Agenda

Technology and Operational

Results of REpower 6M

Jens Goesswein

Head of Product Management,

Business Unit Offshore

EOW 2009

Stockholm, 2009-09-15

REpower Systems AG 2

Agenda

Technology 6M

Operational Results

Projects & Lessons Learned


Key Data

Design Parameters Design wind speed: 10,5 m/s Type Class IEC 1b & S-

class

GL Offshore

TC I

Design Parameters Design wind speed: 10,5 m/s Type Class IEC 1b & S-

class

GL Offshore

TC I

Rated power: 6.150

kW Rotor diameter: 126 m Masses:

Rotor: ~130

to. Nacelle: ~330

to. Tower (100 m HH onshore): ~433

to.Tower (offshore, 65 m long): ~250

to.

Rated power: 6.150

kW Rotor diameter: 126 m Masses:

Rotor: ~130

to. Nacelle: ~330

to. Tower (100 m HH onshore): ~433

to.Tower (offshore, 65 m long): ~250

to.


Major Changes 6M to 5M

Higher voltage of 6,6 kV (instead of 950 V) in generator

stator Water cooling of generator (air – water – air) New gear box (higher torque) Utilisation of REpower control system REguard Control B Adaptation of transformer to the higher voltage and power Optimization of the platform

Higher voltage of 6,6 kV (instead of 950 V) in generator

stator Water cooling of generator (air – water – air) New gear box (higher torque) Utilisation of REpower control system REguard Control B Adaptation of transformer to the higher voltage and power Optimization of the platform


Mechanical System (identical / similar to 5M)

2-step planetary gear box

with one spur wheel

Double bearing of rotor shaftElectrical single blade pitch

Welded main- and

generator frame

Yaw system with 8 drives

and 8 active breaks


Electrical System

Dry type transformer (30 kV or 33 kV) Air to air cooling

IGBT Converter (modular) Water to air cooling

Synchronizer with filter for

harmonics

Electrical cabinets (UPS,

Converter, Top Box)

DFIG generator 6 pole, 660 V / 6.6 kV) Air / water / air cooling


Offshore Features (examples)

Onboard crane for O&M Helicopter hoist on top of

nacelle Dehumidification of tower

and nacelle Indirect ventilation through

heat exchangers Automatic fire protection

system CMS & Oil Particle

Counter Enhanced corrosion

protection


Power Curve and Energy Yield Comparison

Power Curve Comparison 5M / 6M

0

500

1000

1500

2000

2500

3000

3500

4000

4500

5000

5500

6000

6500

0 5 10 15 20 25 30

Wind Speed (m/s)

el. P

ower

(kW

)

Power Curve 5M Power Curve 6M (both with LM61.5P2 Evolution)

Mean wind speed

annual Energy Yield

5MGWh

annual Energy Yield

6M with LM61.5GWh

Difference%

7 m/s 13,99 14,51 3,7

8 m/s 17,77 18,87 6,2

9 m/s 21,16 22,93 8,4

10 m/s 24,09 26,53 10,1


Technology 6M

Operational Results


Agenda


Track Record 5M (as of 30 Aug. 2009)

17 turbines up and running 9 onshore (Germany) 8 offshore (UK and Belgium)

Total operating hours of the fleet: 171,020 (19.5

years) Average turbine life: ~ 14 months Average tech. availability in 2009: > 95-98%


Prototype Project

3 x 6M: wind farm Ellhoeft / Westre Location: Ellhoeft, Schleswig-Holstein Customer: 220 private investors

from Germany and Denmark(Buergerwindpark / Cooperative)

Installation: Q1 / 2009 Status: all 3 WEC in full operation


Operational Experience (3 x 6M Prototypes)

Operational data Energy yield Tech.

availability

April 2009 < 1 GWh

commissioning

May 2009 1.54 GWh

commissioning

June 2009 1.98 GWh 80%

July 2009 1.40 GWh 86%

August 2009 1.71 GWh 92%

September 01.-13. 2009 98%


Validation & Certification

Measurements Power Curve Sound power level Load measurements Grid (with FRT & further tests)Certification Type approval German DIBT Type Certificate IEC Certification GL Offshore


Market Introduction 6M

Prototype: Q1 -

2009

Initial batch: 2010 /

2011

Offshore – Projects: from

2012


Technology 6M

Operational Results


Agenda


Projects 5M and 6M

Number Type

Rated Power (MW)

Hub Height (m)

Site Country On- / Offshore Installation

1 5M 5 120 Brunsbüttel Germany Onshore Q4-2004

1 5M 5 89 Beatrice UK Offshore Q3-2006

2 5M 10 117 Cuxhaven Germany Onshore Q4-2006

1 5M 5 89 Beatrice UK Offshore Q3-2007

3 5M 15 117 Büttel Germany Onshore Q3-2007

2 5M 10 117 Büttel Germany Onshore Q4-2007

1 5M 5 120 Bremerhaven Germany Onshore Q2-2008

6 5M 30 94,5 Thornton Bank Belgium Offshore Q3-2008

3 6M 18 100 Ellhöft / Westre Germany Onshore Q1-2009

Sum 20 103


Lessons Learned

1 2 3Contractsigning

Installationof infrastructure

Installationof WTG

year:

… please don‘t forget year 0Take your time for proper planning, interface management, tower and foundation design and the reservation of suitable installation equipment.

Compromise wins the trickOffshore is a risky business – there are always changes, delays and potential extra costs. No contract can allow for all of them – so you need compromises and project managers with the mandate to deal with them.


Nordergruende

Developer: Energiekontor AG

Location: 15 km north-eastern off Wangerooge

Number of turbines: 18 x REpower 5M

Water depth: 4-14 m

alpha ventus (2009):

Developer: DOTI (Vattenfall, E.ON, EWE)

Location: 45 km off the shore of Borkum

No. of turbines: 6 x REpower 5M

6 x Multibrid M5000

Water depth: 26-30 m

Status: installation in progress

Source: www.alpha-ventus.de / www.energiekontor.de

Ongoing & Planned Projects


Ormonde

Combined Wind & Gas Power Plant

No. WTG: 30 x 5MCapacity: 150 MWDeveloper: Vattenfall

(Eclipse)Water depth: 20 mDistance to shore: 10 km

Project ScheduleContract signing: 2009Foundations & Grid: 2010WTG: 2011

Commissioning: 2011

Source: www.vattenfall.com / http://seapower-generation.co.uk


Many thanks for your interest!

Documents

Agenda