BENEFITS OF HYBRID ENERGY STORAGE SYSTEMS COMBINING LITHIUM-ION AND - - PowerPoint PPT Presentation

BENEFITS OF HYBRID ENERGY STORAGE SYSTEMS

COMBINING LITHIUM-ION AND VRLA BATTERIES

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• What is an energy storage system?
• Application: Frequency Response
• Case Study at HOPPECKE Headquarter
• Economic observations

BENEFITS OF HYBRID ENERGY STORAGE SYSTEMS

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• What is an energy storage system?
• Application: Frequency Response
• Case Study at HOPPECKE Headquarter
• Economic observations

BENEFITS OF HYBRID ENERGY STORAGE SYSTEMS

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What is an energy storage system?

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• System which either electrical, thermal or mechanical

storing energy in the appropriate form of use

• Electrical energy storage system store the electrical

energy by transforming them into e.g. electro-chemical

• r electro-mechanical energy

The applications are most-likely:

• Demand response
• Frequency response
• Load management
• Energy time shift
• Peak Shaving
• E-Mobility Infrastructure

The applications are most-likely:

• What is an energy storage system?
• Application: Frequency Response
• Case Study at HOPPECKE Headquarter
• Economic observations

BENEFITS OF HYBRID ENERGY STORAGE SYSTEMS

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Application: Frequency response

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Application: Frequency response

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time frequency / Hz

• Completely stochastic trend of the frequency over time (time series 06/2014)

Application: Frequency response

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• Energy Storage Systems are counteracting the frequency trend
• Acting like a P-Controller (no desired setpoint and measurement of error values)

49,8 49,85 49,9 49,95 50 50,05 50,1 50,15 50,2

• 120% -100% -80%
• 60%
• 40%
• 20%

0% 20% 40% 60% 80% 100% 120% Frequency in Hz Power in % Envelope (Std.) Envelope (incl. Exceeding)

Application: Frequency response

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• Requirements to be a tradeable asset in the frequency response market
• Within 1-9s to 100% power, in Germany within 30s due to the rotation mass from the past
• An automatic mode acting depending on the frequency and remote control for the Trader
• Min. required capacity: 1MW / 1MWh and 1.25MVA (Germany)
• A prequalification showing to be able to discharge at least 4 times 15 mins 100%*PN

Application: Frequency response

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0% 5% 10% 15% 20% 25% 95% 90% 85% 80% 75% 70% 65% 60% 55% 50% 45% 40% 35% 30% 25% 20% 15% 10% 5% 0%

• 5%
• 10%
• 15%
• 20%
• 25%
• 30%
• 35%
• 40%
• 45%
• 50%
• 55%
• 60%
• 65%
• 70%
• 75%
• 80%
• 85%
• 90%
• 95%
• 100%

Quantity Share of nominal power

Quantity of required frequency response

90% of a year <20% und >-20%

• f installed power

Backup cyclic Backup

Which technologies are suitable?

Application: Frequency response

TECHNOLOGY BENCHMARKING

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Lead Acid + Ni-Cd

2 4 6 8

Lead Acid+ Flywheel

2 4 6 8

Lead Acid+ NiMH

2 4 6 8

Lead Acid+ Li-Ion

2 4 6 8

Lead Acid+ NaS

Best Total Performance

1 2 3 4 5 6 7

Proven Concept Energy Density Cycle Lifetime High C-Rates Safety Wh-Efficiency Value-for-Money Pb Lithium NIMH Ni-Cd Flywheel

• What is an energy storage system?
• Application: Frequency Response
• Case Study at HOPPECKE Headquarter
• Economic observations

BENEFITS OF HYBRID ENERGY STORAGE SYSTEMS

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Case Study at HOPPECKE Headquarter

Batteries

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Target voltage: 700 – 1100V Power / Channell: 500 kW Usable Energy: 500kWh

power.com SB 2V 600Ah 32er POWER.RACK Utilization 55% Efficiency 90% 832 Cells 416S2P Voltage: 707,2 – 998,4 V 998,4 kWh nominal Lithium NMC 3,97 kWh Utilization 80 % Efficiency 95% 160 Batterytrays (á 16 Cells) 16S10P Voltage: 793,6 – 1049,6 V 635 kWh nominal

No Ageing or design marge since the storage will be utilized better by improvements in the SCADA system

Battery Type Requirement Design Criteria Sizing

Case Study at HOPPECKE Headquarter

TP3: Battery Concept

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• Three Battery strings each of 500kW and approx. 500 kWh usable energy content

 two strings of valve-regulated Lead Acid Batteries

Technical Data per String (Excerpt) Energy (nom.) kWh 1,005 Voltage Range V 686.4 – 998.4 Weight kg 29,952 excl. Racks Qty of cells 832 Technical Data per String (Excerpt) Energy (nom.) kWh 635 Voltage Range V 793.6 – 1,049.6 Weight kg 7,680 excl. Racks Qty of cells 2560

 one string of Lithum-Ion Batteries (special fireprotection racks)

Case Study at HOPPECKE Headquarter

TP3: Battery Concept

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• Liquid cooled inverter (IGBT) of the latest technology
• water.- and dust-tight housing

(IP65 – no additional container necessary)

• Three independent DC Outputs each of 500 kW
• DC voltage up to 1100 V

Case Study at HOPPECKE Headquarter

Impressions

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Case Study at HOPPECKE Headquarter

Impressions

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Case Study at HOPPECKE Headquarter

Impressions

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Case Study at HOPPECKE Headquarter

Impressions

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• What is an energy storage system?
• Application: Frequency Response
• Case Study at HOPPECKE Headquarter
• Economic observations

BENEFITS OF HYBRID ENERGY STORAGE SYSTEMS

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ECOMOMIC observations

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• 300.000 €
• 200.000 €
• 100.000 €
• €

100.000 € 200.000 € 300.000 € 400.000 €

Szenario 1 Szenario 2 Szenario 3 Net Present Value[€]

Net Present Value

VRLA Lithium

• 1.200.000 €
• 1.000.000 €
• 800.000 €
• 600.000 €
• 400.000 €
• 200.000 €
• €

200.000 € 400.000 € 600.000 €

1 2 3 4 5 6 7 8 9 10 Cost/Revenue[€] Jahre

ROI

Revenue Szenario 3 CAPEX + OPEX ROI Lithium - Revenue +5%/a ROI VRLA - Revenue +5%/a ROI Hybrid PB/FW - Revenue +5%/a

Szenario 1: Revenue development 5%/a Szenario 2: Revenue development -5%/a Szenario 3: Revenue equality IRR: 5% Revenue FR: 2.800 €/MW

Assumptions

• Business Case FR can be profitable if
• ROI between 7 and 9 years is accepted
• Hybrid-Storages are more economic

than only VRLA or only Lithium-Storages

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Thank you very much. Feel free to contact us here !

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