SEITE 1 03.07.2013

Future Distribution Grids

Enschede, October, 18th 2013

Dr. Stefan Küppers

Managing Director Technics, Westnetz GmbH

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Westnetz is the leading Distribution System

Operator in Germany

18.10.2013

Some facts:

Turnover

5 B€

Staff 5,300

Distribution area 50,000 km²

Grid length Electricity 195,000 km

Grid length Gas 26,000 km

Connections Electricity 4,500,000

Connections Gas 600,000

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1 Challenges of a Distribution Grid Operator

2 Facing the Future with New Technologies

Slide of content

03.07.2013

3 Innovation Projects of Westnetz

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1 Challenges of a Distribution Grid Operator

2 Facing the Future with New Technologies

Slide of content

03.07.2013

3 Innovation Projects of Westnetz

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Ambitious, achievable German targets concerning

renewable generation and energy efficiency

nuclear

lignite

coal

gas

others

renewable

18 %

25 %

19 %

14 %

4 %

20 %

Generation mix 2011

(energy)

conventional

renewable

20 %

80 %

Generation mix 2050

German policy target

(energy)

Source: AGEB

Basic points of the German energy transition

> Reduction of greenhouse-gas

emissions by 40% in 2020 and by 80-

95% in 2050 compared to 1990

> 80% renewable generation in 2050;

35% in 2020

> Reduction of primary energy

consumption by 20% until 2020 and by

50% until 2050 compared to 2008

> Reduction of emissions caused by

traffic until 2020 by 10% and until 2050

by 40%. 6 Million electrical vehicles in

2030.

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Incentives for conscious energy usage and generation speed

up the energy transition – supported by new technologies

Energy consumption in Germany

Source: dena, Energiedaten BMWi

Household

30%

Traffic

28%

Industry

26%

Trade

16%

Heat

75%

Hot water

12%

Others

13%

Energy consumption in private households

> Almost 30 % of the overall energy consumption is

caused by households

> Building restoration enables an energy reduction of

up to 80 %

– Building insulation

– Efficient heat systems, e.g. heat pumps

Conscious energy usage

> Price incentives to lower consumption

> Technological solutions like Smart Meters and

Home Energy Management Systems may support

Consumers turn into producers (prosumers)

> Incentives for energy self-supply and energy feed

back, e.g. photovoltaic an micro-cogeneration

Energy consumption in private

households

Source: AGEB

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Huge power plants will be increasingly completed

and replaced by decentralized renewable

generation units

The “Energy Turnover” takes place in the distribution grid!

EHV

HV

MV

LV

“Energy Turnover”

26.04.2013

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The Distribution Grid in Germany

> 98% of about 1.7 Mio. km

power lines...

> 99,9% of about 45 Mio.

Metering points ...

> 98% of all renewable energy

generation untis ...

... are part/connected to the

distribution grid*

* VDN-Report, Energiehorizonte 2020 – Stromversorgung der Zukunft

EHV

HV

MV

LV

Distribution Grid

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Customer-related power flow is overlaid by

supply-related renewable generation

Mo Tu We Th Fr Sa Su

Po

we

r s

up

ply

Mo Tu We Th Fr Sa Su

Po

we

r s

up

ply

P

ow

er

fee

d b

ac

k

A fluctuating power flow as the challenge for distribution grids!

“Energy Transition”

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10% of renewable generation in Germany are

connected to the Westnetz distribution grid

12% of Germanys wind-energy and 8% of Germanys PV-energy

are connected to the distribution grid of Westnetz.

