1. Gamesa Eólica New 2 MW WT: Gamesa G87-2.0 MW & G90-2.0 MW February 2006

2. 2 │ ▼ Gamesa Profile. 1 Gamesa Eolica product development 2 R&D Development. I Modular Vertical Integration. II Platform approach as the basis for Product Portfolio development III IV Gamesa G87-2.0 MW & Gamesa G90-2.0 MW Technologies Agenda

3. 3 │ ▼ Renewable Energies Aeronautics Wind Turbine Production Advanced Services Solar Installations -Promotion -Sell -Prediction -Agent -Design -Production -Components -O&M -Turn Key -Installation -Civil work -O&M -Thermal -Photovoltaic Development and sell of Wind Farms 1. Gamesa Profile Business Areas.

4. 4 │ ▼ Gamesa operates in the wind energy sector through three business units, leaders of their respective areas of promotion, manufacturing and services Advanced Services Depending on the local developers demand, Gamesa is able to provide a complete solution or a partial solution Control % Business Unit Activity 100% Wind Turbine Production Promotion of Wind Farms Gamesa Energía Gamesa Eólica Gamesa Servicios Resource Evaluation Micrositting Financing Structure WTG Design & Manufacturing Turn-key contracts Operation & Maintenance Transfer to 3rd Components Design& Manufacturing 1. Gamesa Profile. Renewable Energies Areas Business Units. Renewable Energies Areas

5. 5 │ ▼ Major investments in R&D allow Gamesa Eólica to guarantee its state-of-the-art technology in the long-term 5 R&D centers in Pamplona, Bilbao and Denmark. 247 employees. 60.9 mill. € invested in 2004, equivalent to 3.4% of the group turnover. Gamesa was ranked 5 th in Spain by R&D investment. Gamesa is among the top 200 European companies investing in R&D in 2004. 35 patents granted and 17 requested (by end of 2004). In 2004 Gamesa collaborated with 49 scientists and technologists in R&D projects. Gamesa UPB: Highly Accelerated Life Testing center. 2. Gamesa Eólica product development R&D Development.

6. 6 │ ▼ Gamesa Eólica transfers the maximal quality and cost advantages to its customers through this strategy Gamesa Eólica considers the tailor-made development of the major components as a necessary element for the excellence in the design and production of the wind turbines Blades Control Software GearboxesGeneratorsPower Electronics Towers Design Manufacturing O&M % of WTG Cost 20%5%15%10%5%20% 100% In House 50% In House60% In House 50% In House60% In House 100% In House 50% In House 2. Gamesa Eólica product development Modular Vertical Integration. 30% In House

7. 7 │ ▼ Number of Manufacturing Plants Constructed SurfaceTotal Surface 23 169.350 m 2 552.940 m 2 Gamesa Eólica counts on a large & geographically distributed industrial capacity to reduce logistics costs and enhance local value 2. Gamesa Eólica product development Modular Vertical Integration. Annual Production Capacity. TowersBladesRoot jointsBlade Moulds Generators & Converters Gearboxes 2.310 MW 275 u. 2.416 MW4.400 u. 8 G8X 1.200 MW 1.465 MW 6 Manufacturing Plants 2 Manufacturing Plants 6 Manufacturing Plants 1 Manufacturing Plant 1 Manufacturing Plant 3 Manufacturing Plants 4 Manufacturing Plants Nacelle

8. 8 │ ▼ PLATFORMRATED POWERPRODUCTSCHARACTERISTICS Gamesa G5X – 850 KW850 kWG52, G58 Experience and Profitability Gamesa G8X – 2.0 MW2 MWG80, G83, G87, G90 Versatility and Production 2. Gamesa Eólica product development Product Portfolio. Platform approach as the basis for Product development Modular strategy designing horizontal components for our product platforms which provide improved quality control, greater efficiency and flexibility

