Energy storage what weve learned from puerto ricos mtrs (saloman)

CONFIDENTIAL - Copyright © 2016 Clean Horizon Consulting

Energy storage:What we’ve learnt from Puerto Rico’s MTRs

11:30- 12:30 October 19CREF 2016

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What is the value of energy storage in the Caribbean?

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Intermittent renewables integrationIncrease forecast

precisionDecrease ramp rates

PV Yield

Smoothed generation

Three main applications for energy storage in the islands

Spinning reserve replacement

Grid investment deferralTime shift energy with storage

Increase assets utilization


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 Pmaxper minute - Minimum power rating of the battery is 45% of the MWp of the

solar farm for 1 minute

2/ Frequency regulationMandatory, 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


Other islands with similar conditions?

Japan – Hokkaido exampleIn 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 4

1. Decree published April 23rd 2008, NOR DEVE0808815A

Environment

Energy storage what weve learned from puerto ricos mtrs (saloman)