CAJ | 학술논문

分析了模块化多电平换流器(modular multilevel converter，MMC)子模块在3种工作方式下的故障机制与保护方法，提出了一种在原有子模块拓扑上增加一个保护用晶闸管的新型保护策略，以快速切除故障子模块。仿真结果表明，子模块拓扑改进后，可大大提高保护效率，提升了子模块故障保护能力，可为MMC设计提供参考。
분석료모괴화다전평환류기(modular multilevel converter，MMC)자모괴재3충공작방식하적고장궤제여보호방법，제출료일충재원유자모괴탁복상증가일개보호용정갑관적신형보호책략，이쾌속절제고장자모괴。방진결과표명，자모괴탁복개진후，가대대제고보호효솔，제승료자모괴고장보호능력，가위MMC설계제공삼고。
Failure mechanism of sub-modules of modular multilevel converter (MMC) under three operating modes and corresponding approaches are analyzed, and a novel protection strategy for sub-module by adding a protective thyristor to the topology of original sub-module is proposed to fast switch-off the faulty sub-module. Simulation results show that after the improvement of the topology of sub-module, the protection efficiency can be greatly improved and the ability to protect sub-module from failure is enhanced.