| Abstract |
Thanks to scalability, performance and efficiency, the Modular Multilevel Converter (MMC), since itsinvention, becomes an attractive topology in industrial applications such as high voltage direct current(HVDC) transmission system. To control such device, the Balancing Control Algorithm (BCA) forsubmodule capacitors is a key issue. Lots of papers have been written in this field, but most of thempresent methods without showing their associated advantages and drawbacks neither comparing withprevious works. Therefore, this paper presents a comparative analysis of different BCAs based onstaircase modulation technique. The obtained results show the advantages and drawbacks for eachmethod regarding the switching frequency and the voltage ripple. Finally, some discussions andrecommendations are given for MMC sizing (submodule capacitors, converter losses) and control (BCAsampling time) users. |
