyze data to assist ERCOT in developing settlement
methodologies for FRRS and current regulation that use a pay for
performance approach similar to what is specified in FERC Order 755.
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FRRS-pilot Qualification Criteria
1. Resources providing FRRS must be able to follow FRRS
signal.
2. Resources requesting FRRS-up qualification
a) Must be able to respond to large frequency decay
triggered by loss of generation.
b) Resources providing FRRS-up must provide full MW
response within 60 cycles after frequency hits 59.91
Hz trigger.
3. Resources requesting FRRS-down qualification
a) Must be able to respond to high frequency.
b) Resources providing FRRS-down must provide full
MW response within 60 cycles after frequency hits
60.09 Hz trigger.
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Pilot FRRS Qualification Criteria (continued)
4. Resources providing FRRS (Up and Down)
must be able to continuously remain deployed
for up to 8 minutes with 95% or more of the
requested MW for successful qualification.
5. Resources that successfully demonstrate the
requirement above will be qualified as FRRS
capable Resources for the capacity that was
requested for qualification.
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FRRS Performance Criteria
Resources providing Fast Responding Regulation Service shall meet the following
performance criteria
1. MW response provided by Resources carrying FRRS in response to ERCOT FRRS
signal shall be at least 95% and less than 110 % of the ERCOT deployment instruction
for that Resource.
2. Failure of the above performance criterion during any deployment for 30% or more of
the deployments during any hour shall be deemed failure of the Resource’s obligation
for that hour.
3. When FRRS-up is not fully deployed, for sudden frequency decay where frequency
declines lower than 59.91 Hz, Resources providing FRRS-up shall within 60 cycles
appropriately respond to the declining frequency.
4. When FRRS-down is not fully deployed, for sudden frequency deviation that may
cause frequency to exceed 60.09 Hz, Resources providing FRRS-down shall within 60
cycles appropriately respond to frequency.
5. FRRS Resource must provide high speed data with resolution no less than 32
samples per second to demonstrate their performance for (3) and (4) above. ERCOT
will also review randomly selected deployments during deviations of lower magnitude to
verify compliance.
6. Failure to meet the deployment obligations during any hour as required in paragraph
(2) will lead to claw-back of capacity payment for that hour.
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How is FRRS Procured during the Pilot?
1. FRRS-up and FRRS-down amounts are specified in advance for each
hour. For the pilot, ERCOT will procure up to 65 MW per hour for
FRRS-up and will procure up to 35 MW per hour for FRRS-down. No
changes are made to the existing REGUP and REGDN requirements.
2. ERCOT has a list of “Qualified” FRRS Pilot Resources. Each Tuesday
QSEs inform ERCOT of the amounts available for Saturday through
Friday.
3. ERCOT prorates amounts to Pilot Resources as necessary.
Final
quantities sent to QSEs (for the upcoming week).
4. COPs for Pilot Resources shall reflect the final schedule as REGUP
and REGDN.
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How is FRRS is Priced and Paid for during the Pilot?
1. ERCOT
Settlements
performs
settlement
by
creating
appropriate SASM data cuts. Current REGUP and REGDN
bill determinants are used. A SASM is NOT executed by the
operators.
2. DAM clearing prices shall be used to price the FRRS
awards.
3. The cost for pilot MWs procured are paid for similar to other
AS.
4. Adjustments can be made depending on actual availability
and performance.
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Background Information and Pilot Schedule
1. Presented and discussed the FRRS Pilot Proposal with Market Participants in
June, July and August. (ETWG, WMS, ROS, and PDCWG)
questions received and answered.]
[Written
(Adjustments made to proposed Pilot
approach and Governing Document)
2. ERCOT presents FRRS Pilot Project to TAC at 9/7/12 TAC meeting.
3. Request approval for FRRS Pilot at the 9/18/12 BOD meeting.
4. Qualify Pilot Resources 10/18/12 through (end of pilot).
[6 month Pilot
starting with the first Operating Day with FRRS deployments]
5. ERCOT to receive the first set of offers 1-15-13. First Operating Day with
FRRS deployments is 1-19-13. Continue Pilot for 6 months (7-19-13) unless
stopped early by ERCOT. Extensions of pilot may be considered during the
first 6 months and would need ERCOT BOD approval.
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Other Info
1. Regular updates to be provided to ETWG and PDCWG during the
Pilot Project.
2. It is expected that ERCOT will need to engage a contractor equivalent
to .5 to 1 FTE for the duration of the Pilot Project.
