一种新型有源滤波器网侧电流双闭环控制方法  

A Novel Grid Side Current Double Closed-loop Control Strategy of Active Power Filter

作　　者：王坚锋[1] 胥芳[1] 潘国兵[1] 欧阳康 WANG Jian-feng;XU Fang;PAN Guo-bing;OUYANG Kang(Institute of Distributed Energy and Microgrid,Zhejiang University of Technology,Hangzhou 310023,China)

机构地区：[1]浙江工业大学,分布式能源与微网研究所,浙江杭州310023

出　　处：《电力电子技术》2020年第5期43-46,共4页Power Electronics

基　　金：国家重点研发计划(2017YFA0700301)。

摘　　要：并联型有源电力滤波器(SAPF)网侧电流反馈控制属于闭环控制,其性能优于负载侧电流反馈控制。传统网侧电流反馈控制采用低通滤波器检测谐波电流,动态响应速度慢。为提高有源滤波器的动态响应特性,这里提出一种新型的网侧闭环控制方法,采用基波和谐波电流独立的双闭环控制结构,无需谐波检测环节。结合频率特性分析了新方法在暂态响应、稳定性和控制精度等方面的提升作用,为提高模型的精确度,对系统进行离散化设计。通过对比性的样机实验证实了新方法的有效性。The shunt active power filter(SAPF)based on grid side current feedback control is better than load current feedback control.Typical grid side current feedback control methods use low pass filter to extract harmonics,which will cause the transient response slowly.In order to improve the transient response of the system,a grid side current closed-loop control strategy without low pass filter is proposed,and the fundamental and harmonics current controller are independent of each other in double closed-loop structure.The harmonics control loop with vector resonant controller could compensate the phase lag caused by the filter inductor.Frequency phase characteristics are used for analysing the improvement of transient response,stability and precision.Discrete model is built for the accurate control.The contrast experiment confirmes the advancement of the proposed method.

关 键 词：并联型有源电力滤波器 反馈控制 动态响应 闭环控制 

分 类 号：TN713.8[电子电信—电路与系统]