Casi studio e applicazioni dell’energy storage in mercati avanzati

Davide Alfonso Project Manager – E.ON Energy Storage Solutions

Agenda

Il mercato dello storage: drivers e tecnologie 1

3 Casi studio e applicazioni nel Regno Unito

Casi studio e applicazioni in Germania 2

Agenda

Il mercato dello storage: drivers e tecnologie 1

3 Casi studio e applicazioni nel Regno Unito

Casi studio e applicazioni in Germania 2

Dramatic changes are happening in the energy system

* Diagram Source: EPRI

Centralised Decentralised

Emergence of commercial battery storage

Technical

challenges

Economic

challenges

Regulatory

challenges

Performance

Life length

Efficiency

High costs

Lack of clear definition

Legal framework

designed for existing

electricity system

Driven by a combination of technical, economic and regulatory challenges.

Advanced technologies

Lower costs New business models

Regulatory rulings

Policy action

Among available technologies, lithium-ion batteries stand

out as a mature and most available solution

Energy

storage

Batteries

Electro-

mechanical

Thermal

Pumped

hydro

Lithium-ion

Other Solid

Flow batteries

Heat Thermal

Flywheel

Solar Thermal

Ice Thermal

Compressed air

Technology

maturity

Storage

duration

Energy

density Cost

Best in class Worst in class

Relatively low price

High modularity/

scalability

Technological

simplicity

High energy

efficiency

High energy density

LI-ION batteries : Most

promising technology

Il mercato dello storage: drivers e tecnologie 1

3 Casi studio e applicazioni nel Regno Unito

Casi studio e applicazioni in Germania 2

The emergence of residential battery storage to maximise

PV energy self-consumption

Expanding gap between PV-LCOE and

electricity prices leading to Battery-parity

Rooftop solar makes up the largest part of

Germany’s 40GW installed solar capacity

Key drivers

1

2

Increased Self Consumption

with Battery+PV

2014 2016 2018 2020 2022 2024 2026

EU

R

Retail price

Feed in tariff

Increasing spread between retail prices & FiT

PV Generation Power demand

Improving Battery Economics

Increased self consumption

PV-battery systems could reach an annual

installation volume of around 50,000 units

by 2020

Self consumption,

w/o battery

Self consumption,

with battery

“E.ON Aura” : 4 blocks for economical residential power

self-sufficiency Usable storage capacity : 4.4 kWh ,

expandable to 11 kWh

Overall efficiency ( round-trip ) : 93 %

E.ON Aura Solar E.ON Aura Storage E.ON Aura Manager E.ON Aura Strom

E.ON Aura Solar

Generates electricity from PV

E.ON Aura 500

Stores electricity produced from PV

AC-Sensor 50 Storage metering

E.ON Aura App informs and visualises

E.ON Aura Controller measures and controls

energy flows

E.ON Aura Strom

provides green electricity when the sun is shining too

little

Case study: Pellworm

Island with 1,000 inhabitants / 600 homes

Renewable generation: 22 GWh pa.

Consumption only 7 GWh pa.

But sometimes insufficient generation to meet

demand

Multiple battery technologies utilised

Needed to meet different system requirements

All assets integrated into centralised island

energy management system

Operating as a single ‘hybrid’ battery system

Lithium ion

battery

1 MW, 560 kWh

Redox-flow

battery

200 kW, 1600 kWh

Electrical

storage heaters

Total: 195 kW, 780 kWh

Residential

batteries

Total: 80 kW, 80 kWh

Key Parameters

Sale of renewable energy on spot & reserve markets

Provision of local grid services (avoid curtailment,

etc)

Maximising self-consumption of local renewables

Exposure to different upstream business models

Il mercato dello storage: drivers e tecnologie 1

3 Casi studio e applicazioni nel Regno Unito

Casi studio e applicazioni in Germania 2

The UK electricity grid is becoming increasingly instable

12

Source: National Grid

The Enhanced Frequency Response (EFR)

Technical requirements:

• Response within 1s from occurrence of frequency deviation

outside of 15mHz deadband

• Bidirectional response proportional to frequency deviation

• Up to 15 min response in either direction

• Technology agnostic

Tender facts and figures

• 243 tender options, at 64 different sites, by 37 companies.

• Only 8 bids accepted, totalling 201 MW

• Clearing price of £11.97/MW-h

• All 8 contracts awarded to batteries

The E.ON Blackburn Meadows project

Project overview

• 10MW/5MWh Li-Ion Battery system

• Co-located with existing 30 MWel biomass

CHP plant in Sheffield

• System footprint: 4x40ft ISO containers,

approximately 30mx30m

• Construction started in Jan 2017, COD

expected in Sept 2017

Current revenue streams

• 4 year Enhanced Frequency Response

(EFR) contract worth £11.09/MW-h

• 15 year Capacity Market (CM) contract

worth £22.50/kW-year

E.ON is building one of the first commercial battery projects in the UK

Grazie per l'attenzione