Capacitor‐voltage regulation and linear‐range extension of a hybrid cascaded modular multilevel converter

Stability Analysis of a Hybrid Modular Multilevel Voltage Source Converter

“…Hybrid converters that combine the advantages of conventional two-level VSC configuration with the modular multilevel topology have gained interest at the present and novel converter configurations are being developed for this purpose. Current research has been mainly focused on hybrid converter topologies which include Hybrid Multilevel Converter (HMC) with ac side cascaded H-bridge cells [3] [5] [6] [7], HMC with dc side cascaded cells [9] [10] [11], alternate arm converter [1] [2] [8] [11] and HMC with half or full bridge cascaded cells connected across the dc link [4] [11] [12].…”

“…Further the converter is also capable of blocking dc-faults. The second uses cascaded HB cells in main power stage, connected in series with FB cells of a similar arrangement to the previous topology [6] [7].…”