基于集值观测器的风能转换系统多类型故障检测的设计

Multi-type fault detection design of wind energy conversion systems via set-valued observer

中文关键词  延时输入  风能转换系统  集值观测器  多类型故障  故障检测

英文关键词  delayed input  wind energy conversion systems  set-valued observer  multi-type faults  fault detection

中文摘要

      针对受延时输入影响的风能转换系统的故障检测问题, 本文设计了基于集值观测器的故障检测策略. 风能 转换系统常见故障可以区分为加性故障与乘性故障, 本文对增广统一风能转换系统模型, 设计一种全局集值观测 器, 通过改变所选择的状态集顶点和参考误差区间, 改变增益矩阵元素的取值范围, 选择合适的增益矩阵, 实现精确 的状态跟踪. 在此基础上设计了同时考虑状态相对估计误差与输出的绝对估计误差的故障检测策略. 仿真结果表 明, 本文设计的故障检测策略对常见多类型故障可以做出快速的故障判断. 对比Rosa所设计的故障检测策略, 该研 究在故障检测时间上具有明显优势.

英文摘要

      The fault detection (FD) strategies based on set-valued observer (SVO) are designed in this paper to deal with the problem of FD of wind energy conversion systems (WECSs) affected by delayed input. The common faults of WECSs can be divided into additive faults and multiplicative faults. For the augmented unified model of WECS, a global SVO is designed to achieve accurate state tracking by changing the selected state sets vertexes and reference error intervals, changing the value ranges of the gain matrix elements, and selecting the appropriate gain matrix. On this basis, the fault detection strategies which considered both the relative estimation errors of state and the absolute estimation error of output are designed. The simulation results show that the designed FD strategies can offer rapid fault determination for common multi-type faults. Comparing with the FD strategies designed by Rosa, this research has obvious advantages in the time of FD.