电气传动2026，Vol.56Issue(3)：10-18,9.DOI:10.19457/j.1001-2095.dqcd26577
一种基于九桥臂MMC的混合多频率变流器
A Hybrid Multi-frequencies Converter Based on 9A-MMC
摘要
Abstract
Aiming at the interconnections requirements of power frequency(PF),low frequency(LF)and direct current(DC)brought by the offshore wind power,a hybrid multi-frequency converter was designed based on the nine-bridge-arm modular multilevel converter(9A-MMC),in which the diode-clamp sub-module was selected for upper and lower bridge-arm,and the cross-connected-double sub-module was selected for intermediate bridge-arm.The converter had fewer components than the existed hybrid 9A-MMC with the ability of blocking DC fault,and its middle arms could output a negative voltage without controlling the current direction.An improved modulation method was designed for the intermediate bridge-arm module to effectively reduce harmonics.The simulation results show that the proposed hybrid 9A-MMC could simultaneously convert PF AC and LF AC into DC,with a low harmonic distortion rate and small DC-side voltage ripple,which is of certain significance for engineering.关键词
九桥臂模块化多电平变换器/混合模块化多电平变换器/直流故障阻断/多端口/海上风电Key words
nine-bridge-arm modular multilevel converter(9A-MMC)/hybrid modular multilevel converter/DC fault blocking/multi-terminal/offshore wind power分类
信息技术与安全科学引用本文复制引用
严颖诗,丘东元..一种基于九桥臂MMC的混合多频率变流器[J].电气传动,2026,56(3):10-18,9.基金项目
企业创新发展联合基金重点项目(U24B20101) （U24B20101）
