电网技术Issue(9)：2497-2503,7.DOI:10.13335/j.1000-3673.pst.2014.09.029
模块化多电平换流器的容错控制策略
A Fault-Tolerant Control Strategy of Modular Multi-Level Converters
摘要
Abstract
To analyze the operating performance of modular multi-level converter (MMC) system under the failure of sub-module, a mathematical model of MMC system during asymmetrical operation between upper-bridge arm and lower-bridge arm under active reserve mode is established, and analysis shows that under asymmetrical operation between upper-bridge arm and lower-bridge arm the fundamental frequency component in the circulating current within faulty bridge arm increases, and through changing the average switching frequency of sub-modules in the faulty bridge arm the power frequency circulating current can be suppressed. The performance of MMC system after adopting the fault-tolerant control strategy and the allowable maximum quantities of faulty sub-modules are analyzed. The correctness of the obtained conclusion is validated by PSCAD/EMTDC based on simulation results.关键词
模块化多电平换流器/热备用/容错运行/环流抑制/数学模型Key words
modular multilevel converter/active reserve/fault-tolerant/circulating current suppressing/mathematical model分类
信息技术与安全科学引用本文复制引用
江丽丽,马文忠,李林欢,孙添添,王树坤..模块化多电平换流器的容错控制策略[J].电网技术,2014,(9):2497-2503,7.基金项目
山东省自然科学基金(ZR2010EM011)。 （ZR2010EM011）
