In Bremerhaven, a test rig is being developed that can test complete wind turbine nacelles in the multi-megawatt class. Unprecedented: a load transmission system mechanically simulates the wind loads occurring in the field. The researchers are investigating the electrical components using a simulated electricity grid. Laboratory tests are also providing information on how wind turbine concepts ...

wind power has been widely considered in recent years as an available and a clean renewable energy source. the cost of wind energy production is currently the main issue, and increasing the size of wind turbines can reduce wind energy production costs. hence, megawatt wind turbines are being rapidly developed in recent years. in this paper, an aerodynamic analysis of the nrel 5mw turbine is car...

Wind power has been widely considered in recent years as an available and a clean renewable energy source. The cost of wind energy production is currently the main issue, and increasing the size of wind turbines can reduce wind energy production costs. Hence, megawatt wind turbines are being rapidly developed in recent years. In this paper, an aerodynamic analysis of the NREL 5MW turbine is...

Wind power has been widely considered in recent years as an available and a clean renewable energy source. The cost of wind energy production is currently the main issue, and increasing the size of wind turbines can reduce wind energy production costs. Hence, megawatt wind turbines are being rapidly developed in recent years. In this paper, an aerodynamic analysis of the NREL 5MW turbine is...

Historically, wind machines were used for grinding grain in Persia as early as 200 BC. Wind turbines have been in use since 1941 when the world’s first megawatt-size wind turbine was connected to the local electrical distribution system in Vermont, USA. The function of a modern power-generating wind turbine is to generate high quality, network frequency electricity. To give an example of the sc...

Taylor’s frozen turbulence hypothesis is tested in its applicability for wind turbine applications. In this research full field measurements are performed at a test site for multi-megawatt wind turbines by means of a pulsed LIDAR with a scanning device. The system is installed at the top of the nacelle of a 5 MW wind turbine. It provides simultaneous wind speed, with a maximum sampling rate of ...

Advances in wind turbine technology have allowed the machines to take advantage of economies of scale. The increased size and power requirements of modern turbines have presented new challenges to the more expensive components, particularly the gearboxes. This paper focused on a new control system for wind turbines in above-rated, or Region 3, wind regimes. The control goals were to regulate th...

In recent years wind energy has been the world’s fastest growing source of energy. The wind turbine industry is booming and is spending a lot on research for improving the performance of its present machines and increasing their capacity. However, upscaling of the classical drivetrain concept is no longer economically feasible for machine power of 2 MW and higher. This paper presents the prelim...

by John A. Cooney, Jr. In order to e↵ectively realize future goals for wind energy, the e ciency of wind turbines must increase beyond existing technology. One direct method for achieving increased e ciency is by improving the individual power generation characteristics of horizontal axis wind turbines. The potential for additional improvement by traditional approaches is diminishing rapidly ho...