一种改进的有源滤波器电流跟踪控制策略  

Current tracking control scheme for active power filter based on improved double hysteresis SVPWM

作　　者：于槟华 龚仁喜[1] 郭柏佑 汪洋[1] 肖助力[1] 

机构地区：[1]广西大学电气工程学院,南宁530004 [2]台湾云林科技大学工程学院,台湾云林64002

出　　处：《电测与仪表》2015年第24期74-79,共6页Electrical Measurement & Instrumentation

基　　金：南宁市科学研究与技术开发计划课题(20121025)

摘　　要：针对电力有源滤波器传统双滞环控制策略在电流误差超出外环的情况下补偿电流不能及时跟踪指令电流的问题,提出了一种电压空间矢量双滞环电流跟踪控制的新方法。该方法通过使用模糊控制器在线动态调节外环滞环比较器的环宽,从而达到有效降低高次谐波分量的目的。该控制策略相比于传统双滞环控制策略,在有效降低高次谐波分量的同时,降低了开关损耗,提高了跟踪精度,增强了鲁棒性,改善了滤波器的性能。仿真结果证明了其可行性和有效性。Aiming at the problems about which the compensating current can not track the instruction current in the active power filter under the condition with the current error outside the outer loop in the conditional double hysteresis control method,a new method for voltage space vector and double hysteresis current tracking control is proposed. The loop width of the outer hysteresis comparator is dynamically adjusted online by utilizing a fuzzy controller,thus reducing the high-order harmonic components effectively. Compared with the traditional double hysteresis control method,the proposed method can reduce the high-order harmonic components and switching frequency more effectively,which improves tracking precision,enhances the robustness and raises the efficiency of APF remarkably. The simulation results verify the feasibility and effectiveness of the proposed method.

关 键 词：有源电力滤波器 跟踪控制 电压空间矢量 双滞环电流控制 模糊阈值 

分 类 号：TM761[电气工程—电力系统及自动化]