Z-域下基于快速谐波电流检测的有源滤波器设计方法  

DESIGN METHOD OF ACTIVE POWER FILTER BASED ON FAST HARMONIC CURRENT DETECTION IN Z-REGION

作　　者：潘国兵[1] 郑智超 汤文轩[1] 王坚锋[1] 何铁锋 Pan Guobing;Zheng Zhichao;Tang Wenxuan;Wang Jianfeng;He Tiefeng(Instiute of Distributed Energy and Microgrid,Zhejiang Universiy of Technology,Hangzhou 310014,China)

机构地区：[1]浙江工业大学分布式能源与微网研究所,杭州310014

出　　处：《太阳能学报》2020年第6期196-203,共8页Acta Energiae Solaris Sinica

基　　金：国家国际科技合作专项(2014DFE60020);浙江省自然科学基金(LY15E070004);浙江省重点研发计划项目(2018C01081)。

摘　　要：为提高有源滤波器(active power filter,APF)的动态响应和补偿性能,提出一种Z-域下基于快速谐波电流检测的控制策略。谐波电流检测环节采用特定次谐波陷波器和低通滤波器的组合滤波器,特定次谐波陷波器滤除低次谐波,低通滤波器频带较宽,滤除高次谐波,可有效解决传统滤波器的带宽和响应时间上的矛盾。电流控制环在基波dq同步旋转坐标系下,将基波电流与谐波电流分开控制,谐波电流采用矢量谐振控制器,并在离散域下进行参数设计,可避免数字化过程中引入的偏差。通过仿真和实验结果验证该方法能够快速分离谐波电流,在负载波动时能保持直流侧电压稳定并实现较好的补偿效果。Aiming to improve the performance of dynamic response and compensation of active power filter(APF),a control strategy based on fast harmonic current detection in Z-region was presented.A combined filter with a specific harmonic notch filter and a low-pass filter is adopted for harmonic current detection.The low harmonics are filtered out by the specific harmonic notch filter,and the high harmonics are filtered by the low-pass filter as its wide band.This kind of combined filter effectively solves the contradiction between bandwidth and response time of traditional filter.In the basewave dq synchronous rotation coordinate,the current control loop separates the fundamental current control from the harmonic current,and the harmonic current is controlled by a vector resonant controller,and the parameters are designed in the discrete domain to avoid the deviation introduced in the digital process.The simulation and experimental results show that the method can quickly separate harmonic currents,and maintain DC voltage stability when load fluctuating,and achieve better compensation.

关 键 词：有源滤波器 陷波器 数字化 矢量谐振控制 

分 类 号：TM464[电气工程—电器]