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。
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.
作者
胡昌选
文传博
HU Chang-xuan;WEN Chuan-bo(School of Electrical Engineering,Shanghai Dianji University,Shanghai 201306,China)
出处
《电工电气》
2019年第11期5-10,共6页
Electrotechnics Electric
基金
国家自然科学基金项目(61703103,61627810)
上海市人才发展资金项目(201511)
