基于零处理的联合式风力机LPV容错控制器设计

Design of LPV Fault Tolerant Controller for Wind Turbine Based on Combined Zero-process

针对风力机系统多个桨距角传感器故障问题,提出基于零处理的联合式双层凸多面体(Linear Parameter Varying,LPV)容错控制器设计方法。首先通过对传统的风力机LPV模型的凸多面体顶点进行优化,构建出双层LPV模型,然后利用联合式的思想以及零处理的方法逐一设计各个子控制器,将各个子控制器凸结合得到最终控制器。该设计方法鲜明简洁,减小了模型的线性化偏差,解决了风力机系统多个桨距角故障的容错控制问题,保障了风力机的稳定运行。

A fault tolerant method of combined double-layer convex polyhedron linear parameter varying(LPV)based on the zero processing is proposed in addressing the problem of pitch-angle sensors malfunction.The traditional LPV model is convert to the double-layer LPV model by optimizing its convex polyhedron vertices at first.Then,the combined thinking and zero processing are employed to design each sub-controller of the system,and the final controller is obtained from the combination of these sub-controllers.This approach solves the fault-tolerant control problem of pitch angles malfunction with reducing the linear deviation of LPV model in a concise way,which guarantees the stable operation of the wind turbine.