计算技术与自动化2023，Vol.42Issue(4)：20-27,8.DOI:10.16339/j.cnki.jsjsyzdh.202304004
基于MMC的四端口柔性多状态开关虚拟同步裕度控制
Virtual Synchronization Margin Control for Four Terminal Flexible Multi-state Switch Based on MMC
摘要
Abstract
Flexible multi-state switch(FMSS)is a new type of power electronic equipment used in modern distribution network to replace the traditional point break switch,which can optimize the consumption and regulation of distributed pow-er generation in modern distribution network.Compared with the traditional back-to-back flexible multi-state switch,the four port flexible multi-state switch can realize flexible interconnection and power flow mutual assistance of different voltage levels and different regional networks.Taking the four port FMSS device based on the modular multilevel converter(MMC)as the research object,the virtual synchronization control(VSC)strategy is proposed to solve the problems that the conven-tional control strategy affects the frequency stability of the system and cannot provide frequency support for the weak AC power grid.This method enables the flexible multi-state switch to have inertial response characteristics and frequency modu-lation ability.On this basis,the DC voltage margin control is introduced to form an overall virtual synchronous margin con-trol,which ensures the reliable operation of FMSS in the event of DC bus voltage failure or disturbance.Finally,a four ter-minal FMSS model is built by Matlab/Simulink,and the feasibility of the proposed control strategy is verified by simulation.关键词
配电网/柔性多状态开关/模块化多电平变流器/四端口/虚拟同步控制/裕度控制Key words
distribution network/flexible multi-state switch/modular multilevel converter/four ports/virtual synchroni-zation control/margin control分类
信息技术与安全科学引用本文复制引用
魏炜,王正齐..基于MMC的四端口柔性多状态开关虚拟同步裕度控制[J].计算技术与自动化,2023,42(4):20-27,8.基金项目
江苏省高校自然科学研究项目(18KJD470004) （18KJD470004）
