混合型有源滤波器直流侧电压的稳定控制

分析了一种并联混合型有源滤波器系统中直流侧电压波动的原因，针对直流侧电压的波动对系统性能影响，提出了采用模糊-PI控制器来保证直流侧电压的稳定以提高系统整体性能的方法，并给出了具体获得系统参考信号的实现方法。这种控制直流侧电压稳定的方法有较强的处理非线性和不确定性过程的能力，且算法简单，不需要增加复杂硬件，是一种经济的解决措施。实验结果证明了该方法的有效性。

Stable Voltage Control at DC-side of Hybrid Active Power Filter

The causes of DC-side voltage ripple in a shunt hybrid active power filter are analyzed. Aiming at the effects of the voltage ripple on system performance, the method to ensure stability of the voltage at DC-side and to improve overall performance of system is put forward by using fuzzy-PI controller. The concrete realizing method of gaining systematic reference signals is provided. This controlling method offers high capability of dealing with nonlinear and undetenninistic process. It features simple algorithm, no extra complex hardware needed, and is an economical solution. Experimental results have testified the validity of this method.