中国电机工程学报2024，Vol.44Issue(24)：9867-9883,中插30,18.DOI:10.13334/j.0258-8013.pcsee.231560
级联模块化中压电机驱动系统功率密度优化设计
Optimization Design of Power Density for Cascaded Modular Medium Voltage Motor Drive System
摘要
Abstract
In the application of medium voltage motor drives,the modular multilevel converter(MMC)requires large-size capacitance to mitigate ripple power in its submodule(SM),resulting in reduced power density.A high-frequency link interconnection MMC(HFL-MMC)topology is proposed,which connects the three-phase SM at the same horizontal position through a high-frequency link(HFL)and decouples ripple power based on the symmetry of fluctuating current of the three-phase SM.This effectively suppresses voltage fluctuations of the SM,greatly reducing the volume of SM capacitors.Furthermore,the 2nd-order frequency circulating currents in arms are also eliminated.This paper presents the system configuration and ripple-power decoupling principle of the HFL-MMC.The working process and mode of the interconnected high-frequency link in this topology are analyzed in detail,along with its ripple-power decoupling characteristics and zero-voltage-switching(ZVS)characteristics within conventional engineering hardware parameters.Furthermore,an evaluation is conducted on the power density,efficiency,and cost of both this topology and traditional MMC.Finally,the HFL-MMC motor drive system is verified through simulation and experimentation.关键词
电机驱动/模块化多电平换流器/功率密度/波动功率Key words
motor drive/modular multilevel converter(MMC)/power density/ripple power分类
信息技术与安全科学引用本文复制引用
刘玥良,滕甲训,赵巍,李昕,王宝诚,孙孝峰..级联模块化中压电机驱动系统功率密度优化设计[J].中国电机工程学报,2024,44(24):9867-9883,中插30,18.基金项目
河北省自然科学基金项目(E2024203258,F2022203005,E2024203170).Project Supported by Natural Science Fundation of Hebei Province(E2024203258,F2022203005,E2024203170). （E2024203258,F2022203005,E2024203170）
