三电平APF中点电位控制策略分析与改进  

Analysis and Improvement of Neutral Point Potential Control Strategy for Three-Level APF

作　　者：王海欣[1] 杨为 黄海宏[1] WANG Haixin;YANG Wei;HUANG Haihong(School of Electrical Engineering and Automation,Hefei University of Technology,Hefei 230009,China;State Grid Anhui Electric Power Research Institute,Hefei 230022,China)

机构地区：[1]合肥工业大学电气与自动化工程学院,安徽合肥230009 [2]国网安徽省电力公司电力科学研究院,安徽合肥230022

出　　处：《电器与能效管理技术》2019年第23期70-75,共6页Electrical & Energy Management Technology

基　　金：国家自然基金面上项目(51177037)

摘　　要：为了使三电平有源电力滤波器(APF)具有稳定的中点电位平衡能力和更好的谐波补偿性能,对调制波注入零序电压分量的中点电位控制方法进行了研究,指出了该方法在谐波补偿方面的不足。针对零序电压分量增加网侧电流畸变率的问题,提出了一种基于LCL三电平APF的中点电位平衡改进算法。该算法引入低通滤波器(LPF)对零序电压分量进行滤波处理,以减小其对补偿电流的影响,并给出了低通滤波器的设计参数。仿真和实验结果表明,该算法可以显著提高三电平有源电力滤波器的补偿性能,验证了该算法的可行性。In order to make the three level active power filter(APF)have a stable neutral point potential balance ability and better harmonic compensation performance,the method of neutral point potential control modulation wave injected zero-sequence voltage components was studied,the disadvantages of the method in the harmonic compensation are pointed out.In the view of the problem that the zero sequence voltage component increases the network side current distortion rate,a new algorithm for improving the neutral point potential balance based on LCL three-level APF was proposed.The low pass filter(LPF)is introduced to filter the zero sequence voltage components in order to reduce its effect on the compensation current and the design parameters of the low pass filter are given.The simulation and experimental results show that the proposed algorithm can significantly improve the compensation performance of the three-level active power filter,and verify the feasibility of the proposed algorithm.

关 键 词：三电平APF 中点电位 谐波补偿 低通滤波器 

分 类 号：TM761[电气工程—电力系统及自动化]