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基于有源电力滤波器(APF)的端口受控哈密顿系统(PCH)平均化模型,提出了一种自适应L2增益控制新方法。该方法首先基于APF的能量耗散特性和能量平衡原理,分别建立了APF PCH平均化模型和误差系统PCH平均化模型。在此基础上设计了自适应L2增益控制律,在确保误差系统稳定的同时,实现对参数摄动和外界干扰所造成的跟踪误差的有效抑制。此外,针对准确估计直流电容参考电压波动量的困难,采用在大电容条件下忽略直流电容参考电压波动量的方法,简化了控制方法的执行过程。仿真结果验证了本文所提出方法的正确性和有效性。
Based on the port-controlled averaging model of active power filter (APF), a new adaptive L2 gain control method is proposed. Firstly, APF PCH averaging model and error PCH averaging model are established respectively based on energy dissipation characteristics and energy balance principle of APF. On the basis of this, an adaptive L2 gain control law is designed. While ensuring the stability of the error system, the tracking error caused by parameter perturbation and external disturbance can be effectively suppressed. In addition, in view of the difficulty of accurately estimating the reference voltage fluctuation of the DC capacitor, the method of ignoring the reference voltage fluctuation of the DC capacitor under the condition of large capacitance is simplified, and the implementation of the control method is simplified. The simulation results verify the correctness and validity of the proposed method.