摘要
针对非线性的风电系统,设计了基于耗散系统理论框架的L2范数优化鲁棒速度控制器,能够有效地提高系统的鲁棒性和快速性,但是不断变化的气动转矩限制了其实际应用。为了克服气动转矩突变对风电系统的不良影响,设计了一个自适应的转矩观测器,在线辨识系统转动惯量,进行精确的前馈补偿,从而大大提高了系统的抗干扰能力。以1.5 MW直驱永磁风电机组作为研究对象,进行了仿真和实验研究,结果表明该控制策略可以实现快速的风速跟踪,并且对于干扰具有较强的鲁棒性。
For the nonlinear characteristic of wind power system, a L2 norm optimal robust speed controller based on dissipative system theory framework was designed, which effectively improve system robustness and response. However, the practical application of this algorithm is greatly restrained by changing aerodynamic torque.Therefore, a torque observer was designed to overcome bad effect of aerodynamic torque variation.To ensure the accuracy of torque observer, the rotational inertia that have been identified online is used to update the parameters of the observer, which can greatly improve ability to resistance disturbances of the system. Being 1.5 MW direct-driven permanent-magnet wind turbine as an research object, the results of simulation and experiment show that this control strategy can achieve rapid wind speed tracing, and had strong robustness for unknown disturbances of wind speed fluctuation.
出处
《电气传动》
北大核心
2013年第9期48-51,共4页
Electric Drive
基金
国家自然科学基金资助项目(51207095)
