江西水利电力大学学报2026，Vol.45Issue(1)：59-65,7.
基于SOGI谐波提取的PIR+虚拟阻抗MMC-HVDC环流抑制策略
Circulating current suppression strategy for MMC-HVDC based on SOGI harmonic extraction and PIR+virtual impedance
摘要
Abstract
Harmonics in the circulating current of Modular Multilevel Converters(MMC)can affect the power transmission quality of Voltage-Sourced Converter High-Voltage Direct Current(VSC-HVDC)systems.To improve MMC performance,a circulating current suppression strategy using an improved Quasi-Resonant(QR)controller combined with virtual impedance is proposed to reduce the harmonic content in the circulating current,specifically targeting the second-order and higher-order harmonics.First,the mechanism of circulating current generation is analyzed.Then a multi-harmonic filter based on the Sec-ond-Order Generalized Integrator(SOGI)is designed to extract multiple harmonics from the circulating current in response to the problem of accuracy in multiple harmonic extraction.By integrating proportional-integral adjustment into the improved QR control,a Quasi-Proportional Integral Resonant(PIR)controller is obtained to suppress the second-order harmonic,while virtual impedance is introduced to suppress higher-order harmonics.Finally,a simulation model of the MMC-HVDC system was developed,and comparative simulation analysis validated the effectiveness of the proposed circulating current suppres-sion strategy.关键词
模块化多电平换流器/柔直系统/环流抑制/广义二阶积分器/虚拟阻抗Key words
MMC/VSC-HVDC/circulating current suppression/second order generalized integrator/virtual impedance分类
信息技术与安全科学引用本文复制引用
翁帅,徐晓伟,向玉鹏,陈湘秦,杨小品,王翠,寇桂岳..基于SOGI谐波提取的PIR+虚拟阻抗MMC-HVDC环流抑制策略[J].江西水利电力大学学报,2026,45(1):59-65,7.基金项目
江西省教育厅科学技术研究项目(GJJ211918) （GJJ211918）
江西省自然科学基金重点项目(20224ACB204016) （20224ACB204016）
江西省大学生创新创业训练计划(S202511319010) （S202511319010）