9. 9 │ ▼ MODELIECDIBT RATED POWER GRID CODE TOWER HEIGHTS NRS TM 50Hz60Hz G52 G58 G80 G83 G87 G90 IA IIIB IA IIA IIIA WZII WZII-III  WZII 850kW 2.000kW 44,55,60,65,74 44,55,60,65,71 60,67,78,100 67,78 67,78,100 Gamesa G5X-850 kW Gamesa G8X-2.0 MW 2. Gamesa Eólica product development Product Portfolio. Models and versions. Complete range of the multi-MW market through models with rotors adapted to site conditions to maximize Value and Profitability

10. 10 │ ▼ 2. Gamesa Eólica product development Product Portfolio. G8X Protopypes roadmap. 20022006200420032005 Jun 2005 G90 Protopype Almendarache (SPAIN) May 2004 G87 Protopype Lubián (SPAIN) Sept 2002 G80 Protopype Aguallal (SPAIN) Sept 2003 G83 Protopype Cinseiro (SPAIN) Nov 2003 G80 60Hz Protopype Koshizaki (Japan)

11. 11 │ ▼ ModelGAMESA G87 Rotor diameter87m Rated power2.000 kW Technology Pitch Dobly fed generator 3 stages gearbox Tower Heigh (m)67, 78, 100 IEC ClassIIA Maximizing cost efficiency per kwh by maximizing production in medium wind speeds. 42,5m blade using state-of-the-art manufacturing technology based on glass fibre, carbon fibre and pre-peg method for a lighter rotor design. Reduced sound level and Gamesa NRS TM for maximizing production while complying to specific noise restrictions. Grid connection technology that assures full national grid codes compliance. Gamesa SMP for predictive maintenance and Gamesa SGIPE for remote operation. Power density of 336 kW/m2 230 WTG installed by Dec. 2005. 2. Gamesa Eólica product development Product Portfolio. Gamesa G87-2.0 MW.

12. 12 │ ▼ ModelGAMESA G90 Rotor diameter90m Rated power2,000 kW Technology Pitch Doubly fed generator 3 stages gearbox Tower heigh (m)67, 78, 100 IEC ClassIIIA Maximizing cost efficiency per kwh by maximizing production in low wind speeds. 44m blade using state-of-the-art manufacturing technology based on glass fibre, carbon fibre and pre-peg method for a lighter rotor design. Reduced sound level and Gamesa NRS TM for maximizing production while complying to specific noise restrictions. Grid connection technology that assures full national grid codes compliance. Gamesa SMP for the predictive maintenance and Gamesa SGIPE for the remote control. Power density of 314 kW/m2 2. Gamesa Eólica product development Product Portfolio. Gamesa G90-2.0 MW.

13. 13 │ ▼ 2. Gamesa Eólica product development Gamesa G87-2.0 MW and Gamesa G90-2.0 MW. AEP Enhanced production for any wind resource through Gamesa G87 and Gamesa G90

14. 14 │ ▼ 2. Gamesa Eólica product development Gamesa G87-2.0 MW and Gamesa G90-2.0 MW. WT Components GEARBOX INTERCOOLERS CRANE TRANSFORMER BEARING HOUSES MAIN SHAFT MAIN FRAME COUPLINGGENERATOR DISC BRAKE A modular drive train for a reliable torque transmission to gearbox

15. 15 │ ▼ SUBSYSTEMSMAIN FEATURES ENVIRONMENTAL CONDITIONS Wind turbines designed for ambient temperatures ranging from –30º C to +40º C, with versions for corrosive or sandy enviroments. MECHANICAL SYSTEMS & AERODYNAMICS Modular 3-stage gearbox Main and secondary brake Active Yaw system Carbon and glass fiber reinforced composite blades ELECTRICAL SYSTEMS Doubly-Fed variable speed generator Built-in transformer CONTROL & INFORMATION SYSTEMS Pitch regulated and variable speed control SCADA: Gamesa SGIPE CMS: Gamesa SMP GRID CONNECTION Low Voltage Ride Through: Active Crowbar and Oversized Converter Active and Reactive power regulation: modules integrated in Gamesa SGIPE Frequency regulation: Embedded algorithm in PLC 2. Gamesa Eólica product development G87-2.0 MW and G90-2.0 MW Technologies.