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GW GW

Westnetz grid Germany

1 GW ≙

PV

Wind

Other renewables

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Niedersachsen Nordrhein-Westfahlen

Rheinland-Pfalz

Hessen0

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Niedersachsen Nordrhein-Westfahlen

Rheinland-Pfalz

Hessen

Further development potential of renewable

energies in the area of Westnetz

Installed PV capacity Installed wind capacity

20

03

tod

ay

20

23

p

ote

ntial

25 39 20 26

GW GW

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ay 2

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1 Challenges of a Distribution Grid Operator

2 Facing the Future with New Technologies

Slide of content

03.07.2013

3 Innovation Projects of Westnetz

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Consumption

Demand-Side-Management

E-Mobility

Energy saving arrangements

The energy turnover affects all sectors of the

energy supply system Generation

Virtual power plants

Extension of renewable energies

Flexible controllable power plants

Storage

Energy and power storages

System stability

Fast, flexible control

Grid

Operation of ICT*

Grid extension

Observability and control

Market

Local market areas

Time variable tariffs

Cross border trading

Cooperation of all market participants necessary

> The future energy supply system integrates demand and feed in characteristics of all

market participants

> The future energy supply system must be economical efficient, enduring and reliable

Energy

Transition

*ICT = Information and Communication Technologies

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Developing distribution grids towards „area

generation units“

TSO EHV-grid

DSO HV/MV/LV-grid

in the past

centralized

energy

flexibility &

system security

TSO EHV-grid

DSO HV/MV/LV-grid

area generation units in the future

also decentralized

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New technologies to improve the integration of

renewable energies into the distribution grid

Improving the transport

of effective power Improving the voltage stability

> Demand-orientated control or shut-

down of renewable energies

> Cos()-control of renewable

generation units

> Integration of decentralized storages > Demand-orientated control or shut-

down of renewable energies

> Demand Side Management > Controllable transformers

> Superconductive power lines > Power electronically voltage

controller

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1 Challenges of a Distribution Grid Operator

2 Facing the Future with New Technologies

Slide of content

03.07.2013

3 Innovation Projects of Westnetz

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Innovation projects of Westnetz

Optimizing maintenance

> Innovative procedures

Developing innovative grid systems

> Smart Grids

> Storage technologies

Optimizing existing capacities

> Voltage control

Optimizing asset usage

> Innovative assets

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Smart Country –

Smart Grid Solutions passed field test in rural region

Optimizing existing capacities

Fermenter, Storage, CHPU

Voltage Controller – 20 kV

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Voltage controllers to balance fluctuations

…

…

HV/MV-

Trans-

former

MV-controller

sub-

station 1

sub-

station 2

Schema voltage (LV) at substation 1 – „infront the controller“

voltage (LV) at substation 2 – „behind the controller“

Voltage fluctuations mainly

coming from PV-panels

Smart Country –

Smart Grid Solutions passed field test in rural region

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Developing innovative grid systems

Pilot project in

Kisselbach und Wincheringen

Smart Operator –

decentralized intelligence in the low-voltage grid

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Converting electricity into hydrogen and feed

into the natural gas grid

> Pilotproject in Ibbenbüren:

– Degree of efficiency: 70 %

– Production of hydrogen: 20 Nm³/h

– Feed in pressure: 12 bar

– Initial operation: Sept. 2013

– Daruation of project: 2.5 years

> Examination focus:

Effects of alternating stress; stability

of the system

18.10.2013

capacitor separator

PEM-stack heat

exchanging

device

rectifier

reverse osmosis

Power-to-Gas –

pilot project with a new storage technology

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Conclusions

Elementary changes of the energy supply system

> Past: Huge generation facilities close to customers with high operation hours

> Future: Smaller decentralized generation fed into various grid levels

Challenges for generation, grid and consumption

> Increasing amount of decentralized and partly volatile generation

> Flexible power plants and storages will simplify the system management

> Changing supply tasks result in increasing complexity of distribution grids

Possible Solutions

> Integration of load and generation within future energy networks

> Smart Grids serving as a platform for innovative solutions within the energy sector

> Westnetz is an active player in “Energy Turnvover”

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Thank you very much

for your attention!

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Westnetz as a designer of the future

distribution grid

18.10.2013

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18.10.2013