改进PR控制器在四桥臂有源滤波装置中的设计与实现  

The Design and Realization of the Improved PR Controller in the Four-leg Active Power Filter

作　　者：孟鑫[1] 张勇[1] 周娟[1] 

机构地区：[1]中国矿业大学信息与电气工程学院,江苏徐州221008

出　　处：《电测与仪表》2012年第9期85-90,共6页Electrical Measurement & Instrumentation

摘　　要：四桥臂有源电力滤波器(APF)的电流环控制采用改进的比例谐振(PR)控制器,采用DSP数字实现时需将PR控制器离散化。本文详细论述了采用不同离散化方法的数字PR控制器的频率特性,预修正的突斯汀变换和零极点匹配法无论在低频还是在高频都不会造成谐振频率偏移,该结果表明这两种方法适应于APF补偿电流的跟踪控制。将采用预修正的突斯汀变换和零极点匹配法实现的数字PR控制器用于四桥臂APF电流环的跟踪控制,仿真和实验结果验证了这两种方法的可行性,且采用预修正的突斯汀变换法的补偿效果优于零极点匹配法。The current loop control of four-leg active power filter （APF） uses the improved Proportion Resonance （PR） controller. When it is achieved by the DSP, we need to disperse the controller. This paper analyzes different discrete methods and their frequency characteristic curve of the discreted PR controller, the pre-tustin and matched pole-zero method have better tracking performance whether it is in the low frequency or high frequency. The results show that these two methods adapt to compensate the current of the APF＇s tracking control. We use the digital PR controller respectively achieved by the pre-tustin and the matched pole-zero method for tracking control of the four leg APF＇s current loop. The simulation and experimental results verify the feasibility of these two methods, and the pre tustin is better than the pole-zero matching method.

关 键 词：四桥臂有源电力滤波器 比例谐振控制器 离散化 

分 类 号：TM933[电气工程—电力电子与电力传动]