power installation of wind turbines

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Power Installation of Wind Turbines

Jens Peter Molly, DEWI GmbH

11th DEWEK 2012

Bremen, Germany

07. November 2012

SITE ASSESSMENT . WIND TURBINE ASSESSMENT . GRID INTEGRATION . DUE DILIGENCE . KNOWLEDGE . CONSULTANCY

www.dewi.de / www.ul.com




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G df th f t ll t ll dGrandfather of stall controlled wind turbines:

Gedser wind turbine

Denmark

1957, 24 m rotor diameter, 200 kW, 442 W/m²



G df th f it h t ll d i d t biGrandfather of pitch controlled wind turbines:

Hütter W‐34 wind turbine

Germany

1957, 34 m rotor diameter, 100 kW, 110 W/m²

www.dewi.de / www.ul.com Page 3

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Specific Power Installation

m²

fic

Po

wer

Inst

alla

tio

n,

W/

Strong winds

Normal winds

Weak winds

Specific lay-out


Power Installation, kW

Sp

ecif Old wind turbines

Old Offshore lay-out

New Offshore lay-out


Constant rotor diameter, different power installations:

Which turbine lay‐out produces the energy at lowest cost????

Ø = const.


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Energy Production with Different Installed Capacities

= const



Normierte Energieerzeugungskosten

t

Energy Generating Cost

c E

ner

gy

Gen

erat

ion

Co

st


Sp

ecif

ic

Specific Power Installation, W/m²

Page 7

5


Power Duration Curves

Energia gerada = área em baixo da curvaEnergy produced = Area below the curves

Po

tên

cia,

kW

Po

wer

, kW


Duração anualDauer pro JahrDuration per Year

Page 8


Rayleigh distribution

V = Wind speed at hub height

Pinst. = Capacity installed per m² rotor disc area

a

Relation of Energy Yield and Capacity Factor

rzeu

gung

, MW

h/m

²/a

erg

y Y

ield

, MW

h/m

²/a


Ene

rgie

er

KapazitätsfaktorCapacity Factor

En

Page 9

6


Definition of Storage Capacity

ut

nd

ard

ized

Po

wer

Ou

tpu

Average power for 350 W/m²

Average power for 200 W/m²


Duration per Year

Sta

Page 10


Relative Speicherkapazitäten und Energieerzeugungskosten

Storage and Energy Yield Cost

+7%

-16% 100 days

119 days

133 days +12%


y

Page 11

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Future tasks of the German national grid system:

Provide sufficient grid capacity for energy t d

German Extra High Voltage Grid

trade

Allow integration of geographically concentrated wind energy production

Smooth the energy fluctuations caused by renewable energies (storages, control of energy consumption, wind turbine lay-out, etc.)

Electric energy supply with acceptable


energy cost for the consumer

Question:

Who is responsible for the optimization of the electric energy system, composed of electricity production, transportation and distribution?S. Kohler: Auswirkungen des Windenergieausbaus auf das deutsche

Übertragungsnetz.

„7. Schwetzinger Energie-Dialog“ Schwetzingen, 12.03.2008

Page 12

power installation of wind turbines

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