Appendix 10 Technical specification 1 (18)

WWD-1 1 MW

Technical specification

Ver 8-1/2003 Winwind Oy, Elektroniikkatie 2B, FIN-90570 OULU, Tel. +358-8-551 3255 www.winwind.fi Appendix 10 Technical specification 2 (18)

Contents

1. General...... 3 2. Tower...... 6 3. Rotor...... 6 4. 3-RR main bearing (three row cylinder bearing) ...... 7 5. Planetary gear ...... 7 6. Lubrication...... 8 7. Generator ...... 8 8. Brake system...... 8 9. Hydraulic system...... 9 10. Glassfiber cover ...... 10 11. ...... 10 12. Foundation...... 11 13. Grid connection ...... 11 14. Turbine control, remote monitoring and reporting ...... 12 14.1. Reporting...... 12 14.2. Transformation of production data into other information systems (optional) ...... 13 14.3. Presenting the production data on the Internet (optional) ...... 14 14.4. Remote control ...... 14 14.5. Alarms ...... 15 15. Self-diagnostic of the wind turbine ...... 15 16. Lightning protection...... 15 17. Anti-icing of blades...... 16 18. Aviation lights ...... 16 19. Maximum temperatures...... 16 20. Power curve...... 17

Information of this document is subject to change without notice. WinWinD® is a registered trademark of WinWinD Oy. This document contains general information about WWD-1 wind turbines. The exact scope of delivery shall is defined in Contents of the Delivery

Date Revision Author Remark Aug 2003 8/2003 Eku Document update Aug 2003 8-1/2003 EKu Dimensions updated Nov 2003 8-2/200 EKu Updated

Ver 8-1/2003 Winwind Oy, Elektroniikkatie 2B, FIN-90570 OULU, Tel. +358-8-551 3255 www.winwind.fi Appendix 10 Technical specification 3 (18)

1. General WinWinD has developed an innovative wind turbine for the market with its WWD concept. WinWinD’ s basic values include customer satisfaction and the operational reliability of the products, as well as the win-win co- operation achieved between the clients and WinWinD.

On the basis of thorough technical and economic research work the WWD concept, which allows electricity to be produced with a new innovative inte- grated power unit, was created. The basis for design was efficiency, reliabil- ity and ease of maintenance which allows the WWD concept to offer the most cost-effective production throughout its total life, combined with the lowest operating costs.

The drive train of the WWD-1 wind turbine consists of a single-stage plane- tary gear and a low-speed synchronous generator. This Multibrid®-concept combines the reliability of a direct drive and the compactness of a gear sys- tem. Low rotational speed together with precise dimensioning ensures reli- ability. The solution is suitable for a weak grid and also enables operation in a stand-alone mode.

Low maintenance costs are also benefits of the WWD-concept. The main- tenance is designed so that the production stops are minimized. This means, in practice, that all the maintenance is done on-site without expen- sive equipment. The used components have exceptional long maintenance cycle, which decreases maintenance costs as well.

General Type 3 blades, 4 degree tilt, up-wind Power control Pitch, variable speed Rated power 1000 kW Rotor diameter 60 meter Cut-in wind speed 3,0 m/s Rated wind speed 12,5 m/s Cut-out wind speed 20,0 m/s Design maximum 59,5 m/s (at hub height) Rotor speed 7,7-25,6 rpm Generator speed 44-146 rpm Rotor weight 20 000 kg

Ver 8-1/2003 Winwind Oy, Elektroniikkatie 2B, FIN-90570 OULU, Tel. +358-8-551 3255 www.winwind.fi Appendix 10 Technical specification 4 (18)

Nacelle weight 36 000 kg Colour of tower and RAL 7035 grey Colour of tower and nacelle RAL 7035 grey Classification IEC III, -7,5 m/s, 20 years (60 m)

Operating temperature -10...+ 35 ºC

Certification Germanischer Lloyd will certify the WWD-1 wind turbine.

The rotor is combined to the power unit using a custom-made three-row roller bearing (1). The roller bearing transfers the rotor loads directly to the main casing past the planetary gear and generator.

The single-stage planetary gear (2) has a planetary carrier that runs with the rotor. The planetary carrier runs the planet gears, which pass the power to the sun gear increasing the rotating speed ratio 5,71, that is, to 44-146 rpm. The low speed generator (3) produces the electricity, which is con- veyed to the frequency converter.

The direction and speed of the wind are measured by the anemometer and wind vane on the cooler. On the basis of the information of the wind vane, the drive train is turned using the yaw motor so that the blades face up- wind. The rotational speed is controlled by three independent electric pitches (4).

