Dynamics Modification of Passive Pitch Control for Small-Scaled Wind Turbine

Abstract

In this research, we propose the development of passive pitch-stall control mechanism in order to prevent over-rotation of small-scaled wind power generation system. At first, we introduce the conventional dynamics which shock absorber (spring and damper) is utilized in the passive pitch-stall control for recovery of stalled pitch-angular by the centrifugal force of the blade. Secondly, we introduce the modified dynamics of passive pitch-stall control system that consider the thrust force when excessive rotation occurred. So far, dynamics of pitch angle and blade were considered as two simultaneous non-linear differential equations with stall coefficient in whole system. In this research, we could realize more significant result and will get the more precise dynamics by implementing the term of thrust force in the dynamics of blade and pitch angle.