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EWT 900kW DIRECTWIND
Wind Turbine
- A new generation of wind turbines of 750 and 900 kW.
- For all wind regimes (wind class 1, 2, 3).
- Using the highly advanced direct drive technology
- Availability optimized to its maximum.
- Maintenance procedures simplified and maintenance time reduced substantially.
- Full variable speed
- Full power back-to-back power converter.
- Electrical power of an excellent quality (cos phi adjustable).
- Less noise production than gear-box based turbines
| EWT 900kW Company Information Emergya Wind Technologies BV (EWT) is a new Dutch wind turbine supplier specialised in the development and manufacture of advanced high-quality direct drive (gearless) wind turbines. Our new 750 kW and 900 kW models feature variety of rotor diameters and hub heights. EWT starting point was the Intellectual Property Rights (IPR) acquisition including all strategic know-how of former wind pioneer Lagerwey the WindMaster. These key assets together formed a strong basis on which EWT commenced commercial operations in February 2004. EWT is determined to become one of the world’s leading suppliers of high performance direct drive wind turbines. Key objectives are to offer our customers reliable top quality products with lowest energy generating cost during a twenty-year operational lifetime. This ambition will be met by a combination of market driven evolutionary product development, organic growth, strategic partnerships and acquisitions. |
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EWT 900 Features EWT’s pitch controlled variable speed models wind turbine combines advanced technology with mechanical simplicity and superior systems reliability. Heart of this proven direct drive turbine is a long-lasting slow rotating EWT-design multi-pole ring generator. This reliable drive solution with a track record of over 200 operational units worldwide, replaces a complex high-speed geared drive train common in most competitor wind turbines. A large single main bearing carries both the rotor assembly and generator rotor, and reduces the number of rotating components even further. And the load-optimised ‘monocoque type’ main chassis enables easy service access to essential rotor hub internals like rotor blade pitch drives and battery back-up units. |
| Grid quality features The turbine feeds generator power into the grid by means of a modern ‘back-to-back’ type full-converter system. This converter contains a number of programmable functions like a capability to limit output during night hours as a noise reduction measure. Built-in grid-fault-ride-through technology is available on demand. All advanced grid features combined turn the into a perfect choice for solitary applications, weak grids, high-turbulence sites, and demanding locations where specific environmental demands have to be met. The combination of advanced control features and proven wind technology makes the also a first-class choice with regard to energy yield and overall return on investment. |
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EWT 900 Features EWT’s pitch controlled variable speed models wind turbine combines advanced technology with mechanical simplicity and superior systems reliability. Heart of this proven direct drive turbine is a long-lasting slow rotating EWT-design multi-pole ring generator. This reliable drive solution with a track record of over 200 operational units worldwide, replaces a complex high-speed geared drive train common in most competitor wind turbines. A large single main bearing carries both the rotor assembly and generator rotor, and reduces the number of rotating components even further. And the load-optimised ‘monocoque type’ main chassis enables easy service access to essential rotor hub internals like rotor blade pitch drives and battery back-up. |
Specifications
Rotor diameter 51.5m (750 kW)
51.5m or 54.0m (900 kW)
Rotor speed Variable, 12 - 28 rpm
Nominal power output 750 kW
900 kW
Cut-in wind speed 2.5 m/s
Rated wind speed 13 m/s
Cut-out wind speed 25 m/s, 10 minute average
Survival wind speed 59.5 m/s
Power output control pitch controlled variable speed |
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Drive system
Generator Synchronous air-cooled EWT-design, multi-pole, wound-rotor
Power converter Full-power, IGBT-controlled AC-DC-AC ‘back-to-back’ type |
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Tower
Type Conical tubular steel, internal ascent
Hub heights 40, 50 and 75 m
Safety systems
Main brake action Individual rotor blade pitch (three independent brakes)
Fail-safe brake Individual rotor blade pitch
by three independent battery-powered back-up units
| Turbine Summary |
| Rated Power Output |
900 kW |
| Annual Output at 6m/s |
1,736 MWh |
| Annual Output at 7m/s |
2,368 MWh |
| Estimated Installed Cost |
£950,000 |
| Potential Annual Saving/Revenue |
£360,000 |
*Assumes an Offset Value of 10p/kWh and ROCs
taken at £50/MWh |
Download information on Foundation loads PDF
FOR MORE INFORMATION ON OUR PRODUCTS AND SERVICES
PLEASE RING 01502 515532 or e-mail:- info@solarenergyalliance.com.
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