Ver 8-1/2003 Winwind Oy, Elektroniikkatie 2B, FIN-90570 OULU, Tel. +358-8-551 3255 www.winwind.fi Appendix 10 Technical specification 5 (18)

Ver 8-1/2003 Winwind Oy, Elektroniikkatie 2B, FIN-90570 OULU, Tel. +358-8-551 3255 www.winwind.fi Appendix 10 Technical specification 6 (18)

2. Tower

Hub height 56 m 66 m Tower length 53,5 m 63,5 m Number of sections 2 3 Weight 68 000 kg 90 000 kg Colour RAL 7035 RAL 7035

3. Rotor

The rotor consists of three blades, hub and three electrical pitches. The blades are made of epoxy resin reinforced glassfibre. The blades also act as aerodynamic brakes. Normally the blades are synchronised but in case of an emergency each blade can be con- trolled individually. The pitch system is electric and equipped with a back-up battery. The blades are equipped with lightning conduc- tors.

Rotor main data Rotor diameter 56 m / 60 m Swept area 2463 m2 / 2826 m2 Rated tip speed 75.6 m/s Specific power 406 W/m2 Rotor speed 7.7 – 25.6 rpm Rotor tilt 4 degrees Rotor cone angle 0 Tip’s distance from the tower 4.56 m Hub Manufacturer Metso Foundry (or a second source) Type Spherical graphite cast iron Material GJS-400-18 ULT

Blades Manufacturer EUROS GmbH (or a second source) Material Epoxy resin reinforced glassfibre Weight About 3300 kg (60 m version)

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Profile NACA / TUDELFT Total length 27.4 m (56 m version) Surface area About 40 m2 (56 m version) Cross sections 2.40 / 1.48 m Colour RAL 7035 grey Lightning protection Integrated lightning conductors

Power control (pitch) Type Electrically synchronised pitch, in case of an emergency independent pitch for each blade Manufacturer SSB GmbH (or a second source) Blade bearing 2-ballbearing Manufacturer HRE (or a second source) Gearing 3-stage planetary gear Manufacturer Bonfiglioli (or a second source) Maximum speed 20 degrees/s

4. 3-RR main bearing (three row cylinder bearing)

The main bearing is integrated to the hub and the supporting power unit. The bearing is lubricated with oil and protected against weather. The dou- ble lip seal is filled with grease.

3-RR bearing Manufacturer Hoesch-Rothe-Erde (or a second source) Material Ball races 42 CrMo 4 V Roller races 100 Cr 6 Weight About 1350 kg

5. Planetary gear

Planetary gear Manufacturer Metso Drives Type 1-stage, PL-540, helical gear Cooling Oil circulation and cooler Ratio 1:5.71

Ver 8-1/2003 Winwind Oy, Elektroniikkatie 2B, FIN-90570 OULU, Tel. +358-8-551 3255 www.winwind.fi Appendix 10 Technical specification 8 (18)

Lubrication Forced lubrication Oil type VG320 Oil change Annual check, change when needed

6. Lubrication

Hydraulic system Manufacturer Hydac Oy (or a second source) Oil type VG320 Cooling Separate cooler Heating Electric resistor

7. Generator

Generator Manufacturer ABB Helsinki Type AMG 1120SE20 DSEB Cooling Water jacket Rated power 1057 kW Rated voltage 660 V (internal voltage) Insulation category F Protection category Inside IP23, IP56 in general Grid connection Via IGBT-inverter

8. Brake system

Each rotor blade independently acts as an aerodynamic brake. The computer controls the system with the help of the anemometer and wind vane.

The stop procedures are:

The normal stop: the blades are synchronised and they are adjusted to the stop position 5 degrees/s without using any mechanical brakes.

Ver 8-1/2003 Winwind Oy, Elektroniikkatie 2B, FIN-90570 OULU, Tel. +358-8-551 3255 www.winwind.fi Appendix 10 Technical specification 9 (18)

The fast stop: the blades are adjusted to the stop position 15 degrees/s without using any mechanical brakes.

The emergency stop: the blades are adjusted to the stop posi- tion with the speed of about 20 degrees/s using the battery power. The mechanical brakes are used at the same time.

Each blade can be independently adjusted to the stop position. Each blade is equipped with a back-up battery. If one of the blade pitches fails, the syn- chronisation is turned off and each blade is driven separately to the storm position using the back-up battery.

The system meets the standards of Germanischer Lloyd. The standard does not require the mechanical brakes but that improves security and is used for locking the rotor during maintenance.

