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Energy storage what weve learned from puerto ricos mtrs (saloman)
- 1. CONFIDENTIAL - Copyright © 2016 Clean Horizon Consulting
Energy storage:
What we’ve learnt from Puerto Rico’s MTRs
11:30- 12:30 October 19
CREF 2016
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- 2. CONFIDENTIAL - Copyright © 2016 Clean Horizon Consulting
What is the value of energy storage in the Caribbean?
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Intermittent renewables
integration
Increase forecast
precision
Decrease ramp rates
PV Yield
Smoothed
generation
Three main applications for energy storage in the islands
Spinning reserve
replacement
Grid investment deferral
Time shift energy with storage
Increase assets utilization
- 3. CONFIDENTIAL - Copyright © 2016 Clean Horizon Consulting
The Minimum Term Requirements in Puerto Rico
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Puerto Rico Electric Power Authority (2012)
The plant (with an installed capacity of Pmax) needs to fulfill two requirements
simultaneously:
1/ Ramp rate control
- Active power variations must remain below the rate of 10% of Pmax
per minute
- Minimum power rating of the battery is 45% of the MWp of the solar farm
for 1 minute
2/ Frequency regulation
Mandatory, symmetric as long as the plant produces between 10% and
100% of its nameplate capacity:
Δf
+12 mHz-12 mHz
5% droop
+0.3 Hz
ΔP
-0.3 Hz
10% of Pmax
- 4. CONFIDENTIAL - Copyright © 2016 Clean Horizon Consulting
Other islands with similar conditions?
Japan – Hokkaido example
In Hokkaido, the regulator authorized the installation of 1.4 GW of
PV (out of c.a. 8 GW of total installed generation).
In 2014, Hokuden (the local utility) added constraints in the grid
code to integrate further PV:
Limit ramp rates to 1% of Pmax/min
Ability to shut down within 15 minutes with a maximum ramp
rate of 12% of Pmax /min
Possibility to curtail 30 days per year
French “non interconnected zones”
A French decree1 authorizes the grid operator to curtail
intermittent generation if its share goes beyond 30% of the active
power generated, and the generators are not compensated
during that time.
Hence, the latest PV + storage tender required the ability to:
Follow a forecast within 5% of Pmax
Control ramp rates within 0.3% of Pmax /min
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1. Decree published April 23rd 2008, NOR DEVE0808815A
