Maximum Peak Power Tracking-Based Control Algorithms with Stall Regulation for Optimal Wind Energy Capture

With the development of wind turbine technology, more wind turbines operate in the partial load region, where one of the main objectives is to maximize captured wind energy. This paper presents the development of an optimal control framework to maximize wind energy capture for wind turbines with limited rotor speed ranges. Numerical optimal control (NOC) techniques were applied to search for the achievable maximum power coefficient, thus maximum wind energy capture. Augmentations of these optimal techniques significantly reduced the computational cost. Simulation results show that, in comparison with the traditional torque feedback and conventional optimal control algorithms, the proposed augmented optimal control algorithm increases the harvested energy while minimizing the computational expense for speed-constrained wind turbines during partial load operation.

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Study on Recast Phenomenon in Processing of Micro-Hole with Millisecond Laser

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.459.315 ◽

2012 ◽

Vol 459 ◽

pp. 315-319 ◽

Cited By ~ 1

Author(s):

Ke Dian Wang ◽

Wen Qiang Duan ◽

Xue Song Mei ◽

Wen Jun Wang

Keyword(s):

Stainless Steel ◽

Titanium Alloy ◽

Pulse Width ◽

Peak Power ◽

Recast Layer ◽

Hole Depth ◽

Maximum Peak ◽

Blind Hole ◽

Micro Hole ◽

Millisecond Laser

The experiments of micro-hole ablation are conducted firstly on titanium alloy Ti-6Al-4V with Nd: YAG millisecond laser. A significant factor which affects the depth of blind hole is found: the depth of recast material. This paper closely examines the regularity of recast depth varying with laser parameters, discovering that the ratio of recast depth to the entire hole depth decreases as pulse width decreases, and increases as peak power decreases. Verification experiment is conducted on stainless steel 1Cr13, eventually micro-hole with very thin recast layer is drilled when the maximum peak power and the minimum pulse width of the present millisecond laser are used.

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DSP-based maximum peak power tracker using P&O algorithm

2011 IEEE Conference on Clean Energy and Technology (CET) ◽

10.1109/cet.2011.6041455 ◽

2011 ◽

Cited By ~ 6

Author(s):

Norhasniza Md Razali ◽

N.A. Rahim

Keyword(s):

Peak Power ◽

Maximum Peak

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Methodology for optimal design and control of wind energy system based on simplifying assumptions

Wind Engineering ◽

10.1177/0309524x211066772 ◽

2021 ◽

pp. 0309524X2110667

Author(s):

Souhir Tounsi

Keyword(s):

Wind Energy ◽

Energy System ◽

Chain Structure ◽

Control Algorithms ◽

Simulation Environment ◽

Wind Energy Generation ◽

Wind Energy System ◽

Simplifying Assumptions ◽

The Cost ◽

And Control

The study presented in this paper concerns the development of a new methodology for design and controlling a wind energy generation chain. This methodology is based on combined Analytical-Finite Element-Experimental method. This type of converter chosen is an AC-DC inverter with IGBTs to improve the robustness of the power chain structure. It offers a reduction of the cost of the power chain and the improvement of the performances of the global studied system, as the control at power factor equal to unity and providing an electromagnetic torque which is added to the useful torque in order to extract the maximal energy. The control algorithms permit to regulate Le charging voltage and current in their rated values considered as optimal battery charging voltage and current. The global model of the power chain is implemented under the Matlab-Sumilink simulation environment for performance and efficiency analysis.

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