Speed Control of a Wind Turbine System Based on Pitch Control

피치제어형 풍력발전시스템의 속도제어

  • Lim, Jong-Hwan (Dept.of Mechanical Energy Production Engineering, Cheju National University) ;
  • Huh, Jong-Chul (Dept.of Mechanical Energy Production Engineering, Cheju National University)
  • 임종환 (제주대학교 기계에너지생산공학부) ;
  • 허종철 (제주대학교 기계에너지생산공학부)
  • Published : 2001.02.01

Abstract

The paper presents a speed control algorithm for a full pitch-controlled wind turbine system. Torque of a blade generated by wind energy is a nonlinear function of wind speed, angular velocity, and pitch angle of the blade. The design of the controller, in general, is performed by linearizing the torque in the vicinity of the operating point assuming the angular velocity of the blade is constant. For speed control, however the angular velocity is on longer a constant, so that linearization of the torque in terms of wind speed and pitch angle is impossible. In this study, a reference pitch model is derived in terms of a wind speed, angular velocity, and pitch angle, which makes it possible to design a controller without linearizing the nonlinear torque model of the blade. This paper also suggests a method of designing a hydraulic control system for changing the pitch angle of the blade.

Keywords

References

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