基于PCH模型的APF非线性L_2增益控制新方法  

Novel Nonlinear L2 Gain Control Method for Active Power Filter Based on Port Controlled Hamiltonian Model

作　　者：刘会金[1] 张振环[1] 

机构地区：[1]武汉大学电气工程学院,武汉430072

出　　处：《电力系统及其自动化学报》2008年第2期9-16,共8页Proceedings of the CSU-EPSA

摘　　要：在所建立的有源电力滤波器APF(active power filter)端口受控哈密顿系统PCH(port controlledHamiltonian)平均化模型基础上,提出了一种非线性L2增益控制新方法。该方法建立了APF的PCH平均化模型,设计了L2增益控制律,针对误差系统的欠驱动性质和准确估计直流电容参考电压波动量的困难,从提高系统的鲁棒性和简化控制方法执行的角度着眼,分别采用间接控制以及大电容条件下忽略直流电容参考电压波动量的方法进行解决。此外,该方法还对采用固定反馈增益控制时APF内层控制过调制现象的产生原因进行了分析,通过设计滑动反馈增益限幅控制代替固定反馈增益控制,在满足内层控制约束下确保补偿效果。仿真结果验证了该方法的正确性和有效性。The paper proposes a novel nonlinear L2gain control method based on the averaged port controlled Hamiltonian （PCH） model of active power filter （APF）. The averaged PCH model of APF is firstly established. Then,L2 gain Control law is proposed in terms of L2 disturbance attenuation control theory. In order to deal with the underactuated property of error system and the difficulty in estimating the fluctuation of DC-side capacitor rererence voltage, indirect control and ignoring the fluctuation of DC-side capacitor reference voltage are included in the proposed method ; Furthermore, the reasons of APF input saturation are also analyzed with constant feedback gain control. According to the trade-off between control performance and APF input saturation within constant feedback gain control, Sliding feedback gain and limitation control is adopted to improve the performance of APF when input saturation limitation is satisfied. Simulation results verifies the validity of the proposed method.

关 键 词：有源电力滤波器 端口受控哈密顿系统 L2增益控制 干扰抑制 

分 类 号：TM76[电气工程—电力系统及自动化]