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Arm balancing control and experimental validation of a grid connected MMC with pulsed DC load

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Figure

Fig. 1. Modular Multilevel Converter.
Fig. 5. DC side control diagram - Phase A of the MMC.
Fig. 6. Phase A upper (top) and lower (bottom) arm modulation signalsand total cell capacitor voltages without arm balancing with the converteroperating according to the ratings in Table II for the pulse position of0.534 rad.
Fig. 8. The denominator values vs. the 50 Hz DC voltage ripple phaseangle.
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