Aerodynamic brake Type 3 individual blade pitch Activation Electric

Mechanical brake Type Active hydraulic disc brake Number 2 Manufacturer Antec (or a second source) Location Behind the rotor, on the fast side Disc material S355 J2G3

9. Hydraulic system

Hydraulic system Manufacturer Hydac (or a second source) Hydraulic fluid VG 50 Heating Electric resistor

Ver 8-1/2003 Winwind Oy, Elektroniikkatie 2B, FIN-90570 OULU, Tel. +358-8-551 3255 www.winwind.fi Appendix 10 Technical specification 10 (18)

10. Glassfiber cover

Hub cover Manufacturer Kuitunikkarit (or a second source) Material Sandwich glassfiber Colour RAL 7035 grey

11. Yaw system

The wind vane on the roof of the drive train continuously monitors the direc- tion of the wind. The wind vane is equipped with an anti-icing system. When the direction of the wind changes, two geared yaw motors on top of the tower (at the level) turn on and the hydraulic brakes are loos- ened automatically.

Yaw bearing Manufacturer HRE (or a second source) Type One row prestressed ball bearing Material 42 CrMo 4, balls 100 CR 6

Yaw gearing Manufacturer Bonfiglioli (or a second source) Type 4-stage planetary gear Number 2 Yaw speed 0,75 degrees/s

Yaw motor Type Asynchronous motor Rated power 2,2 kW Protection IP54 Speed 940 r/min

Yaw brakes Manufacturer Antec (or a second source) Type Prestressed, active Number 6

Ver 8-1/2003 Winwind Oy, Elektroniikkatie 2B, FIN-90570 OULU, Tel. +358-8-551 3255 www.winwind.fi Appendix 10 Technical specification 11 (18)

12. Foundation

The foundation is a massive solid slab foundation laid either on ground or on pile foundation depending on the local ground conditions.

The tower shall be connected to the foundation by cylindrical flange or ground bolts.

13. Grid connection

WinWinD wind turbine is monitored by a programmable, digital central con- trol system, which analyses and controls the electricity production accord- ing to the digital data, provided by the sensors.

An IGBT inverter is used for connecting to the grid. The inverter is con- nected to an transformer either outside or inside the foundation. The volt- age level of the electricity fed to the grid is either 10 kV or 20 kV and the frequency either 50 Hz or 60Hz depending on the grid.

Monitoring Connecting equipment MITA Systems Main frame MITA WP3000 Type Microprocessors in parallel Grid connection IGBT AC inverter

AC inverter Manufacturer ABB (or a second source) Type 4 quadrant IGBT frequency con- verter Power ab. 1400 kVA Supply voltage 690 V (+ 10% / -15%) Supply mains’ frequency 48-63 Hz Water cooled

Minimum requirements of the transformer Power 1100 kVA Rated voltage 690 V Low-loss Static Screen

More information is available on document WWD-1 grid connection description

Ver 8-1/2003 Winwind Oy, Elektroniikkatie 2B, FIN-90570 OULU, Tel. +358-8-551 3255 www.winwind.fi Appendix 10 Technical specification 12 (18)

14. Turbine control, remote monitoring and reporting

WinWinD wind turbines can be connected to remote monitoring system us- ing an ISDN connection or an analogue telephone line. It is possible to use a GSM connection, too, if there are no landlines available.

14.1. Reporting

The remote control can be used for diverse monitoring of the functions of the wind turbine, e.g., basic data, (daily, weekly, monthly or annual) produc- tion and the status of different functions.

Example of the basic data:

In addition, the system gathers diverse data on production and functions. The following figure is an example of a daily power production report.

Ver 8-1/2003 Winwind Oy, Elektroniikkatie 2B, FIN-90570 OULU, Tel. +358-8-551 3255 www.winwind.fi Appendix 10 Technical specification 13 (18)

The graphic user interface is user-friendly and the outputs are clear. The following information, for example, is available real time: 9 Information on production and wind 9 Temperatures 9 Currents, voltages and power data 9 Rotational speed

The diagrammatic presentations and drawings include 9 Daily, monthly and annual production 9 The production data of the latest 24 hours at 10 minute intervals 9 Log events

The production data can be printed.

Mita-modules needed: • Mita Basic dongle

14.2. Transformation of production data into other information systems (op- tional)

The production data can be automatically retrieved from the wind turbine to the control room at fixed intervals. The data can then be converted to, for example, Excel or Access format. It is possible to produce an ASCII text file, as well.

Ver 8-1/2003 Winwind Oy, Elektroniikkatie 2B, FIN-90570 OULU, Tel. +358-8-551 3255 www.winwind.fi Appendix 10 Technical specification 14 (18)

This enables the client to make use of the diverse production data of the wind turbine in their own systems.