16. 16 │ ▼ 2. Gamesa Eólica product development G87-2.0 MW and G90-2.0 MW Technologies. Environmental conditions I. LOW TEMPERATURE [-30º, +30º] STANDARD [-20º, +30º] HIGH TEMPERATURE [-20º, +40º] Close nacelle cover Air in lets and out lets, for the cooling system Air outlets for hot air from generator, converter and transformer Air heater to the main components of the nacelle Electric cabinets with heating resistances included. Inner air for gearbox, converter, hidraulic unit and generator. Direct inlet for gearbox Intercooler for the hydraulic unit Temperature Versions Nacelle changes Components changes Nacelle tune to match environmental conditions

17. 17 │ ▼ 2. Gamesa Eólica product development G87-2.0 MW and G90-2.0 MW Technologies. Aerodynamics Systems I. G90: 43,8 m. G80: 39 m. G87: 42,3 m. G83: 40,5 m. G8X blades 6.500 Kg 7.300 Kg 6.150 Kg 5.800 Kg Carbon fiber is used for obtaining more stiffness with lighter weights

18. 18 │ ▼ 2. Gamesa Eólica product development G87-2.0 MW and G90-2.0 MW Technologies. Aerodynamics Systems II. State-of-the-art manufacturing process. Blades made of composite with glass and carbon fiber reinforcement. Carbon fiber is used for obtaining more stiffness with lighter weights. Pre-preg manufacturing method Lightining protection system Delft University airfoils G8X blades characteristics

19. 19 │ ▼ 2. Gamesa Eólica product development G87-2.0 MW and G90-2.0 MW Technologies. Mechanical systems I. Improvements in Gamesa Active Yaw System The yaw is active with hydraulic brake clamp that can be regulated gradually. The system is composed of 5 clamps avoid fatigues and failures in the Yaw system. 4 electrical motors operated by WT controller based on information received from the anemometers mounted on top of the nacelle Subjected to High Accelerated Life Testing at Gamesa UPB Gamesa Active Yaw provides maximum adaptability to complex terrain

20. 20 │ ▼ 2. Gamesa Eólica product development G87-2.0 MW and G90-2.0 MW Technologies. Mechanical systems II. Front Frame One-piece casted part Larger yaw-gears to improve yaw control Approx. weight: 10,600 kg. Subjected to High Accelerated Life Testing at Gamesa UPB The one piece casted part front frame assures unique adecuation to the original design and resistance to (i) support the weight of the nacelle and (ii) transmit the loads to the tower

21. 21 │ ▼ 2. Gamesa Eólica product development G87-2.0 MW and G90-2.0 MW Technologies. Mechanical systems III. Gamesa UPB HALT of a Front Frame in the Gamesa UPB facilities High Accelerated Life Testing facilities for frames and yaw system. Frames and Yaw systems are subjected to cycles of extreme loads and fatigue. Results obtained help to assure high quality standards as well as giving feedback for design improvements The life testing facility assures critical mechanical components reliability in design process

22. 22 │ ▼ 2. Gamesa Eólica product development G87-2.0 MW and G90-2.0 MW Technologies. Mechanical systems IV. Designed for the load envelop of the whole platform: 2MW DFM IEC IA/IIA/IIIA and DIBtII/III 3 combined steps, one planetary and two parallel helicoidall Enjoys a lubrication system with an associated filtering system. Subjected to fatigue testing New Gearbox design Control sensors and Gamesa SMP accelerometers for predictive maintenance

