Method of operation of a wind turbine which minimises the oscillations of the tower

摘要

Method of operation of a wind turbine which minimises the oscillations of the tower, using a control mechanism designed to optimise power in a speed interval V1-V2 around the critical speed Vc which produces a rotor frequency coinciding with the natural frequency of the tower in which rather than regulating the torque demanded by the generator by following an ideal motor torque vs. generator speed curve (11), it is followed a temporary regulation using a curve (13) composed of three sections (21, 23, 25) between the two curves (31, 33) of constant power P2, P1, in accordance with which: a) it is monitored continually the speed V of the generator and it is activated a counter assigning to it a value S applying to the time passed since its activation a weighting coefficient depending on the difference between V and Vc; b) the activation/deactivation of the above-mentioned temporary regulation it is done when S reaches preestablished values of Si/Sf.