风能转换系统的LPV主动容错控制  

Active Fault Tolerant LPV Control of Wind Energy Conversion System

作　　者：吴定会 李意扬 纪志成 

机构地区：[1]江南大学轻工过程先进控制教育部重点实验室,江苏无锡214122

出　　处：《控制工程》2014年第5期712-717,共6页Control Engineering of China

基　　金：国家自然科学基金资助项目(61174032);江苏省产学研联合创新基金(BY2012071);中国博士后科学基金(2013M531272)

摘　　要：随着对风力机效率和可靠性要求的提高,现代风力机不再如传统风力机那样一味追求高的产能。本文针对桨距执行器故障的风能转换系统具有非线性性和参数严重不确定性,提出了基于LPV增益调度的风能转换系统的主动容错控制方法,降低故障对机组动态特性的影响。基于LPV凸分解方法,将风能转化系统非线性模型化为具有凸多面体结构LPV模型,利用LMI技术对凸多面体各个顶点分别设计满足性能要求的控制器,再利用各顶点设计的反馈控制器得到具有凸多面体结构LPV容错控制器。仿真结果表明,LPV增益调度技术可以成功地应用于风能转换系统的容错控制,在有故障的情况下,仍能保持系统的稳定和良好的动态性能。With the requirement of efficiency and requirement improving, modern wind turbines no longer blindly pursue high capacity compared to conventional one. For Wind Energy Conversion System （WECS）, as the fault of pitch actuator has nonlinear properties and uncertain parameters, an active fauh tolerant control （AFTC） method is proposed to reduce the impact to turbines＇ dynamic characteristics, which based on LPV gain scheduling technology. The linearized model around the operating point is converted into convex polyhedron structure LPV model by using LPV convex decomposition method. Then each vertex of convex polyhedron is designed to meet the required performance by using linear matrix inequalities （LMIs）. All the vertex gains are synthesized to get LPV controller with convex polyhedron structure. The simulation result shows that the LPV active fault tolerant controller can be applied to the WECS successfully. When the system is suffering a fault, it can still maintain stability and good dynamic performance.

关 键 词：风能转换系统 主动容错控制 LPV增益调度技术 凸分解 

分 类 号：TK81[动力工程及工程热物理—流体机械及工程]