Abstract: To overcome the impact of randomness of wind speed on dynamic characteristics of wind turbines system, a dynamic robust control method is used to compensate the uncertainty and external disturbance for the electro-hydraulic proportional differential variable-pitch system of wind turbines. Primarily, a mathematical model for wind turbines system was constructed in accordance with the process of electro-hydraulic proportional differential feathering. On this basis, a dynamic robust control system for wind turbines was proposed combined with a dynamic robust compensation controller. Furthermore, a simulation model of the given control system in the process of feathering was established by utilizing MATLAB/Simulink module. Under the condition of different wind speed signals, simulated and analyzed the control system in two cases that it contained and didn’t contain dynamic robust compensation controller. Finally, the response characteristic curves corresponded with given wind speed signals can be obtained. The simulation results indicate that the dynamic response of the proposed control system, which contains a dynamic robust compensation controller, is little influenced by different wind speed signals. Thus, under the application of dynamic robust compensation controller, the stability and robustness for variable-pitch control of the wind turbines are improved.

Key words: Wind turbines, electro-hydraulic proportional, differential feathering, dynamic robust compensation control, MATLAB/Simulink, random strong wind disturbance

摘要： 为克服风速的随机性对风电机组系统动态特性的影响，采用动态鲁棒控制方法对风电机组电液比例差动变桨系统的不确定性和外在干扰进行补偿。首先针对风电机组电液比例差动顺桨过程建立了系统数学模型，在此基础上加入动态鲁棒补偿控制器，构成风电机组动态鲁棒控制系统，然后利用MATLAB/Simulink模块建立控制系统顺桨仿真模型，输入不同的风速信号分别对有无动态鲁棒补偿控制器的控制系统进行仿真分析，得到不同风速信号相对应的系统响应特性曲线。仿真结果分析表明，不同的风速信号对含动态鲁棒补偿控制器的控制系统动态响应的影响很小，系统加入动态鲁棒补偿控制器后，显著提高了风电机组变桨控制的稳定性和鲁棒性。

关键词: 风电机组, 电液比例, 差动顺桨, 动态鲁棒补偿控制, MATLAB/Simulink, 随机强风干扰