电气传动2024，Vol.54Issue(4)：34-42,9.DOI:10.19457/j.1001-2095.dqcd25245
电网电压三相不平衡时FMSS正负序电流补偿型VSG控制
FMSS Positive and Negative Sequence Current Compensation VSG Control When Three-phase Voltage Imbalance Occurs in the Power Grid
摘要
Abstract
Flexible multi-state switch(FMSS)is a new type of power electronic device that replaces traditional tie switches and is applied to modern distribution networks.It can optimize the consumption and regulation of distributed power sources in modern distribution networks.The FMSS controlled by VSG is not affected by the deterioration of phase-locked loop performance in weak power grid environments,it can provide frequency support to the grid at low grid strength,thus enhancing the stability of the system.As a device connected to the distribution network,FMSS,when there is three-phase imbalance in the grid voltage,the output current of FMSS under traditional VSG control will become unstable,and the power will also fluctuate significantly,greatly reducing the efficiency of the grid connection point.To address this issue,based on the modular multilevel converter(MMC)structure and the traditional VSG control strategy,positive and negative sequence current compensation was introduced to achieve the stability of FMSS output current,active power,and reactive power under unbalanced power grids.Finally,a four terminal FMSS model was built using Matlab/Simulink,and the effectiveness of the proposed control strategy was verified through the simulation.关键词
不平衡电网/柔性多状态开关/模块化多电平变流器/正负序电流补偿Key words
unbalanced power grid/flexible multi-state switch(FMSS)/modular multilevel converter(MMC)/positive and negative sequence current compensation分类
信息技术与安全科学引用本文复制引用
王正齐,魏炜..电网电压三相不平衡时FMSS正负序电流补偿型VSG控制[J].电气传动,2024,54(4):34-42,9.基金项目
江苏省高校自然科学研究项目(18KJD470004) （18KJD470004）
