LPV T-S fuzzy gain scheduling control of WTGS below rated wind speed

This paper studies the Linear Parameter Varying (LPV) Takagi-Sugeno (T-S) fuzzy gain scheduling control of Wind Turbine Generation System (WTGS) below rated wind speed. The T-S fuzzy linearization approach is used to deal with the Affine Nonlinear Parameter Varying (ANPV) model of WTGS and the LPV T-S fuzzy model with required accuracy is obtained. Considering the maximum utilization of wind energy and the alleviation of mechanical loads, the H_∞ problem based on the LPV T-S fuzzy system is formulated. Through introducing the parameter-dependent Piecewise Quadratic Lyapunov Functions (PQLFs), the output feedback H_∞ control synthesis procedure is proposed to treat the problem. The sufficient conditions are given in Linear Matrix Inequalities (LMIs) form. The simulation results show the effectiveness of the LPV T-S fuzzy gain scheduling control of WTGS.