Fig. 16

SMs operation of phase ‘c’ during frequent step changes of active power. (a) Capacitors voltage of upper arm, (b) capacitors voltage of lower arm, (c) SM1 voltage at the upper and lower arms, (d) line to line unfiltered voltage of MMC.

SMs operation of phase ‘c’ during frequent step changes of active power. (a) Capacitors voltage of upper arm, (b) capacitors voltage of lower arm, (c) SM1 voltage at the upper and lower arms, (d) line to line unfiltered voltage of MMC.