23. 23 │ ▼ 2. Gamesa Eólica product development G87-2.0 MW and G90-2.0 MW Technologies. Electrical systems I. Generator Synchronous behaviour 4 poles Doubly-fed induction generation Variable Speed through rotor currents control Active and Reactive power control through control of rotor current amplitude and phase DF maximizes production and minimizes loads and noise levels in the most efficient way

24. 24 │ ▼ 2. Gamesa Eólica product development G87-2.0 MW and G90-2.0 MW Technologies. Electrical systems II. Transformer Three-phase, dry encapsulated type. Output Voltage from 6,6 to 34,5 kV Mounted inside the nacelle in G8X for reducing energy losses and visual impact LV protections Fuses in stator and rotor bushbar Neutral current relay Temperature sensors MV protections MV switchgear Spark sensor MV Surge Arrester

25. 25 │ ▼ 2. Gamesa Eólica product development G87-2.0 MW and G90-2.0 MW Technologies. Control systems I. Gamesa SGIPE SCADA designed and developed by GEOL Integrates WT management, weather masts and the electrical substations Graphic interface and Web access Optional modules: Active power, Reactive power regulation, Gamesa NRS TM, Wake effect control system and Shadow control. Modules for active and reactive power regulation, noise levels emission, wake effect control and shadow control

26. 26 │ ▼ 2. Gamesa Eólica product development G87-2.0 MW and G90-2.0 MW Technologies. Control systems II. Certified by Germanischer Lloyd Monitors critical parts of the WTG, process the data and gives information through SGIPE Predictive maintenance core technology Up to 8 accelerometers simultaneous management Gamesa SMP Serial CMS to anticipate to potential failures

27. 27 │ ▼ 2. Gamesa Eólica product development G87-2.0 MW and G90-2.0 MW Technologies. Control systems III. Noise reduction system. Interchangeable control version depending on the noise emission scheduling Assures maximum energy production complying with local regulations Several programmable parameters: date, day&night, season, wind direction, etc. Gamesa NRS TM

28. 28 │ ▼ ADVANCED VERSION Low Voltage Ride Through Fullfilment of main grid codes (REE, E.ON, FERC and others) for simmetrical and unsimmetrical faults Reactive regulation 0,95 lead – 0,95 lag in output terminals of the generator for all the power range. Active Regulation Response time: 5% Pr/s Frequency Regulation f<101%  100% Pr f>103%  65% Pr Response time: 5% Pr/s 2. Gamesa Eólica product development G87-2.0 MW and G90-2.0 MW Technologies. Grid connection I. Performance Summary P f

29. 29 │ ▼ 2. Gamesa Eólica product development G87-2.0 MW and G90-2.0 MW Technologies. Grid connection II. Low Voltage Ride Through Active Crowbar Oversized Converter Torque limiter Fullfilment of the low voltage ride-through requirements defined in the FERC, EON, Spanish, Ireland & Others Regulations

30. 30 │ ▼ 2. Gamesa Eólica product development G87-2.0 MW and G90-2.0 MW Technologies. Grid connection III. Reactive Power Reactive Power (cos PHI 0.95 as an option in 690V) ~ PLC.. Power measurement cos  P (MW) f (Hz) ~ PLC ~ ~ SGIPE SET control P, cos , f for automatic control P, Q setpoint RTU Dispatching Electrical Utility Network M.V. GAMESA SGIPE manages wtgs and SET equipment reactive output through connection to SET

31. 31 │ ▼ G87-2.0 MW and G90-2.0 MW Conclusions G80 G83 G87 G90 IA IIA IIIA WZII-III  WZII 2.000kW 60,67,78,100 67,78 67,78,100 Gamesa G87 & Gamesa G90 complete the Gamesa multi MW portfolio for medium and low winds MODELIECDIBT RATED POWER GRID CODE TOWER HEIGHTS NRS TM 50 Hz 60 Hz Gamesa G87 & Gamesa G90 provide the most efficient cost per kwh through the use of technologies to maximize production

32. THANK YOU VERY MUCH FOR YOUR ATTENTION