A review on development of offshore wind energy conversion system

Li, Jinjiang; Wang, Guandao; Li, Zhiheng; Yang, Shunkun; Chong, Wen Tong; Xia, Xiang

doi:10.1002/er.5751

Cited by 130 publications

(51 citation statements)

References 113 publications

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“…The WQD is calculated from Equation (5,6) for a set of threshold levels on the horizontal axis as in Figure 5.…”

Section: Applicationmentioning

confidence: 99%

“…Compared to land-based wind energy technology, although OWEC started later, it has attracted more attentions due to its significant advantages in sufficient wind energy, low wind shear, high power output, and low land occupancy rate. 6 Another study provides insights on the main variables used in wind energy feasibility studies. The results may assist researchers and investors to identify the key parameters that are being examined in the literature and to evaluate, which ones should be considered in their study to ensure a sustainable development of power generation through the wind source.…”

Section: Introductionmentioning

confidence: 99%

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Wind quality designation concept and application

Şen

Serencam

2021

Intl J of Energy Research

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Generally, wind energy production is based on the average wind speed without any classification. This article proposes a classification system on the basis of wind speed durations greater than a given threshold value. For this purpose, the wind quality designation (WQD) concept is defined based on the wind potential duration, amount, and intensity on a threshold level. Its classifications are depicted on five risk percentage classes as "excellent," "very good," "good," "fair," and "weak. Apart from the classification, the change of WQD with wind speed threshold provides qualitative and quantitative wind speed energy production assessment. The specific objective of the article is to present theoretical WQD explanations on the basis of the most frequently employed two-parameter Weibull probability distribution function (PDF). The application is provided for Adiyaman City, Kahta meteorology station wind speed records from the Southeastern province of Turkey. It is noticed that there is no "Weak" category at this station and the most effective quality class is "Excellent" from 14 m/s to almost 27 m/s wind speeds. The average wind speed corresponds to about 62% WQD. Finally, the wind speed potential durations PDF abides by the logarithmic-normal PDF, whereas amount and intensity accord with the Weibull PDFs.

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“…The WQD is calculated from Equation (5,6) for a set of threshold levels on the horizontal axis as in Figure 5.…”

Section: Applicationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Wind quality designation concept and application

Şen

Serencam

2021

Intl J of Energy Research

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“…In addition, the outbreaks of sick building syndrome (SBS) in developed countries in the 1970s and 1980s, severe acute respiratory syndrome coronavirus (SARS) in Asia in 2003, and Corona Virus Disease 2019 (COVID-19) that has been sweeping the world since late 2019 have led people to think deeply about the safety and health of their offices and living spaces, with suitable temperature and humidity being achieved in enclosed spaces by mechanical means in modern architecture. The total wind energy resource reserves of China at the height of 10 m above the ground are about 4.35 billion KW, which ranks first in the world [9]. Considering the abundance of wind energy resources, land use types, and landforms, and the variability of wind energy, the regions with the most abundant sources of wind energy are the Tibet Plateau, the Hexi Corridor, and Inner Mongolia [10].…”

Section: Venturi Capmentioning

confidence: 99%

“…The total wind energy resource reserves of China at the height of 10 m above the ground are about 4.35 billion KW, which ranks first in the world [9]. Considering the abundance of wind energy resources, land use types, and landforms, and the variability of wind energy, the regions with the most abundant sources of wind energy are the Tibet Plateau, the Hexi Corridor, and Inner Mongolia [10].…”

Section: Introduction 1the Necessity Of Natural Ventilationmentioning

confidence: 99%

Study on the Influence and Optimization of the Venturi Effect on the Natural Ventilation of Buildings in the Xichang Area

et al. 2021

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Natural ventilation is a way to reduce the energy consumption of building operations and improve the indoor living environment comfort. The venturi cap is designed with a roof, grille and wind deflector to intensify the natural ventilation of buildings. The structural parameters of the venturi cap were designed using an orthogonal design. Fluid analysis software was used for numerical simulation, and variance analysis was used to study the importance of seven influence factors: the width of the roof opening, the roof slope, the height of the wind deflector, the horizontal width of the wind deflector, the angle of the wind deflector, the angle of the grille, and the spacing of the grille slices. The results show that the most significant influencing factor is the width of the roof opening, while significant influence factors include the angle of the grille and the horizontal width of the wind deflector. Additionally, the optimum parameter combination for ventilation performance at the research level was put forward, with the proposed combination achieving a volume flow rate of 5.507 m3/s. The average temperature of the horizontal plane at a height of 1.2 m above the ground was 3.002 K lower than that without a venturi cap, which provides a reference for the optimization of indoor ventilation design in buildings in the Xichang area.

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“…This has led to a shift of research focus from shore to offshore wind turbines. The advantages of offshore wind turbines can be found in utilizing high-speed, stable wind resources, and reducing wind shear and physical constraints caused by hills or artificial buildings [2,3].…”

Section: Introductionmentioning

confidence: 99%

Variable-Gain Higher-Order Sliding Mode Pitch Control of Floating Offshore Wind Turbine

Han

Pan

et al. 2021

JMSE

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A variable-gain higher-order sliding mode pitch control strategy is proposed for a strongly nonlinear and coupled floating offshore wind power system. The main goal of the proposed strategy is to suppress platform motion caused by random disturbances such as waves and wind speed and to reduce fatigue loads and power fluctuations. Feedback control and super-twisting second-order sliding mode algorithm were adopted to carry out collective pitch control and track the rated rotor speed, which involves the factor of platform pitch. To adaptively adjust the collective pitch control parameters according to random wave and wind speed disturbances, the barrier function method was used to conceive adaptive sliding mode control gains. For comparison purposes, the proposed control strategy and PI control were executed under different wind and wave conditions on a FAST and MATLAB/Simulink platform. Furthermore, the fatigue load was calculated by Mlife. The results demonstrate that the proposed scheme is effective and robust. Moreover, it has advantages in resisting external disturbances, especially in suppressing the platform pitch and roll, as well as reducing the power fluctuations and the fatigue load on the blade root.

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A review on development of offshore wind energy conversion system

Cited by 130 publications

References 113 publications

Wind quality designation concept and application

Wind quality designation concept and application

Study on the Influence and Optimization of the Venturi Effect on the Natural Ventilation of Buildings in the Xichang Area

Variable-Gain Higher-Order Sliding Mode Pitch Control of Floating Offshore Wind Turbine

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