注入式混合型有源滤波器的电流跟踪控制

以注入式混合型有源滤波器为例,通过对其建立数学模型,提出了一种递推PI控制作为该混合型有源滤波器的电流跟踪控制算法。为有效解决递推PI控制在稳态性能、动态性能方面存在的矛盾,采用了模糊自调整机构。模糊自调整机构根据实际发出的补偿谐波电流与期望发出的补偿谐波电流之间的误差的大小以及变化趋势等特征,通过模糊推理作出相应决策,在线调整递推PI控制算法的比例系数、积分系数,从而使得系统同时具有较好的稳态、动态性能和自适应能力。相关的稳态、动态实验结果均证明了该电流跟踪控制算法的可行性和有效性。

Current tracking control of injection-type hybrid active filter

The mathematical model of injection type hybrid active power filter is built and the recursive PI(Proportional Integral) control algorithm is proposed for its current tracking,to which the fuzzy adaptive mechanism is introduced to enhance its static and dynamic performances. By fuzzy reasoning,it makes decision according to the deviation between measured and expected harmonic currents,as well as its variation rate,to online regulate the proportional and integral coefficients for achieving better static and dynamic performances and adaptive ability. Static and dynamic experiments have verified the feasibility and effectiveness of the proposed current tracking algorithm.