基于混杂自动机的变速变桨风力发电系统建模与控制

Modeling and control of variable-pitch variable-speed wind turbines based on hybrid automata

为了提高风力发电机组的风能利用效率,改善输出电能质量,针对变速变桨风力发电系统的多工况运行、随机扰动大、不确定因素多、结构时变的复杂系统控制问题,给出了基于混杂自动机的控制结构,将变速变桨风力发电系统控制过程分成多个阶段。把模型信息和检测信息都分散化,结合预估控制给出各阶段控制器的算法。通过对某额定功率为1300kw的变速变桨风力机组进行建模和对控制算法进行仿真,并与常规的控制方法的控制效果进行了比较分析。仿真结果表明采用该建模和控制方法,既提高了变速变桨风力发电系统的风能的利用效率,也很好的改善了风力机输出电能质量。

In order to ensure maximum wind energy efficiency and improve the power quality of generation system＇s output, and in view of the complex control problems in variable speed and pitch wind turbines such as multiple loading conditions, random perturbation, large amount of uncertainty elements, time-varying structure and so on, this paper proposes a control model based on hybrid automata, classifying the control process of variable-pitch variable-speed wind turbines into several phases. We decentralize the model information and detection information, and present the algorithm for controllers in each phase combining with the estimate control. We make a modeling of the variable-pitch variable-speed wind turbines with 1300 kW rated power as well as a simulation of the control algorithm, then we contrast them with conventional control methods. The simulation results show that the modeling and control method can obtain a higher utilization efficiency of wind energy and a better output power quality of wind power generation system.