| Title |
Switching Frequency Reduction Method for Modular Multi-level Converter Utilizing Redundancy Sub-module |
| Authors |
이윤석(Lee, Yoon-Seok) ; 유승환(Yoo, Seung-Hwan) ; 최종윤(Choi, Jong-Yun) ; 박용희(Park, Yong-Hee) ; 한병문(Han, Byung-Moon) ; 윤영두(Yoon, Young-Doo) |
| DOI |
https://doi.org/10.5370/KIEE.2014.63.12.1640 |
| Keywords |
HVDC (high-voltage DC transmission) ; MVDC (medium-voltage DC transmission) ; MMC (modular multi-level converter) ; SM (sub-module) ; DC voltage balancing ; redundancy sub-module ; harmonic reduction ; NLC (Nearest Level Compensation) ; Hardware Scaled-Model |
| Abstract |
This paper proposes a switching frequency reduction method for MMC (Modular Multilevel Converter) utilizing redundancy operation of sub-module, which can offer reduction of voltage harmonics and switching loss. The feasibility of proposed method was verified through computer simulations with PSCAD/EMTDC software. Based on simulation analysis, a hardware scaled-model of 10kVA, DC-1000V MMC was designed and manufactured in the lab. Various experiments were conducted to verify the feasibility of proposed method in the actual hardware system. The hardware scaled-model can be effectively utilized for analyzing the performance of MMC according to the modulation scheme and redundancy operation. |