Additional-levels-based control method for modular multilevel converters with reduced DC-link current ripple

• Main Authors: Yu, Qiang, Deng, Fujin, Tang, Yi, Wang, Yanbo, Blaabjerg, Frede
• Other Authors: School of Electrical and Electronic Engineering
• Format: Article
• Language: English
• Published: 2023
• Subjects: Engineering::Electrical and electronic engineering; Circulating Current; DC-Link Current Ripple
• Online Access: https://hdl.handle.net/10356/172151
• Institution: Nanyang Technological University

The high and low order dc-link current ripple can be caused under balanced and unbalanced ac grid/load conditions for three-phase modular multilevel converters (MMCs). To enhance the dc-link current quality, this paper proposes an additional-levels-based control (ALC) method, where the conventional...