LIDAR systems are able to provide preview information of wind speed, direction and shears at various distances in front of the wind turbines. This technology paves the way for new control concepts such as feedforward control and model predictive control to increase the energy production and to reduce loads of wind turbines. This paper describes how the necessary information can be obtained from...

Wind turbines are being introduced into the distribution and transmission networks of Europe in increasing numbers. Their reliability has become a factor in network reliability. This has been exemplified by a report from Germany about the reserve necessary to maintain a secure supply with high levels of wind-powered generation in the system. Some difficulty arises because of the variable nature...

Offshore wind turbines face ever increasing challenges from the harsh environment of humidity, corrosion, vibration etc. at sea. The effect of the environment on the equipment employed at sea has caused many problems in terms of delay of projects, reduced reliability, down periods etc. Knowledge of the electrical, climatic and mechanical conditions to be conquered and their impact on the differ...

Individual wind turbines, whether stand alone or in a wind farms, typically operate to maximize their own production without considering the impact of wake effects on nearby turbines. Investigation into wind turbine interaction within a wind farm has the potential to increase total power and reduce structural loads by properly coordinating the individual turbines that comprise the wind farm. To...

in recent years, based on the growing importance of clean energy in comparison with conventional energy production from fossil fuels, dg systems are gradually becoming more popular all over the world. these resources solve many problem of system. however, these resources create some other problems too. one of the most problem of dgs is unwanted islanding. this paper addresses reliable passive i...

An experimental study was conducted to characterize the dynamic wind loads and evolution of the unsteady vortex and turbulent flow structures in the near wake of a horizontal axis wind turbine model placed in an atmospheric boundary layer wind tunnel. In addition to measuring dynamic wind loads (i.e., aerodynamic forces and bending moments) acting on the wind turbine model by using a high-sensi...