模块化多电平矩阵换流器的等值阻抗模型解析分析  

Equivalent impedance model analysis of modular multilevel matrix converter

作　　者：魏杰[1] 何佳伟[1] 李斌[1] 周博昊 戴魏 WEI Jie;HE Jiawei;LI Bin;ZHOU Bohao;DAI Wei(Smart Grid Key Laboratory of Ministry of Education,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学智能电网教育部重点实验室,天津300072

出　　处：《电力自动化设备》2025年第1期147-155,共9页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(52207129);国家杰出青年科学基金资助项目(52025071);天津市自然科学基金资助项目(22JCQNJC01030)。

摘　　要：模块化多电平矩阵换流器(M3C)的阻抗建模是柔性低频输电系统稳定性分析和故障特性分析的关键理论基础。介绍了M3C的拓扑结构、数学模型与控制策略。在此基础上,分析了计及M3C拓扑结构特点、dq坐标变换过程和双dq分解控制的扰动电流-桥臂电压-扰动电压传递响应特性,推导了M3C等值阻抗特性与频率的关系,建立了可用固定电阻与随频率变化电抗串联表示的M3C等值阻抗数学模型。在PSCAD/EMTDC仿真平台上利用扫频法对等值阻抗理论分析的准确性进行验证,并讨论了系统控制参数、运行功率、一次参数等不同因素对M3C阻抗频率特性的影响。The impedance modeling of modular multilevel matrix converter(M3C)is the key theoretical basis for stability and fault characteristic analysis of flexible low-frequency transmission system.The topology,mathematical model and control strategy of M3C are introduced.On this basis,considering the topology structure characteristic of M3C,dq coordinate transformation process and the double dq decoupling control,the response characteristic of disturbance current-bridge arm voltage-disturbance voltage transfer is analyzed.The relationship between the M3C equivalent impedance characteristic and frequency is derived,and the M3C equivalent impedance mathematical model is established.The accuracy of the theoretical analysis of the equivalent impedance is verified by using the frequency sweeping method on the PSCAD/EMTDC simulation platform,and the effects of different factors such as control parameters,operation power and primary parameters on the impedance-frequency characteristic of M3C are discussed.

关 键 词：模块化多电平矩阵换流器 双dq分解控制 控制响应 等值阻抗 扫频法 

分 类 号：TM46[电气工程—电器]