LPV H-infinity Controller Design for a Wind Power Generator

There are many control methods of wind power generator set, and various control technology has successful applied cases,however, with the content augment of set, we need to improve dynamic stability. The routine traditional control technology (for example PID control) can’t satisfy the requirements now. Aiming at the particularity of wind power generator set, the paper puts forward a new gain scheduling LPV robust H∞ controller design method. The method places closedloop poles into the field satisfying dynamic response in order to solve the problem that the routine PID control can’t solve. Take use of LPV convex decomposition method, transform wind turbine model into convex polyhedron structure LPV model, and then by using LMI method design to meet H∞ performance and closed-loop pole placement feedback gain for each vertex of convex polyhedron. Synthesize each vertex feedback gain to get LPV controller with convex polyhedron structure. The result of simulation validates that the controller has well control performance. Keywords—wind power generator, LPV(linear parameter varying), H∞(H-infinity)control, convex decomposition, LMI(linear matrix inequalities)