Vestas - newest technology in wind generating power Wind and Hydroelectric Plant Investments in Bulgaria’2008 Conference Sofia - 5. January 2008 Dipl.-Ing. Jan Petersen – Vestas Central Europe Product Management / Electrical Engineering

Page 2 Vestas – No. 1 in Modern Energy Vestas Northern EuropeVestas MediterraneanVestas Central EuropeVestas Asia PacificVestas OffshoreVestas Americas Vestas Nacelles A/S Vestas Towers A/S Vestas Blades A/S Vestas Technology R&D Vestas People & Culture Vestas Control Systems A/S Vestas Central Europe

Page 3 Choosing the right turbine …is the key to a feasible wind power project Vestas has the world’s widest serial-produced turbine range V MW, Germany kW V kW 1.5 MW V MW 2.0 MW V MW V MW V MW V MW 3.0 MW V MW

Page 4 V90–2.0 MW High output in low to medium winds  Proven technology (V80)  Blade innovations of V90 in 3 MW class  Optimised for low to medium winds

Page 5 V MW The efficient way to more power  Cornerstone of the 3 MW class  Low weight  Low transportation costs  Lighter and stronger tower  New nacelle design generates more power  Blade innovations  Optimised for high winds and offshore installation

Page 6 V90- Technical specifications  Area swept: 6,362 m 2  Power regulation: Pitch/OptiSpeed ®  Air brake: 3 separate pitch cylinders  Generator: asynchronous with OptiSpeed ®  Control:  Microprocessor-based  OptiSpeed ® output regulation and optimisation  OptiTip ® pitch regulation V90-2MW V90-3MW  Nominal revolutions: 13.3 rpm 16.1 rpm  Cut-in wind speed: 3.5 m/s 4 m/s  Nominal wind speed: 13 m/s 15 m/s

Page 7 V90 – 3 MW Main components in the nacelle Pitch system Generator Coupling Anemometer Hub Yaw system Gearbox Transformer

Page 8 Proven Performance  Power output  Sound level  Power quality  Grid Compliance

Page 9 Grid Compliance  Large integration of wind power  Shift in requirements:  Acceptable turbine behavior ↓  Controllable wind power plant behavior  Focus moving from turbine connection point to PCC in sub station  Wind Power Plant

Page 10 Power Plant performance SCADA/PPC Lightning: TOV Switching: TOV Voltage control: Q/t Frequency control: P/t Power Factor / Voltage profile Protection coordination Grid faults: LVRT, TOV Frequency range

Page 11 Vestas SCADA introduction + = Power Plant Control “Supervisory Control And Data Acquisition”

Page 12 Why SCADA system?  Power Plant overview  Remote control  Remote monitoring  Management reporting  Preventive maintenance  Power Plant control SCADA turns a collection of Wind Turbines into a Wind Power Plant  Better Performance and Production The tool to save money for Customer and Vestas !! SCADA Is Not An Option

Page 13 VestasOnline ® Business – Wind Power Plant Control Fast precise control of:  Turbines  Statcon/SVC equipment  Capacitor banks  Switch gears  Tab changers

Page 14 SCADA in the Vestas Organisation Vestas Surveillance Centers Vestas Data Center (VDC) Vestas Performance & Diagnostic Center Customer Operation & Control Center SCADA Technicians, Service Vestas Management and Employees

Page 15 Preview WF Kavarna (2009)

Page 16 Thanks for your attention !