三相四线有源电力滤波器直流侧电压控制方法

Research on DC-side Voltage Control Methods of Three-phase Four-wire Active Power Filters

针对传统直流侧电压控制方法存在超调量和静差较大的问题,提出了模糊PI控制方法,该方 法根据直流侧电压的变化情况,采用模糊控制规则对PI控制参数的初始值进行自动调整,使其在 任意时刻都能采用最适合的PI控制参数。与传统直流侧电压控制方法相比较,该控制方法具有超 调小、响应速度快、静差较小的特点。仿真结果验证了该方法的正确性。

This paper studies on DC-side voltage control of three-phase four-wire active power filters. To deal with the weakness of larger static error and overshoot about conventional DC-side voltage control methods, a fuzzy PI control method is proposed. It adopts the fuzzy rule to automatically adjust initial parameters of PI controller according to the real-time DC voltage variation. So the most suitable PI control parameters are adopted at any moment. Compared with conventional DC-side voltage control methods, the proposed fuzzy PI control method has some advantages of small overshoot, fast responses and small static error. At last, simulation is performed and the results show the validity of the proposed control method.