电网技术2017，Vol.41Issue(5)：1510-1518,9.DOI:10.13335/j.1000-3673.pst.2016.1872
适合于柔性高压直流输电系统的模块化多电平变流器的自适应均压方法
An Adaptive Voltage Balancing Method of Modular Multilevel Converter for HVDC Transmission Systems
摘要
Abstract
This paper proposes an adaptive voltage balancing method for modular multilevel converter (MMC).Different numbers of power modules are selected for alternating according to converter bridge arm currents and its derivatives in every control cycle.Analytical expression of average switching frequency is derived for the adaptive method.Effectiveness of the adaptive method and correctness of derivation of the average switching frequency are verified with simulations on a ±160 kV/400 MVA MMC system.Finally,a ±350 kV/1000 MW MMC back-to-back system is built with RT-LAB.Experimental results demonstrate that the average switching frequency can be reduced without affecting power module voltage balancing if the adaptive method is implemented.关键词
模块化多电平变流器/自适应均压方法/平均开关频率Key words
modular multilevel converter/adaptive voltage balancing method/average switching frequency分类
信息技术与安全科学引用本文复制引用
赵聪,李耀华,李子欣,王平,徐飞,王哲..适合于柔性高压直流输电系统的模块化多电平变流器的自适应均压方法[J].电网技术,2017,41(5):1510-1518,9.基金项目
国家自然科学基金青年科学基金项目(51507167).Project Supported by National Natural Science Foundation of China(51507167) （51507167）
