WindMill ABB

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Dry Type Vacuum Cast Transformers in Wind Mills

ABB Power DistributionPage 2 ABB

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1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004

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Wind energy is a fast growing source of energy.Wind energy is a fast growing source of energy.

Spain is one of the fastest growing marketSpain is one of the fastest growing market

installed

MW per year

accumulatedinstalled MW(end of year)


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TotalInstallation End

1999, MW

Prognosis until

2004, MW

GERMANY 4.482 12.148

SPAIN 1.812 9.912

DENMARK 1.738 3.338THE NETHERLANDS 433 1.208

UK 362 1.312

ITALY 277 1.477

SWEDEN 220 1.145

GREECE 158 808

IRLAND 74 329

PORTUGAL 61 261

FINLAND 39 244

AUSTRIA 34 214

FRANCE 25 725

NORWAY 13 963TURKEY 9 579

SWITZERLAND 3 123

OTHER EUROPE 39 219


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MARKET SHARE FOR WINDMILL

TECHNOLOGIES

Vestas (DK)

16%

NEG Micon (DK)

20%

Gamesa (SP)

12%Enercon (DE)

12%

Enron (USA)

9%

Bonus (DK)

8%

Sonstige

7%

DeWind (DE)

1%

Ecotecnia (SP)2%

Made (SP)

5%

Nordex (DE)

8%


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ABB


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Developer

Contractor

Financier

Generator

Transformer

Switchgear


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Transformer and the wind turbines: possible arrangements

3. One dry or oil filled transformer located outside the tower

1. One dry transformer located in the tower

2. One dry transformer located in the nacelle


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DRY TRANSFORMER IN THE TOWER: THE ECOLOGICAL CONCEPT


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Transformer in the tower: the basic concepts

1. Generation voltage is around 660V, conductors must beshort and broad between the generator and the transformerto reduce the losses

2. The electrical protection system in both oil and dry type

transformers are similar

3. Transformer value is around 2% of the total installation cost

in a wind tower


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Typical design of a WindTurbine with dry transformer

1. BLADES

2. PITCH SYSTEM3. GEARBOX

4. WIND-GAUGE5. CONTROL UNIT6. HYDRAULIC POWER UNIT

7. NACELLE FRAME

8. INDUCTION GENERATOR

9. DRY TRANSFORMER10. CONTROL PANEL11. SWITCH GEAR


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DRY

TRANSFORMER

ECOLOGY

AND

EFFICIENCY


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Advantages (1): the ecological concept

1. Ecological: no risk of oil spillage

2. No visual impact of transformer located outside

3. Eliminates fire hazard

4. Safety for people and property


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Advantages (2): an optimum technical solution

In case of high wind, higher capacity to support overloads thenan oil filled transformer

Dry transformer: higher thermal time constant

More conductor in the transformer

higher temperature rise (100 instead of 65K)


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Dry Transformers can work with all type of generators

Asynchronous generators with one set of poles

Asynchronous generators with two set of poles

Double feed asynchronous generator

Multiple pole synchronous generator for the widest speedrange


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1. Great resistance to short circuit efforts

2. Great performance towards seismic phenomenon

3. Suited for damp and contaminated areas

4. E2 C2 F1: able to operate down to -25C

5. Less than 10pc partial discharges


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Advantages (3): a more economical solution

Move the transformer closer to the generator to reduce length

of cable and hence level of losses.

Savings pay for the total cost of the transformer


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2. Saves in fire detection systems

1. Saves civil works: no need for outside platform

Advantages (3): a more economical solution

4. Avoid any investment to install the transformer, neitherexcavation nor pit to control spillage

5. Eliminates maintenance

3. Insurance cost is reduced due to the lower risks associated

With a dry transformer the total investment cost and the totalownership costs are reduced


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Conclusions

1. The most cost efficient solution

2. No maintenance and no risksare the best investment

3. Your installation and your staffwill be safer

4. Dry Transformers will reinforce your ecological energy image


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ABB

The deepest experience

Close to 2000 vacuum cast coil transformer installed inwind mills


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Year Firm Project name Country Units

Installed

power

(MW)

2000 NEG MICON Various Denmark 9 11

2000 VESTAS Various Denmark 17 132000 SIEMSA Port La Nouvelle France 10 6

2000 NEG MICON Italy Italy 2 2

2000 NEG MICON Klimpfjall Sweden 4 5

1998 CEASA Borja Spain 25 18

1998 EHN Echage Spain 33 23

1998 MADE Medina del Campo Spain 19 13

1998 SIEMSA Various Spain 253 177

1999 CEASA Various Spain 126 881999 EHN Guerinda Spain 31 22

1999 INEUROPA EOLICA Xistral Spain 14 10

1999 MADE Various Spain 109 76

1999 MONCOBRA Borja Spain 24 17


2000 EHN Various Spain 124 86

2000 ELECNOR Cabanillas Spain 86 702000 GAMESA Pical Spain 36 27

2000 MADE Tineo, Asturias Spain 8 5


2000 ZURCAL Valencia Spain 21 17

2001 NEG MICON Various Spain 79 70

REFERENCE LIST: WIND FARMS


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ABBContract and agreements with specialised engineering firms


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ABB90% of the Spanish wind mills are using our transformers


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ABB Power DistributionPage 23

ABB

ABB special designs developed for the wind millapplications

transformers with enclosure

small dimension transformers able to enter through thedoor

Reduced losses transformers

Transformers with tertiary for auxiliary services


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ABB

ABBABBABBABB Special designs

Reduced dimensions

Able to enter through

the door


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ABB


Transformer with

reduced dimensions

enclosure


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ABB



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ABB

ABBMost advanced production technologies to guarantee the

best product quality

Among the largest production capacity to guarantee on timedeliveries

Present all over the world to guarantee the best after salesservice

The deepest experience in the application to guarantee the

best technical solutions

The most demanding quality control system to guarantee thetotal reliability of your product


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ABB

W

THE WIND BLEW YESTERDAY ...


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ABB Power DistributionPage 30ABB

W

... AND WILL BLOW

TOMORROW

WindMill ABB

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