Mita-modules needed: • Mita Basic dongle • Mita AutoCall (to fetch information from turbines to office))

14.3. Presenting the production data on the Internet (optional)

The system enables presenting the production data of the wind turbines on the Internet. Access to the data can be free or a username with password can be used. Thus the production data can be viewed regardless of the place or time; the Internet-connection, however, is a necessity.

In addition, the client can upload the production data onto their own com- puter in Excel format, which makes further reporting smooth.

WinWinD modules needed: WinWinD Internet-based wind park production www- service

14.4. Remote control

Wind turbine can be remote controlled. Settings of the main frame can be changed also remotely. The wind turbine can be started and stopped using the remote control, too.

Mita-modules needed: • Mita Basic dongle

Ver 8-1/2003 Winwind Oy, Elektroniikkatie 2B, FIN-90570 OULU, Tel. +358-8-551 3255 www.winwind.fi Appendix 10 Technical specification 15 (18)

Mita Remote Display

14.5. Alarms

In case of a malfunction the system alarms and informs the central control room or any pre-programmed telephone number of the need for repair.

The alarm can also be forwarded from the central control room to the main- tenance personnel using either an SMS or e-mail (optional).

Mita-modules needed: • Mita Basic dongle (to receive the alarm call) • Mita Auto Alarm Dispatch (for e-mail)

WinWinD modules needed: From E-mail to SMS - module

15. Self-diagnostic of the wind turbine

The wind turbine is equipped with an automatic monitoring system, which continuously protects and controls the generator and the grid and adjusts the settings according to the wind and weather conditions. This way the power production can be optimised. During the cold season the sensors measure the need for heating of the power unit and lubrication oil and en- sure a safe start.

For case of a grid drop the wind turbine has an uninterruptible power sys- tem (UPS), which ensures the control for 3 minutes.

The anemometer and wind vane of the wind turbine monitor the changes in the wind and the technique starts and stops the plant according to the set- tings.

16. Lightning protection

The most advanced lightning protection technology in the field is used. The following principles are applied 9 Lightning conductor in each blade 9 Varistors and fuses in the connector casing of the generator 9 Varistors and fuses on the connectors of the inverter

Ver 8-1/2003 Winwind Oy, Elektroniikkatie 2B, FIN-90570 OULU, Tel. +358-8-551 3255 www.winwind.fi Appendix 10 Technical specification 16 (18)

9 Protected sensor cables 9 Overvoltage protection on the high voltage side of the transformer 9 Earthing of the tower according to the VDE 0185 standard 9 The functioning of the varistors and fuses signalled to the control computer

17. Anti-icing of blades

Anti-icing of the blades is not in use.

18. Aviation lights

Light intensity 10 cd *) Battery back-up (in case of grid failure) no Type of light fixed Light colour red GPS-synchronisation no Amount of lights per turbine 1 unit (consist of tens of leds) Type of the lamps led

*) ICAO (International Civil Aviation Organization) defines minimum requirements for obstacle lights: ICAO Type A, low-intensity, fixed red light: Minimum intensity 10 cd at +6° and +10° elevation angles, Vertical beam spread 10°

19. Maximum temperatures

When having +35 ºC or smaller outside temperature at hub height the production capacity is according the power curve.

When having more than +35 ºC outside temperature at hub height, the production capacity depends on temperature and wind speed. In some conditions, maximum power shall be temporarily limited.

Ver 8-1/2003 Winwind Oy, Elektroniikkatie 2B, FIN-90570 OULU, Tel. +358-8-551 3255 www.winwind.fi Appendix 10 Technical specification 17 (18)

20. Power curve

Below is presented the calculated power curve with rotor diameter of 56 m and 60 m. (Air density 1.225 kg/m3)

The following values are for WWD-1 / 56 m rotor

v (m/s) Ct Ce 11 0,70 0,401 22 0,08 0,063 1 0,81 0,000 12 0,57 0,378 23 0,07 0,055 2 0,81 0,000 13 0,41 0,305 24 0,06 0,048 3 0,81 0,228 14 0,32 0,244 25 0,06 0,042 4 0,81 0,322 15 0,25 0,199 5 0,81 0,380 16 0,21 0,164 6 0,81 0,408 17 0,17 0,136 7 0,81 0,413 18 0,14 0,115 8 0,81 0,418 19 0,12 0,098 9 0,81 0,419 20 0,11 0,084 10 0,76 0,419 21 0,09 0,072

Ver 8-1/2003 Winwind Oy, Elektroniikkatie 2B, FIN-90570 OULU, Tel. +358-8-551 3255 www.winwind.fi Technical specification 18 (18)

Ver 3/2002