Rationality research of the adjustment law for the blade pitch angle of H-type vertical-axis wind turbines

Zhang, Lijun; Gu, Jianwen Wendy; Zhu, Huaibao; Hu, Kuoliang; Li, Xiang; Jiao, Liuyang; Miao, Junjie; Liu, Jing; Wang, Zhiwei

doi:10.1016/j.renene.2020.11.104

Cited by 9 publications

(2 citation statements)

References 20 publications

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“…Varying the pitch with blade azimuth to reduce the amplitude of the AoA is a direct way to improve the power coefficient and reduce the fatigue load [6], which has been confirmed by some research. Melani et al [7] investigated a variable pitch system based on a double-cam desmodromic structure and optimized the pitching parameters at the TSR optimal for the original VAWT.…”

Section: Introductionmentioning

confidence: 68%

Study on the Pitch Angle Effect on the Power Coefficient and Blade Fatigue Load of a Vertical Axis Wind Turbine

Hao,

Abdi,

Wang

et al. 2023

Energies

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For vertical axis wind turbines (VAWTs), the increase of the incoming wind speed higher than the rated value will make the tip speed ratio (TSR) lower and lower, resulting in the blade fatigue load becoming more and more severe and the power coefficient weakening gradually. This paper explores whether varying the pitch with the TSR decrease is necessary for improving the power coefficient and reducing the fatigue load. Specifically, the pitch angle effect on the power coefficient and fatigue load of a VAWT at different TSRs was studied by the computational fluid dynamics method. The results show that the optimal pitch angle in terms of the power coefficient varies with the TSR, which means that varying the pitch with the TSR decrease can improve the power coefficient. Meanwhile, the principle to guide the pitch variation is to avoid flow separation in the downwind zone and minimize the angles of attack (AoAs) in the upwind zone. At the lowest TSR of 1.7 in the present work, varying the pitch from the optimal one in terms of the power coefficient reduced the blade normal force amplitude significantly, which is mainly attributed to avoiding the vortex–blade encounter and minimizing the AoAs in the downwind zone. The vortex–blade encounter at the lowest TSR is an important phenomenon related to the variation of the blade torque and blade normal force and will weaken and disappear with the pitch angle increase.

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Section: Introductionmentioning

confidence: 68%

Study on the Pitch Angle Effect on the Power Coefficient and Blade Fatigue Load of a Vertical Axis Wind Turbine

Hao,

Abdi,

Wang

et al. 2023

Energies

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“…In order to do this, both the starting stage and stable rotation stage of the turbine have been examined, and a numerical coupling model has been developed and validated to simulate the interaction between the wind flow and the induced turbine rotation. In [40], Based on dynamic experimental data, this study determines the ideal blade angle of attack in the upwind and downwind zones with the goal of maximizing the tangential force coefficient. The vertical axis WT's complicated flow field's influence on the amplitude and direction of induced velocity change.…”

Section: Literature Surveymentioning

confidence: 99%

A Review of Intelligent Control Systems for Grid Tie Doubly Fed Induction Generator Based Wind Farm

Hamdan

Youssef

Noureldeen

2023

SVU-International Journal of Engineering Sciences and Applicati

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This a review research focuses on various methods used in intelligent control systems for grid tie doubly fed induction generator (DFIG) Wind Farm. This paper reviews a controller using fuzzy coordinated PI suggested for improving the dynamic performance of supercapacitor (SC) coupled to DFIG through a buck-boost converter (DC-DC converter) during disturbances in large scale wind farm. Also, this research reviews a pitch angle control employed to regulate the angle of the wind turbine (WT) blade during different wind speeds to control power and operate WT safely. Implementation of artificial intelligent control (fuzzy approach) on pitch angle replaces the traditional control to enhance the system performance, fuzzy approach is used to auto tuning the conventional control parameters under various working conditions. Then, this paper reviews a developed control technique using an interval type-2 fuzzy logic control (FLC) tuned PI for optimum torque adjustment for WTs operated by DFIG. The suggested control regulates the error of the mechanical rotor speed and generates the optimum torque that achieves the maximum output power. On basis of the results obtained from the literature available, the integration of a SC to the dc-link of three-phase four-wire active power filter (APF) is introduced by using interfaced three level bidirectional buck-boost converter controlled by a fuzzy control approach.

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A comprehensive analysis of blade tip for vertical axis wind turbine: Aerodynamics and the tip loss effect

Miao

Liu

et al. 2022

Energy Conversion and Management

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Rationality research of the adjustment law for the blade pitch angle of H-type vertical-axis wind turbines

Cited by 9 publications

References 20 publications

Study on the Pitch Angle Effect on the Power Coefficient and Blade Fatigue Load of a Vertical Axis Wind Turbine

Study on the Pitch Angle Effect on the Power Coefficient and Blade Fatigue Load of a Vertical Axis Wind Turbine

A Review of Intelligent Control Systems for Grid Tie Doubly Fed Induction Generator Based Wind Farm

A comprehensive analysis of blade tip for vertical axis wind turbine: Aerodynamics and the tip loss effect

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