Results 341 to 350 of about 3,942,784 (376)
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Short-Term Wind Speed Forecasting via Stacked Extreme Learning Machine With Generalized Correntropy
IEEE Transactions on Industrial Informatics, 2018Recently, wind speed forecasting as an effective computing technique plays an important role in advancing industry informatics, while dealing with these issues of control and operation for renewable power systems.
Xiong Luo +7 more
semanticscholar +1 more source
Neuroadaptive Variable Speed Control of Wind Turbine With Wind Speed Estimation
IEEE Transactions on Industrial Electronics, 2016It is difficult to measure the wind speed accurately in short term. This reveals challenges for wind turbine control, especially for maximum power point tracking with adaptive control strategies. In this paper, a genetic algorithm based support vector machine model is adopted to estimate the wind speed, using physically measurable signals, such as the ...
Zi-Jun Jia +5 more
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Data‐driven wind speed forecasting using deep feature extraction and LSTM
IET Renewable Power Generation, 2019Wind speed forecasting is important for high-efficiency utilisation of wind energy and management of grid-connected power systems. Due to the noise, instability and irregularity of atmosphere system, the current models based on raw historical data have ...
Yu-Xi Wu, Qing-biao Wu, Jia-Qi Zhu
semanticscholar +1 more source
The Journal of the Acoustical Society of America, 1987
Wind is the large-scale movement of air from one place to another. It is usual for the air to become horizontally stratified, the layers nearer the ground moving more slowly than or in a different direction to those higher up. This change of wind speed with height is known as wind gradient (or wind shear), and it may cause serious problems for aircraft
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Wind is the large-scale movement of air from one place to another. It is usual for the air to become horizontally stratified, the layers nearer the ground moving more slowly than or in a different direction to those higher up. This change of wind speed with height is known as wind gradient (or wind shear), and it may cause serious problems for aircraft
openaire +2 more sources
IEEE transactions on energy conversion, 2019
Large-scale wind farms are generally integrated by long-distance transmissions, but power grids cannot sufficiently support the access point voltage of these wind farms.
J. Ouyang +3 more
semanticscholar +1 more source
Large-scale wind farms are generally integrated by long-distance transmissions, but power grids cannot sufficiently support the access point voltage of these wind farms.
J. Ouyang +3 more
semanticscholar +1 more source
Characterization of Wind Meandering in Low-Wind-Speed Conditions
Boundary-Layer Meteorology, 2016Investigation of low-wind cases observed during the Urban Turbulent Project campaign (Torino, Italy) and at the Santa Maria meteorological station (Santa Maria, Brazil) provides insight into the wind-meandering phenomenon, i.e. large, non-turbulent oscillations of horizontal wind speed and temperature. Meandering and non-meandering cases are identified
Mortarini +11 more
openaire +4 more sources
2006
Under high wind speed conditions breaking waves disrupt the air-sea interface producing a two-phase zone—air bubbles in water and sea spray in air. This mixed-phase environment changes the regime of air-sea interaction. In this chapter, after reviewing dynamics of air-bubbles and sea spray droplets in detail, the reader is exposed to the idea that ...
Roger Lukas, Alexander Soloviev
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Under high wind speed conditions breaking waves disrupt the air-sea interface producing a two-phase zone—air bubbles in water and sea spray in air. This mixed-phase environment changes the regime of air-sea interaction. In this chapter, after reviewing dynamics of air-bubbles and sea spray droplets in detail, the reader is exposed to the idea that ...
Roger Lukas, Alexander Soloviev
openaire +2 more sources
ACS Nano, 2018
Triboelectric nanogenerators (TENGs) are attracting more and more attention since they can convert various mechanical energies into electric energy.
Peihong Wang +7 more
semanticscholar +1 more source
Triboelectric nanogenerators (TENGs) are attracting more and more attention since they can convert various mechanical energies into electric energy.
Peihong Wang +7 more
semanticscholar +1 more source
Robust Wind Speed Estimation and Control of Variable Speed Wind Turbines
Asian Journal of Control, 2018AbstractIn this work, a robust control scheme for variable speed wind turbine system that incorporates a doubly feed induction generator is described. The sliding mode controller is designed in order to track the optimum wind turbine speed value that produces the maximum power extraction for different wind speed values.
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Low wind speed wind generation scheme
Renewable Energy, 1994Conventional wind generators operating in widely fluctuating wind regimes suffer from low energy conversion efficiencies. In this paper a relatively simple scheme is described for increasing the power output of small wind-driven alternators at low wind speeds.
D. Johnston, W. Lawrence, D. Langridge
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