Offshore wind farms have recently emerged as promising renewable energy sources. For increasing distances between offshore generation and onshore distribution grid, HVDC transmission systems based on voltage source converters can be a feasible and competitive solution. This thesis presents a comprehensive evaluation of a novel integrated wind farm topology that includes the generator drive syst...

In offshore wind turbines, the blades are among the most critical and expensive components that suffer from different types of damage due to the harsh maritime environment and high load. The blade damages can be categorized into two types: the minor damage, which only causes a loss in wind capture without resulting in any turbine stoppage, and the major (catastrophic) damage, which stops the wi...

Wind energy in the deep-sea area is more abundant and capacity of wind turbines can be made larger. Therefore, research on floating offshore will primary strategy for exploitation future. The spar-type platform depends characteristics a small water plane, deep draft, good stability, which has been applied to commercial development energy. In next ten years, 10-MW turbine become mainstream class...

This paper analyses the dynamics loads exerted by waves on a floating offshore platform in Straits of Messina, (South Italy), hosting an innovative ducted wind turbine. The force largest sea occurring during lifetime are predicted quasi-determinism theory, which foresees what happens if group exceptionally large height occurs at given point sea.

-This paper provides a comprehensive survey on the state-of-the-art condition monitoring and fault diagnostic technologies for wind turbines. The Part I of this survey briefly reviews the existing literature surveys on the subject, discusses the common failure modes in the major wind turbine components and subsystems, briefly reviews the condition monitoring and fault diagnostic techniques for ...

Renewable energy concepts are able to sustainably satisfy the world energy demand without any restrictions for the following generations. In these concepts the wind energy and wave/ocean current energy are important factors as the description and the prognosis of waves and currents is a complex issue, especially offshore. For the estimation of the average annual wind speed and thus the energy p...

Wind energy developments offshore focus on larger turbines to keep the relative cost of the foundation per MW of installed capacity low. Hence typical wind turbine hub-heights are extending to 100 m and potentially beyond. However, measurements to these heights are not usually available, requiring extrapolation from lower measurements. With humid conditions and low mechanical turbulence offshor...

The development of novel energy technologies to meet net zero carbon emission is essential in the provision solutions realize an increasing worldwide demand for renewable energy. Floating Offshore Wind Turbine (FOWT) one emerging exploit vast wind resources available deep waters within offshore sector. However, as a result complexity FOWT system, bringing technology up speed requires detailed u...

The size of wind turbines has been growing fast in recent years with the largest now exceeding 7MW. Furthermore, this trend is expected to continue for the offshore sector. However, this increase in size is accompanied by an increase in the dynamic loading on the structure, in particular, unbalanced loads on the blade and hub. Apart from making wind turbine components more load tolerant, e.g. t...