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详细介绍了自抗扰控制器的原理与结构 ,并将其应用在并联型有源电力滤波器中。根据自抗扰控制器的原理 ,文中将系统内部模型的不确定性与系统的外部不确定性统一视为系统的未知干扰 ,通过扩张状态观测器来估计 ,然后利用非线性反馈控制律进行补偿 ,使系统的控制律仅与系统的给定输入和输出有关 ,减少了控制过程中的检测量 ,将复杂的控制过程加以简化。通过参数的选取 ,在系统的仿真中获得了良好的控制效果 ,证明了控制策略的可行性 ,同时通过参数的改变 ,验证了该控制方法具有很强的适应性和鲁棒性。
The principle and structure of ADRC controller are introduced in detail and applied in parallel active power filter. According to the principle of ADRC, the unification of system internal model uncertainty and system external uncertainty is regarded as the unknowing interference of the system, which is estimated by dilatational state observer and then compensated by nonlinear feedback control law , The control law of the system is only related to the given input and output of the system, which reduces the detection volume in the control process and simplifies the complicated control process. Through the selection of the parameters, good control effects are obtained in the simulation of the system, and the feasibility of the control strategy is proved. At the same time, it is verified that the control method has strong adaptability and robustness through the parameter changes.