نتایج جستجو برای: wind turbines

تعداد نتایج: 86431  

2011
Xiangyu Zhang Yi Wang Heming Li

1 Abstract-This paper investigates the control scheme of the permanent magnet synchronous generator (PMSG)-based wind turbines to improve the power system damping. Based on the analysis of the operation characteristics and control scheme of the PMSG-based wind turbines, the relationship between the dc side voltage fluctuation of the full scale power converter and the active power regulation of ...

2014
Jesper Hvass Schmidt Mads Klokker

BACKGROUND Wind turbine noise exposure and suspected health-related effects thereof have attracted substantial attention. Various symptoms such as sleep-related problems, headache, tinnitus and vertigo have been described by subjects suspected of having been exposed to wind turbine noise. OBJECTIVE This review was conducted systematically with the purpose of identifying any reported associati...

2017
Shiyu Liu Gengfeng Li Haipeng Xie Xifan Wang Frede Blaabjerg

As the scale of wind power bases rises, it becomes significant in power system planning and operation to provide detailed correlation characteristic of wind speed in different geographical hierarchies, that is among wind turbines, within a wind farm and its regional wind turbines, and among different wind farms. A new approach to analyze the correlation characteristics of wind speed in differen...

2016
Koichi Watanabe Shuhei Takahashi Yuji Ohya

The effects of using a wind acceleration device (wind lens) with vertical-axis wind turbines in wind tunnel experiments were examined. A wind lens consists of a diffuser and flanges, and this study investigated the optimum parameters of their configuration with regard to the power augmentation of the turbines. The wind lens with a flat-panel-type diffuser demonstrated power augmentation by a fa...

2008
Andrew Kusiak

The growing demand for wind power has resulted in a market that naturally favors development of new wind farms over improvement of their performance. A chain of opportunities for performance improvement of any wind energy project parallels the supply chain activities. Raising energy and transportation costs are a complicating factor of the performance improvement projects. One of the weakest po...

Journal: :energy equipment and systems 0
hamid moradtabrizi school of mechanical engineering, college of engineering, university of tehran, tehran, iran edris bagheri school of mechanical engineering, college of engineering, university of tehran, tehran, iran amir nejat school of mechanical engineering, college of engineering, university of tehran, tehran, iran hamid kaviani school of mechanical engineering, college of engineering, university of tehran, tehran, iran

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...

2010
Zsolt János Viharos László Monostori Gábor Erdős András Kovács

The paper describes the result of the research in the fields of supervision, failure detection and prognosis, control, maintenance planning and decision support performed for ensuring high level availability of wind turbines and wind farms. This activity is realized in the frame of the EU 7th Framework project ReliaWind: Reliability focused research on optimizing Wind Energy systems design, ope...

2010
Zsolt János Viharos Gábor Erdős András Kovács László Monostori

The paper describes the result of the research in the fields of supervision, failure detection and prognosis, control, maintenance planning and decision support performed for ensuring high level availability of wind turbines and wind farms. This activity is realized in the frame of the EU 7th Framework project ReliaWind: Reliability focused research on optimizing Wind Energy systems design, ope...

Journal: :Bioinspiration & biomimetics 2010
Robert W Whittlesey Sebastian Liska John O Dabiri

Most wind farms consist of horizontal axis wind turbines (HAWTs) due to the high power coefficient (mechanical power output divided by the power of the free-stream air through the turbine cross-sectional area) of an isolated turbine. However when in close proximity to neighboring turbines, HAWTs suffer from a reduced power coefficient. In contrast, previous research on vertical axis wind turbin...

2009
Vedrana Spudić

The paper describes the hierarchical control concept for wind farm power/load optimization with emphasis on compensation of disturbances. The control concept was developed for the EU-FP7 project Distributed Control of Large-Scale Offshore Wind Farms – Aeolus. The Aeolus project approaches the wind farm control problem by considering wind turbines in a wind farm as individual power actuators aff...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید