1. Zhao C Y, Xu J Z, Li T. DC faults ride-through capability analysis of Full-Bridge MMC-MTDC System. Sci China Tech Sci, 2013, 56: 253–261
2. Liu Z Q, Song Q, Liu W H. VSC-HVDC system based on modular multilevel converters (in Chinese). Autom Elec Power Syst, 2010, 34(2): 53–58
3. Guan M Y, Xu Z, Tu Q R, et al. Nearest level modulation for modular multilevel converters in HVDC transmission (in Chinese). Autom Elec Power Syst, 2010, 34(2): 48–52
4. Du W J, Wang H F, Cheng S J, et al. Effect of embedded voltage source converter on power system oscillation damping. Sci China Tech Sci, 2010, 53: 892–901
5. Ding G J, Ding M, Tang G F, et al. Submodule capacitance parameter and voltage balancing scheme of a new multilevel VSC modular (in Chinese). Proc CSEE, 2009, 29(30): 1–6