一种基于PI控制器的储能变流器中点电位控制方法  

A Neutral Point Potential Control Method of Energy Storage Converter Based on PI Controller

作　　者：张纪伟 张青 ZHANG Jiwei;ZHANG Qing(School of Electronics,Electrical and Physics,Fujian University of Technology,Fuzhou 350118,Fujian,China;Fujian Xingyun Electronics Co.,Ltd.,Fuzhou 350015,Fujian,China)

机构地区：[1]福建理工大学电子电气与物理学院,福建福州350118 [2]福建星云电子股份有限公司,福建福州350015

出　　处：《电气传动自动化》2024年第1期10-14,共5页Electric Drive Automation

摘　　要：针对二极管钳位型三电平变流器拓扑固有的直流母线中点电压不平衡问题,本文分析了中点电压偏移的原因,介绍了中点电压控制的思路和传统的控制方法。针对传统PI算法控制精度不够和基于电荷守恒原理的精确控制算法计算繁琐等问题,本文提出了一种改进算法,其能有效地控制中点电位,其仿真和实验结果验证了该方法的有效性。Aiming at the DC bus neutral point voltage imbalance inherent in the topology of diode clamped threelevel converter,this paper analyzes the causes of the neutral point voltage offset,and introduces the ideas and the common control methods of the neutral point voltage control.Aiming at the problem that the control accuracy of the traditional PI algorithm is not enough and the calculation of the accurate control algorithm based on the principle of the charge conservation is cumbersome,this paper proposes an improved algorithm which can effectively control the neutral point potential.The simulation and experimental results verify the effectiveness of the proposed method.

关 键 词：三电平变流器 中点电位 PI控制 电压空间矢量调制 

分 类 号：TM464[电气工程—电器] TM72