Title :
Modular multilevel converter based unidirectional medium/high voltage drive system
Author :
de Sousa, Gean J. M. ; Heldwein, Marcelo L.
Author_Institution :
Electr. Eng. Dept., Fed. Univ. of Santa Catarina (UFSC), Florianópolis, Brazil
Abstract :
This work introduces a novel unidirectional Power Electronics system of converters to be applied in medium/high voltage (MV/HV) drives. The system employs two modular multilevel converters (MMCs) connected through a MV/HV dc bus. The active rectifier is a new unidirectional MMC topology and the inverter is the already known MMC. This is feasible since most of the MV drives present today do not require energy regeneration. The resulting unidirectional system leads to increased reliability and reduced components count. A proper control strategy is presented to provide unit power factor at the mains side and field oriented control at the machine side. Simulation results from a system driving a three-phase 11 kV/1.9 MW induction motor from a 11 kV/60 Hz ac grid are presented.
Keywords :
induction motor drives; invertors; machine vector control; power convertors; power factor; MMC topology; MV-HV dc bus; ac grid; control strategy; field oriented control; inverter; modular multilevel converter; power 1.9 MW; three-phase induction motor; unidirectional medium-high voltage drive system; unidirectional power electronics system; unit power factor; voltage 11 kV; Capacitors; Induction motors; Inductors; Inverters; Torque; Vectors; Voltage control;
Conference_Titel :
Industrial Electronics Society, IECON 2013 - 39th Annual Conference of the IEEE
Conference_Location :
Vienna
DOI :
10.1109/IECON.2013.6699276
