自抗扰控制器在并联型有源滤波器中的应用

APPLICATION OF THE AUTOMATIC DISTURBANCE CONTROLLER IN THE SHUNT ACTIVE POWER FILTER

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。

This paper presents the theory and structure of ADC and its application in APF. According to the theory of ADC, the uncertainties in the model and from the circumstance outside are both considered as the unknown disturbance to the system. The expending state observer can evaluate the unknown disturbance. With the nonlinear state error feedback control law, the disturbance can be compensated. The control law has only relationship with the reference and the output. So the control is simplified with fewer variables to be detected. A good result with simulations is got through choosing and changing the parameters and the feasibility, adaptability and robustness of the control is testified by this result.