3. The average cost for REGUP over the last 6 months has been about
$9/MW and for REGDN has been about $6/MW. The estimated cost
for 6 months of FRRS procurement from pilot resources is estimated
to be about $3.4 Million.
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Potential benefits of FRRS
1. Promptly arrest frequency decay during unit trips.
2. Reduce the use of traditional regulation.
3. Reduce the quantity of Regulation capacity required to be
procured.
4. Provide better frequency control at a lower overall cost.
September 7, 2012
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Questions?
September 7, 2012
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Appendix
Additional Slides Presented Previously at WMS/ROS/ETWG/PDCWG
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Declining Inertial Frequency Response in ERCOT
http://www.ercot.com/content/gridinfo/etts/keydocs/System_Inertial_Frequency_Response_Estimation
_and_Impact_of_.pdf
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ERCOT Frequency Profile Jan 2011 through Feb-2012
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170
170
160
160
150
150
140
140
130
130
120
120
110
110
100
100
CPS1 Average
ERCOT CPS1
2
r- 1
Ma -12
n
Ja v- 11
Nop- 11
Se -11
l
Ju y-11
Mar- 11
Ma -11
n
Ja v- 10
Nop- 10
Se -10
l
Ju y-10
Mar- 10
Ma -10
n
Ja v- 09
Nop- 09
Se -09
l
Ju y-09
Mar- 09
Ma -09
n
Ja v- 08
Nop- 08
Se -08
l
Ju y-08
Mar- 08
Ma -08
n
Ja v- 07
Nop- 07
Se -07
l
Ju y-07
Mar- 07
Ma -07
n
Ja v- 06
Nop- 06
Se -06
l
Ju y-06
Mar- 06
Ma -06
n
Ja v- 05
Nop- 05
Se -05
l
Ju y-05
Mar- 05
Ma -05
n
Ja v- 04
Nop- 04
Se -04
l
Ju y-04
Mar- 04
Ma -04
n
Ja v- 03
Nop- 03
Se -03
l
Ju y-03
Ma
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September 7, 2012
12 Month Rolling Average
Monthly Average
Frequency Decay Slope
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FRRS-Up and FRRS-Down Deployment Logic
•
•
•
•
•
•
Deadband for FRRS trigger (±0.03 Hz)
Deployment period
Deployment period when frequency degrades further
Recalling
Maximum continuous deployment duration
Apply similar logic for Down-Regulation for high
frequency
• ERCOT may make additional parameter changes during
pilot as needed
• FRRS deployment signal logic will be shared with the
pilot Resources
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FRRS Deployment logic and Parameters
1. During the FRRS pilot, some of the FRRS deployment
parameters listed below are subject to change within the
defined range
2. Initial trigger limit may be changed to ± 15 mHz
3. Initial FRRS MW deployment may be changed
4. Duration of FRRS deployment may be lowered from
current 2 minutes duration for any single band deployment
5. FRRS deployments may be done proportionally over
increments of 0.01 Hz or 0.005 Hz between 59.985 Hz and
59.95 Hz.
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Example: FRRS and PFR
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Example: FRRS Deployment Logic and Expected Impact
Deploy
current
Reg-Down
Recall
Reg-Down
and
Deploy
Reg-Up
September 7, 2012
Deploy
FRRS-Up
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Simulation: Effect of FRRS on sudden large Frequency decay
FRRS-Up Full
Deployment with 1
second delay after
59.91 Hz
September 7, 2012
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September 7, 2012
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Scenario 1: Frequency below 59.97 Hz
Frequency (Hz)
60
59.99
59.97
BAND 1
59.95
BAND 2
59.93
59.91
Up
X%
FRRS Deployment
BAND 3
Idle
Y minutes
Down
0+
<= 2
Time (minutes)
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Scenario 2: Frequency below 59.95 Hz
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Scenario 3: Frequency below 59.91 Hz (on slow decline)
Frequency (Hz)
59.97
FRRS Deployment
60
59.99
Up
59.95
59.91
Idle
Down
0+
September 7, 2012
<=2
Time (minutes)
27
<=4
<=6
TAC
Scenario 4: Frequency below 59.91 Hz (Unit trip)
Frequency (Hz)
60
59.99
59.97
59.95
59.93
Up
X%
FRRS Deployment
59.91
Idle
<=2 min
Down
0+
Time (minutes)
September 7, 2012
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FRRS-Up Recall (Always based on duration or frequency)
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