Stability of grid-connected modular multilevel converter with open- and closed-loop ac-side control
Paper in proceedings, 2017
The stability of grid-connected modular multilevel converter (MMC) under two control strategies is
studied in this paper. For this purpose, the ac-side input admittance of the MMC is derived under openand
closed-loop ac-side control strategies. The derived analytical models are used to investigate the
impact of the two approaches on the stability of the MMC and detailed time-domain simulations are
used to the verify the theoretical findings.