单相并联型有源滤波器的鲁棒电流控制方法

有源滤波器与无源滤波器相比有很多优点,是消除或限制电力系统谐波污染的一种有效措 施。电流环的控制是有源滤波器控制的关键部分。传统的并联型有源滤波器需要对多个电流进行 采样,文中提出一种仅采样电源电流的新方法。考虑到对瞬时电流控制时容易引入噪声,影响系统 的稳定性,文中在无差拍控制的基础上,提出了采用可复位积分器作为输入滤波器的平均电流控制 方法,该方法对参数的变化和采样噪声及周期噪声都有很强的鲁棒性。仿真和实验证实了该方法 的有效性。

A Robust Current Control Method for Single Phase Parallel Active Power Filter

Active power filter has many advantages as compared to passive power filter. It is an efficient measure to eliminate or limit the harmonic pollution in power system. The control of current loop is the key part for the control of active power filter. Traditional active power filter needs to sample more than one current. A new control method that only samples the source current is presented in this paper. Since the control to instant current will bring noises into control, which affect the stability of system, a robust average current control method based on deadbeat control is proposed. In average current control a resetting integrator is used as input filter. This method is robust to parameter changes, sampling noise and periodic noise. The simulation and experiment results both verify the validity of the proposed current control method.