电网技术Issue(5)：1291-1296,6.DOI:10.13335/j.1000-3673.pst.2014.05.025
模块化多电平换流器子模块电容电压平衡改进控制方法
An Improved Balance Control for Sub-Module Capacitor Voltage of Modular Multilevel Converter
摘要
Abstract
To decrease switching action times of sub-module and reduce converter power dissipation, an improved balance control method for sub-module capacitor voltage of modular multi-level converter (MMC) is proposed. Adopting the nearest level modulation, within each control cycle two sub-modules, which are in switching-on and switching-off conditions, are ordered respectively according to the value of capacitor voltage; based on the number of sub-modules to be put into operation and that being operated at present, the states of switching-on and switching-off sub-modules are changed; according to the preset allowable deviation of capacitor voltage and the number of substitutable sub-modules the sub-modules in switching-on and switching-off states are swapped. The effectiveness of the proposed method is validated by simulation results.关键词
模块化多电平换流器/子模块/电压平衡/开关频率/开关损耗Key words
MMC/sub-modules/voltage balancing/switching frequency/switching loss分类
信息技术与安全科学引用本文复制引用
辛业春,王朝斌,李国庆,吴学光..模块化多电平换流器子模块电容电压平衡改进控制方法[J].电网技术,2014,(5):1291-1296,6.基金项目
国家自然科学基金项目(51377016)；国家电网公司“千人计划”专项支持项目(国家电网科[2013]1111号文)。Project Supported by National Natural Science Foundation of China(51377016) （51377016）
Project Supported by “The Recruitment Program of Global Experts”Project of State Grid Corporation of China ([2013]1111) （[2013]1111）
