LPV H-infinity Controller Design for Variable-Pitch Variable-speed Wind Turbine

A new approach to design LPV robust gain scheduling controllers for a variable pitch variable speed wind turbine drive system is presented. The time-varying nonlinear model of the wind turbine is translated into a linear parameter varying (LPV) system with convex polyhedron version via the LPV convex decomposition technique. State feedback controller satisfying H-infinity performance at every vertex of convex polyhedron parameter space can be numerically solved via linear matrix inequalities (LMI) approach. Using these designed controllers at every vertex, a LPV controller with smaller on-line calculating capacity is synthesized via convex decomposition techniques. Simulation results show better tracking performances and disturbance rejection abilities of the proposed controller than.