风力发电机组的LPV H_∞控制器设计

LPV H-infinity controller design for wind power generator

针对大型风力发电机组容量增大,控制越来越复杂,特别是对机组动态稳定性要求很高这一特点,提出一种满足动态响应特性的增益调度LPV(linear parameter varying)鲁棒H∞控制器设计新方法,以解决机组的动态稳定性问题.利用LPV的凸分解方法,将风电机组线性化、模型化为具有凸多面体结构的LPV模型,利用LMI方法对凸多面体各顶点分别设计满足H∞性能和动态特性输出的反馈增益,再利用各顶点设计的反馈控制器综合得到具有凸多面体结构的LPV控制器.仿真结果表明,该控制器能有效控制风机传动系统的运行.

The capability of large wind power generator gets increased, its control becomes more and more complicated, and especially the high dynamic stability of the generator is required. Thus, a new design method for the gain scheduling LPV robust H∞ controller was proposed in order to resolve the dynamic stability problems of the generator. Using the convex decomposition method of LPV, the wind turbine model was transformed into the LPV model with convex polyhedron structure. And then using LMI method, the feedback gain to meet H∞ performance and dynamic characteristic output was designed for each vertex of the convex polyhedron. The feedback controllers designed for each vertex were synthesized to get the LPV controller with convex polyhedron structure. The simulation results show that the developed controller can efficiently control the operation of wind turbine drive system.