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http://dx.doi.org/10.7836/kses.2012.32.5.031

Control System Design of NREL 5MW Wind Turbine  

Nam, Yoonsu (Dept. of Mechanical and Mechatronics, Kangwon National University)
Im, Changhee (Dept. of Mechanical and Mechatronics, Graduate School, Kangwon National University)
Publication Information
Journal of the Korean Solar Energy Society / v.32, no.5, 2012 , pp. 31-40 More about this Journal
Abstract
This paper introduces a methodology for NREL 5MW wind turbine, which is the variable speed and variable pitch(VSVP) control system. This control strategy maximizes the power extraction capability from the wind in the low wind speed region and regulates the wind turbine power as the rated one for the high wind speed region. Also, pitch control efficiency is raised by using pitch scheduling.Torque schedule is made of torque table depending on the rotor speed. Torque control is used for vertical region in a torque-rotor speed chart. In addition to these, mechanical loads reduction using a drive train damper and exclusion zone on a torque schedule is tried. The NREL 5MW wind turbine control strategy is comprised by the generator torque and blade pitch control. Finally, proposed control system is verified through GH Bladed simulation.
Keywords
Wind Turbine; Torque control; Exclusion zone; Tower loads; Pitch control; Load reduction; Drive train damper;
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