一种能量回收型三相电子负载重复控制策略

A Kind of Energy Recovery Type Electronic Load Repetitive Control Strategy

此处针对比例积分(PI)+重复控制的控制耦合问题提出了一种改进型的重复控制。首先利用零相位跟踪控制(ZPETC)使得输入到输出的传递函数为1,充分保证控制系统的快速性,为抑制控制耦合提供结构基础。然后对重复控制器的指令信号进行"动态延迟"处理,在动态过程中能够实现对误差的重新分配,减小重复控制器接受的误差峰值,从而抑制控制耦合,减小了回馈电流的总谐波畸变率(THD)。最后通过仿真和实验验证了所提控制策略有效性。

In order to solve the problem of control coupling, an improved repetitive control is proposed.Firstly, the zero phase error tracking control （ZPETC） is used to make sure the transfer function is 1, and the fastness of the control system is fully ensured to provide the structural basis for the suppression of control coupling.Secondly,the repetitive controller＇s instruction signal is processed by dynamic delay, the redistribution of the error can be achieved in the dynamic process, the error peak received by the repetitive controller is reduced,the control coupling is suppressed and the total harmonic distortion（THD） of the feedback current is reduced.Finally,the effectiveness of the proposed control strategy is verified by simulation and experiment.