HVDC transmission system using multilevel power converters based on dual three-phase two-level inverters
A HVDC transmission system based on a multilevel structure with two DC links. Multilevel AC voltage waveforms from standard three-phase converters connected to a three-phase open winding transformer. The total power transmitted in the DC link is shared by the two three-phase converters. The control algorithm is based on sliding mode control theory coupled to a space vector modulator. The proposed HVDC system has been tested by numerical simulations.
multilevel power converter high-voltage direct-current (hvdc) two level voltage source converters dual converters