风能转换系统执行器故障重构与容错控制

Actuator fault reconstruction and fault-tolerant control of wind energy conversion system

针对风能转换系统中执行器故障,论文提出了一种新型的主动容错控制策略.设计滑模故障观测器,实时动态采集执行器故障前后数据信息,对执行器故障进行重构,达到故障诊断的目的.通过补偿控制,保证了滑模控制器对风能转换系统的可靠控制输入,以达到对执行器故障主动容错的功能.仿真结果表明,滑模故障观测器模块能够实时精确地重构风能转换系统执行器故障,主动补偿容错控制器在不影响风能转换系统动态性能的情况下,仍能实现系统的最大风能的捕获.

A novel active fault tolerant control strategy is proposed for the actuator fault in wind energy conversion sys- tem （WECS）. By collecting the real-time status of the actuator faulty and normal conditions, a sliding mode fault observer is designed, then the actuator fault is reconstructed, which realizing the fault detection. Depending on the reconstructed fault, a compensation to the sliding mode controller is provided, so the reliable control to WECS can be guaranteed, therefore, the actuator active fault tolerant function is realized. Some simulation experiments are carried out. The results show that actuator fault for WECS can accurately reconstructed by the sliding mode fault observer, under the condition of not affect- ing the dynamic performance of WECS, the maximum wind energy capture still can be achieved by active compensation fault-tolerant controller.