基于虚拟传感器的风力机LPV容错控制  

LPV Fault Tolerant Control of Wind Turbines Based on Virtual Sensor

作　　者：宋锦 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：《信息与控制》2015年第4期474-480,486,共8页Information and Control

基　　金：国家自然科学基金资助项目(61174032;61203092;61572237);江苏省"六大人才高峰"(WLW-008)

摘　　要：针对风力机中桨距角传感器故障导致的发电机速度波动问题,提出了基于虚拟传感器的主动容错控制方法.利用线性变参数(linear parameter varying,LPV)凸分解技术,将风力机的非线性模型转化为LPV模型.通过判断输出矩阵的行秩条件,确定虚拟传感器结构,同时根据分离原则,独立求解线性矩阵不等式获得LPV虚拟传感器和容错控制器.仿真结果表明,该方法可以处理桨距角传感器的偏差和失效故障,保证发电机速度稳定和恒功率输出.To address the generator speed fluctuation caused by failures of pitch angle sensors in wind turbines, we pro- pose an active fault-tolerant control method based on a virtual sensor. The nonlinear model of wind turbines is con- verted into the linear parameter varying （LPV） model according to the LPV convex decomposition method. In addi- tion, the structure of the virtual sensor is deterroined by the low rank condition of the output matrix. Simultaneous- ly, the virtual sensor and the controller are obtained by solving linear matrix inequalities independently according to the principle of separation. The simulation results show that this method can compensate for the deviation and fail- ure of a pitch angle sensor and can also maintain a stable generator speed and constant power output.

关 键 词：容错控制 风力机 线性变参数 虚拟传感器 线性矩阵不等式 

分 类 号：TK81[动力工程及工程热物理—流体机械及工程]