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中文摘要：
针对变速变桨风力机实际工况下同时存在外界输入噪声及内部测量噪声的问题,采用线性二次型/回路传输恢复（Linear quadratic Gauss/loop transfer recovery,LQG/LTR）方法设计改善某风力机叶轮转速及塔架前后弯曲模态的控制器,增强风力机系统在随机干扰下的鲁棒性能。根据风力机空气动力学的圆盘理论和叶素理论,求解风力机受到的扭矩和推力。基于变速变桨风力机的线化模型,分别进行LQG和LQG/LTR控制器设计,分别仿真输出风力机的叶轮转速、塔架塔顶位移和桨距角时间变化曲线。仿真结果表明,LQG/LTR控制器在满足系统控制目标的情况下,可显著提高风力机系统的鲁棒性能及稳定性。
英文摘要：
For the external input noise and internal measurement noise of the variable-speed variable-pitch wind turbine under practical conditions,the linear quadratic Gauss/loop transfer recovery（LQG/LTR） controller is designed to improve the wind turbine rotor speed and the tower fore-aft bending mode and to enhance the wind turbine system robustness under random disturbances.According to the disc and blade element theory of the wind turbine aerodynamics,the wind turbine torque and thrust are solved.Based on the linear model of the variable-speed variable-pitch wind turbine,the LQG and LQG/LTR controllers are designed respectively.The time curve of wind turbine rotor speed,tower displacement and pitch angle are simulated.Results show that the LQG/LTR controller can significantly improve the wind turbine system robustness and stability while achieving control objectives.
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