lithium ion battery energy storage for remote microgrids€¦ · battery energy storage system 6...

Lithium Ion Battery Energy Storage for Remote Microgrids

David Mall

Renewables in Remote Microgrids 2015

Yellowknife, Northwest Territories, Canada

September 16, 2015

Renewables in Remote Microgrids 2015; Saft Lithium Ion Battery Energy Storage for Remote Microgrids 2

Saft. A world leader for advanced and innovative applications

Sa# is the world’s leading designer, developer and manufacturer of advanced technology ba;eries for industrial and defense applica<ons. The Group is implemen<ng its strategy for high technology lithium-‐ion ba;eries for clean vehicles and energy storage systems.

With over 4,000 employees worldwide, Sa# is present in 18 countries

Mature, reliable technology


n  #1 worldwide in Li-ion satellite batteries

n  Mercedes S400 hybrid n  First production vehicle with

Li-ion

n  Ferrari F1 KERS (and 4 other teams)

n  F-35 Joint Strike Fighter

n  Airbus A350 XWB

Intensium Max Containerized Systems


n  Intensium Max for ancillary services and renewables smoothing

n  20-foot ISO containers

n  Flexible power-to-energy ratio

n  Integrated Power Conversion System

n  Allows for maximum flexibility n  Transportation

n  Siting

IM20E IM+20E IM20M IM+20M IM20P

Power (kW) 900 500 1100 2000 1600

Energy (kWh) 620 1000 580 950 420

NTPC Colville Lake Microgrid


n  30-50 kW base load; 150 kW peak

n  Diesel fuel delivery only by ice road n  Cost of generation ~$2.60 / kWh!

n  New power station n  2 x 100 kW diesels + 150 kW diesel

n  50 kW PV installed in 2014, expanded in 2015

n  Without storage a diesel must run 24 / 7 n  Covering sudden PV ramps

n  PV curtailment likely in order to run diesel efficiently

n  No possibility to cover entire load with PV

Battery Energy Storage System


n  Energy storage added to maximize fuel savings

n  Saft provided an Intensium Max 20M Battery Energy Storage System containing 200 kW / 231 kWh with internal PCS

n  BESS allows network operation without diesels n  Voltage-source 4-quadrant PCS sets frequency and voltage n  Allows PV array to be sized larger than connected loads

Optimizing PV Size

Hybrid Energy Innovations 2015; Remote Microgrid Case Study - Colville Lake, NT 7

n  Used NTPC-supplied load and Enphase-supplied PV data

n  System modeling used to analyze PV size vs. fuel savings

n  Diesel consumption begins to level out at PV output factor >2.5

n  Recommended PV expansion to ~130 kW n  Based on just avoiding PV curtailment on average production day

Importance of modeling

n  Modeling allows fuel savings to be quantified

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65% fuel saved

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37% fuel saved

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5% fuel saved


High PV Generation Average PV Generation No PV generation

Managing PV curtailment


n  Use of Enphase microinverters with no central controller n  Normal curtailment is via frequency droop

n  Curtailment needed when battery reaches full state of charge n  Frequency droop control not possible without

rotating equipment on the network n  Curtailment managed by switching off array

sections

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Scalability and Flexibility – Colville Lake BESS Expansion


n  System is designed for expandability n  Battery container designed to accommodate doubling energy to 462 kWh n  Further reduce PV curtailment and fuel consumption n  Deployment of wind turbines also a possibility

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Battery configuration 4 ESSUs 8 ESSUs

Load kWh 2530 Diesel-‐only fuel consumption (gal) 217.6 PV total (kWh) 2008 PV curtailment (kWh) 359 140 PV net (kWh) 1649 1868 PV % of load 65% 74% Diesel fuel consumption (gal) 60.0 53.8

4 ESSU’s

8 ESSU’s

Scalability & Flexibility: Kotzebue Electric Association Microgrid


n  KEA operates a remote microgrid, disconnected from main grid, above the arctic circle in Alaska’s Northwest Arctic Borough

n  Serving approximately 840 members; generating over 18 million kWh / year

n  Average load 2.5MW, 3.7MW peak

n  Power provided by Wind-diesel hybrid power system n  5 engine/generator sets with an available output of 9.8MW

n  19 wind turbines with 2.94MW generating capacity; about 4 million kWh / year

n  Objectives: n  Maximize Use of Wind / Minimize curtailments

n  Maximize Diesel Efficiency / minimize diesel consumption

n  Minimize Diesel starts

n  Saft provided a 1225kW / 950 kWh Battery Energy Storage System n  Intensium Max+ 20M container

n  External 1.225MVA ABB Power Conversion System

Thanks for listening!

n  Success in Colville Lake will pave the way to similar systems to be installed in other remote communities

n  [email protected]


lithium ion battery energy storage for remote microgrids€¦ · battery energy storage system 6...

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