并联混合有源滤波器复合控制策略  

Complex control strategy of parallel hybrid active power filter

作　　者：武健[1] 何娜[1] 徐殿国[1] 

机构地区：[1]哈尔滨工业大学电气工程系,黑龙江哈尔滨150001

出　　处：《电力自动化设备》2009年第3期97-100,共4页Electric Power Automation Equipment

摘　　要：将广义积分PI控制器与基于虚拟电感的指定消谐前馈控制算法结合提出了一种新的复合电流控制策略。其中,前馈控制器的基本思想是:在指定谐波频率处将有源滤波器(APF)控制成一个"虚拟电感",与无源滤波器(PF)发生串联谐振,为谐波电流提供一个低阻抗通路,动态性能良好。前馈控制对PF参数依赖性强,控制精度难以保证;而广义积分PI控制器能够无稳态误差地对特定频率谐波进行补偿,但是对于变化的负载,广义积分PI控制器需要数个周期才能实现谐波电流的精确跟踪。因此,该复合控制策略保证了混合有源滤波器(HAPF)既具有良好的动态性能又有较小的稳态误差,而且能对谐波进行分次补偿。实验结果证明所提控制策略是可行的和有效的。A complex current control strategy is put forward, which combines the generalized integral PI controller with the feedforward control algorithm of specified harmonic elimination based on virtual inductor. The basic principle of feedforward controller is： the APF is controlled as a virtual inductor at specified harmonic frequency and it resonates together with PF to provide a low impedance path for harmonic current with good dynamic performance. The feedforward controller has strong dependency on PF parameters and it is difficult to ensure the control precision. The generalized integral PI controller can compensate the specified harmonic without static error, but it needs several cycles to precisely track the harmonic current. The proposed strategy has both better dynamic performance and smaller static error, and compensates harmonic individually. Experimental results verify it is feasible and effective.

关 键 词：混合有源滤波器 广义积分 前馈控制 谐波 无源滤波器 复合控制 

分 类 号：TM77[电气工程—电力系统及自动化]