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为研究滑模变结构控制策略在提升双馈风力发电系统运行性能上的作用,提出一种基于指数趋近律的滑模变结构控制策略,分析计算了不同控制对象的控制率,在所建立的双馈风力发电系统Simulink仿真模型上对滑模变结构控制在双PWM(pulse width modulation)变换器控制、MPPT(maximum power point tracking)控制和空载并网控制上的应用进行系统性研究,并和PI控制方法进行对比,结果表明所提出的滑模变结构控制策略不仅简化了控制结构,而且提高了系统的响应速度、控制精度和鲁棒性,具有一定的有效性和可行性。
Abstract：In order to study the improvement of system performance when the sliding mode variable structure control strategies are used in the doubly-fed induction generation(DFIG)system,a sliding mode variable structure control strategy is proposed based on exponential reaching law.The control rate of different control objects is analyzed and calculated,and based on the simulation model of DFIG built in Simulink,the applications of variable structure control to the dual-pulse width modulation(PWM)converter control,maximum power point tracking(MPPT)control and noload grid-connected control are studied systematically.Compared with the proportional-integral(PI)control method,the simulation result shows that the proposed sliding mode variable structure control strategies not only simplify the control structure,but also improve the response speed,control precision and robustness of the system,indicating their effectiveness and feasibility.
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基本信息:
中图分类号:TM614
引用信息:
[1]李培强,邱时严,李欣然,等.双馈风力发电系统的滑模变结构控制技术[J],2017,29(08):29-35.
基金信息:
国家自然科学基金资助项目(51277055)