基于自适应观测器的风力发电机液压变桨系统故障诊断
胡昌选，文传博
（上海电机学院 电气学院，上海 201306）
摘 要：液压变桨系统是风力发电机组中故障多发的重要部件，对其展开故障诊断具有重要意义。针对受到丢包和状态延时影响的风机变桨系统故障，提出一种基于自适应观测器的故障诊断方法。将复杂的变桨系统转化为相应的状态空间模型，并根据相应的系统故障模型设计出自适应观测器。将故障模型进行离散化之后，设置合理的系统增益矩阵以及自适应调节律，并对观测器的稳定性展开了证明。仿真结果证明了观测部分能够准确地对真实值进行跟踪，实现了对变桨系统故障诊断的目标。
关键词：风力发电机组；状态时延和丢包；变桨系统；自适应观测器；故障诊断
中图分类号：TM614 文献标识码：A 文章编号：1007-3175(2019)11-0005-06
Fault Diagnosis of Wind Turbine Hydraulic Variable Pitch System Based on Adaptive Observer
HU Chang-xuan , WEN Chuan-bo
（School of Electrical Engineering, Shanghai Dianji University, Shanghai 201306, China）
Abstract: The hydraulic variable pitch system of wind turbine is the main multi-fault component, so it is very necessary to carry out fault diagnosis. A fault diagnosis method based on adaptive observation was proposed for the fault of wind turbine variable pitch system affected by state delay and loss of package. The complex variable pitch system was transformed into the corresponding state space model, and the adaptive observer was designed according to the corresponding system fault model. After the fault model was discretized, a reasonable gain matrix and adaptive regulation law are set up, and the stability of the observer was proved. The simulation results show that the observer part can accurately track the real value and realize the goal of fault diagnosis for the variable pitch system.
Key words: wind turbine; state delay and packet loss; variable pitch system; adaptive observer; fault diagnosis
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