并联型重复控制器在谐波电流源中的应用

Application of Parallel Repetitive Controller in Harmonic Current Source

谐波电流功率电源要求输出电流准确地跟踪指令信号。为实现该控制目标,在电流比例反馈闭环基础上引入重复控制策略,提高了输出谐波频率处的系统开环增益,实现大幅提高输出电流跟踪精度的目的。同时,通过分析控制参数对稳定性和稳态误差的影响,得到了控制参数的设计准则,最后,给出一套重复控制参数设计方法。该设计方法在仿真和实验中得到了较好的验证。

Harmonic current source requires the output current accurately ibllowing the signal ot the mstructton, to achieve this control goal, this paper chooses the proportion control as the basic feedback control method, and from in- troducing the repetitive control structure, the open loop gain of control system at harmonic frequency increases signifi- candy,hence,the system can achieve the goal of high accurately following of the output current.At the same time, From analyzing stability and accuracy of the proposed structure with different control parameters, the principle of the parameter of repetitive control is summarized,then,a set of the design method is proposed.Finally,this paper takes some simulation and experiment to verify the effects of the design method.