一种简易的三电平APF中点电位控制方法  

A Simple Three-level APF Neutral Potential Control Method

作　　者：张国胜 胡海兵[1] 夏玉政 雷少辉 ZHANG Guo-sheng;HU Hai-bing;XIA Yu-zheng;LEI Shao-hui(Nanjing University of Aeronautics and Astronautics,Nanjing 211100,China)

机构地区：[1]南京航空航天大学自动化学院,江苏南京211100

出　　处：《电力电子技术》2021年第6期122-124,共3页Power Electronics

摘　　要：中点箝位型(NPC)三电平有源电力滤波器(APF)存在直流侧中点电位不平衡的问题,常见的中点电位控制算法建模过程复杂。这里给出一种简易的控制方法,仅通过判断上、下电容电压差正负极性和中点电流方向,不仅可以实现中点平衡,还能减小开关损耗。通过仿真验证了所提控制方法的准确性和可靠性,并搭建了一台样机进行实验,实验结果证明了所提控制方法具有良好的控制效果和实用性。Neutral point calmped(NPC)three-level active power filter(APF)has the problem of neutral potential imbalance,and most of the common neutral potential control algorithms are difficult to calculate or the modeling process is complicated.A simple control method is presented,only by judging the positive and negative polarities of the voltage difference between the upper and lower capacitors and the direction of the neutral point current to achieve neutral potential control and reduce switching losses at the same time.The accuracy and reliability of the proposed control method are verified by simulation,and a prototype is built for experiments.The experimental results proved that the proposed control method has good control effects and practicability.

关 键 词：有源电力滤波器 中点箝位型 中点电位控制 

分 类 号：TN713.8[电子电信—电路与系统]