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Modular Multilevel converters (MMC) have become one of the most promising topologies for DC-AC conversion in recent years. Capacitor voltage balancing is a vital issue for proper operation of the MMC. Generally, conventional sensor-based balancing techniques require a significant amount of measurements, 2m(N-1) voltage sensors and 2m current sensors are required for a N-level m-phase converter. In...
A redundancy balancing technique for the five-level diode-clamped inverter is presented, which balances the four dc-link capacitor voltages at high modulation index and high power factor. The technique is based on dividing the vector space of the five-level inverter into six two-level vector spaces. Dwell times are calculated as for conventional two-level space vector modulation, and the switching...
This paper investigates the compensation and modulation processes of the five-level diode-clamped APF, compensating a three-phase rectified RL load by redundant vectors. From the analysis, a hybrid SVM algorithm allows capacitor voltage balancing. Simulation and experimental results validate the SVM algorithm.
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