抑制间接矩阵变换器共模电压的调制策略  

Modulation strategy for suppressing the common-mode voltage of an indirect matrix converter

作　　者：马星河[1,2] 康志鹏 赵军营 潘玥[1] MA Xinghe;KANG Zhipeng;ZHAO Junying;PAN Yue(School of Electrical Engineering and Automation,Henan Polytechnic University,Jiaozuo 454003,China;Henan Key Laboratory of Intelligent Detection and Control of Coal Mine Equipment,Jiaozuo 454003,China)

机构地区：[1]河南理工大学电气工程与自动化学院,河南焦作454003 [2]河南省煤矿装备智能检测与控制重点实验室,河南焦作454003

出　　处：《电力系统保护与控制》2023年第18期1-10,共10页Power System Protection and Control

基　　金：国家自然科学基金项目资助(U1404522)。

摘　　要：间接矩阵变换器在运行过程中会产生较大的共模电压,对电机系统造成严重的电磁干扰,影响系统正常运行。针对这一问题,提出一种新的空间矢量调制策略降低共模电压大小,改善输出电压性能。首先,将整流级空间矢量重新划分区域,根据参考电流矢量所在区域选择3个相邻的有效电流矢量,将有效矢量下的平均直流母线电压维持在一个恒定值,保证整流级的最大输出电压。其次,逆变级采用无零矢量调制策略,通过使用3个有效电压矢量合成所需要的输出电压,将共模电压峰值抑制到输入相电压幅值的57.7%。与传统调制策略相比,提出的调制策略不仅可以减轻系统计算负担,还可以减少系统输入输出谐波,改善输入输出波形质量。最后,通过Matlab/Simulink和实验平台搭建相应模型,仿真和实验结果验证了所提出策略的有效性。An indirect matrix converter will generate a large common mode voltage during operation,causing serious electromagnetic interference to the motor system and affecting the normal operation of the system.To address this issue,a new space vector modulation strategy is proposed to reduce the size of the common mode voltage and improve output voltage performance.First,the space vector of the rectifier stage is re-divided into regions,and three adjacent effective current vectors are selected based on the region where the reference current vector is located.The average DC bus voltage under the effective vector is maintained at a constant value to ensure the maximum output voltage of the rectifier stage.Second,the inverter stage adopts a‘no zero vector’modulation strategy,which suppresses the common mode voltage peak to 0.577 times the input phase voltage amplitude by synthesizing the required output voltage using three effective voltage vectors.Compared with traditional modulation strategies,the proposed modulation strategy not only reduces the computational burden of the system,but also reduces input and output harmonics,improving the quality of input and output waveforms.Finally,a corresponding model is built using Matlab/Simulink and an experimental platform,and the effectiveness of the proposed strategy is verified through simulation and experiment.

关 键 词：间接矩阵变换器 共模电压 空间矢量调制 整流级 参考电压 

分 类 号：TM46[电气工程—电器]