نتایج جستجو برای: wind turbines

تعداد نتایج: 86431  

2007
Dušan Medveď

This paper deals with main design of wind turbine concerning with structure of wind turbines, option between vertical and horizontal axis wind turbines to optimising count of rotor blades

2015
Jakub Bukala

terms of pre-selection of the aero layouts best suited for further optimization Abstract The first task within the STOW project was 'analytical – theoretical study in terms of pre-selection of the aero layouts best suited for further optimization' for universal Polish wind conditions. It was carried out by an extensive literature study on classic wind turbine configurations (two, tree –bladed h...

2017
Bhim Singh Shailendra Sharma Dong-Choon Lee S. A. Papathanassiou

Integration of wind turbine based on doubly fed induction generator (DFIG) into the electrical grid has become an important part of electrical generation in many countries and its importance is continuing to increase. A few of them are various speed generations, the decoupled control of active and reactive power and high power capacity. The current and future wind power situation is modeled as ...

This paper aims to investigate transition paths and reasons of failure of Iran’s wind turbines industry in transition to sustainability successfully. In this regard, a qualitative approach and case study strategy have been used. For this purpose, based on type of national innovation system, the transition path and sustainability transition status of the wind turbines industry in selected countr...

2015
L. Norin

In many countries wind turbines are rapidly growing in numbers as the demand for energy from renewable sources increases. The continued deployment of wind turbines can, however, be problematic for many radar systems, which are easily disturbed by turbines located in the radar line of sight. Wind turbines situated in the vicinity of Doppler weather radars can lead to erroneous precipitation esti...

2017
Mostafa Abarzadeh Hossein Madadi Liuchen Chang

Although fossil fuel is the main energy supplier of the worldwide economy, due to its ad‐ verse effects on environment, the scientists look for alternative resources in power genera‐ tion. Electricity generation using renewable energy has been well recognized as environmentally friendly, socially beneficial, and economically competitive for many appli‐ cations. Wind turbines, photovoltaic syste...

2012
David Schlipf

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...

2015
P. J. Tavner J. Xiang

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...

2005
Susanne Otto

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...

2014
Jennifer Annoni Kevin Howard Peter Seiler Michele Guala

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...

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