2015/08/31 by Weixing Lin, Dragan Jovcic, Samuel Nguefeu +1
Engineering · #HVDC Systems and Fault Protection #High-Voltage Power Transmission Systems #Silicon Carbide Semiconductor Technologies
paper · doi:10.1109/tpwrd.2015.2475130
openalex publication_date 2015/08/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/29
The design and operation of full-bridge (FB) MMCs that meet HVDC specifications are studied in this paper. Three new design parameters: 1) the overmodulation index ( kMMC); 2) the dc modulation index ( Mdc); and 3) the minimal dc voltage ( Vminpu) are introduced to specify the operation of an FB MMC. Power increase and semiconductor count increase with the increase of kMMCare analyzed to understand the benefits of overmodulation. The required number of submodules and the number of more costly FB submodules for specified rated dc voltage Vminpuand k MMC are calculated. The relationship of the submodule inserting logic and dynamics of an arm is analyzed. Submodule voltage balancing is studied, and the constraints on the required number of FB submodules are deduced. The capability of overmodulation and the operation under low dc voltage with optimal submodule counts are verified using Electromagnetic Transients Program simulation.