A research team led by Kim Yong San, a researcher at the Faculty of Electrical Engineering, has developed a small wind power generation system capable of ensuring maximum efficiency in low wind speed regions.
For efficiency improvement, they applied average wind speed determination method based on left truncation Weibull distribution to the design of blades of a wind turbine. As a result, the average wind speed was determined to be 4.4m/s in the region with yearly average of 3m/s and on this basis the efficiency was improved by 13%.
The system consists of a three-blade horizontal axis propeller wind turbine, a three-phase permanent magnet generator, a control device, an inverter, load and so on.
Applying this method to small wind turbines usually used in low wind speed regions, they were able to produce more electrical power from the same amount of wind.
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