并联有源滤波器的改进重复控制策略研究  

Research on Improved Repetitive Control Strategy for Shunt Active Power Filter

作　　者：房俊龙[1] 甄景龙 马文川[1] 魏东辉[1] 汪光亚 张维华 FANG Junlong;ZHEN Jinglong;MA Wenchuan;WEI Donghui;WANG Guangya;ZHANG Weihua(School of Electrical and Information,Northeast Agricultural University,Harbin 150030,China)

机构地区：[1]东北农业大学电气与信息学院,哈尔滨150030

出　　处：《电力系统及其自动化学报》2020年第2期133-139,共7页Proceedings of the CSU-EPSA

摘　　要：针对三相整流负载产生的6k±1次谐波,提出静止坐标系下的改进型6k±1重复控制策略。同时将比例控制与改进型重复控制相结合,设计改进重复控制并联比例的复合控制结构。为减小改进重复控制中延时环节不为整数的影响,采用基于Lagrange插值近似的FIR滤波器逼近分数延时特性。最后对系统进行稳定性分析和详细设计方法进行推导。通过Matlab仿真验证改进重复控制策略能有效跟踪6k±1次谐波且具有良好的补偿效果,动态响应较快。For the(6k±1)th harmonics generated by a three-phase rectified load,an improved repetitive control strate?gy under the stationary coordinate system is proposed in this paper.At the same time,proportional control and im?proved repetitive control are combined to design a composite control structure with an improved repetitive control paral?lel ratio.To reduce the influences due to the delay link in the improved repetitive control being not an integer,the La?grange interpolation approximation-based FIR filter approximation fractional delay characteristic is introduced.Finally,the stability analysis of the system and its detailed design method are deduced.MATLAB simulations prove that the im?proved repetitive control strategy can effectively track the(6k±1)th harmonics,with a satisfying compensation effect and faster dynamic response.

关 键 词：分数延时 重复控制 稳定性 内模原理 有源滤波器 

分 类 号：TM761[电气工程—电力系统及自动化]