Study on the influence of backlash phenomenon on wind turbine power using bond graph approach

This work presents a multi-body model for studying the influence of backlash phenomenon on wind energy using a bond graph approach. This analysis is carried out in two steps; first, the residual technique is used to discriminate between the healthy and the abnormal operating mode. The second one consists in using energy levels calculated from the spectral energy of the residual signals using a moving Hanning window to estimate the faults amplitude. Simulations tests verify the effect of the backlash magnitude on the good functioning of the wind turbine and indicate that the backlash within a certain range has little effect on the wind energy but with the enlargement of backlash, the dynamic response of the system is significantly changed.