Abstract
Energy from wind is turning out to be a very promising alternative source technology in present and future power sector as it is environment-friendly and long-lasting with technological enhancements. Moreover, it occupies less space and has relative cost competitiveness. In the utility grid, the penetration of wind energy systems is expanding as the research progresses to capture greatest available wind power and operate the wind turbine (WT) with maximum possible aerodynamic efficiency. For this to accomplish a tracking controller is required to extract greatest wind power at all instants in the wide range of wind speeds. This paper presents a simple control technique for optimal power extraction from cut-in to rated wind speed range by sensing the dc-link power. It also embraces mathematical modeling of wind energy conversion system. The proposed algorithm shows excellent tracking capability under fluctuating wind conditions as revealed by power speed characteristic obtained in a wind energy system. The effectiveness of proposed strategy is verified by Matlab simulation
Highlights
An effective maximum power extraction strategy is called for satisfying the needs of optimal power capture and improved system aerodynamic efficiency
This paper proposes a maximum power extraction strategy modeled as: based on Hill Climb Search and Optimal Torque strategy for permanent magnet synchronous generator (PMSG) based WECS by controlling the dc link power output at the rectifier terminals
The proposed strategy have achieved the objective of extracting maximum power from any wind speed without prior knowledge of wind speed or rotor speed
Summary
Wind energy is one of the most favorable sources of sustainable energy due to its minimal environmental effect and abundant availability. These hurdles are counterbalanced by the usage of direct driven PMSG that incorporates gearbox exclusion, low speed-high torque output, eradication of ancillary excitation system or cooling system, low maintenance and operating cost, design flexibility and stable performance with power-electronic. Advanced techniques [15]-[18] get differentiated from traditional techniques by measurement of electrical parameters like voltage, current or power that are both easy, accurate and cost-effective to measure They do not need mathematical modeling of the physical system and are not affected by system parameter variations. This paper proposes a maximum power extraction strategy modeled as: based on Hill Climb Search and Optimal Torque strategy for PMSG based WECS by controlling the dc link power output at the rectifier terminals. The average output voltage of the rectifier is given by matlab Simulink model and section V concludes the article. (10)
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