Title :
Modeling and voltage method for Modular multilevel converter
Author :
Mondardo Cunico, Lucas ; De Novaes, Yales Romulo ; Vidal Garcia Oliveira, Sergio
Author_Institution :
Santa Catarina State Univ., Joinville, Brazil
Abstract :
The Modular Multilevel Converter (MMC) is one of interesting transformerless multilevel converter topology intended for medium and high-voltage power conversion. The MMC is formed by a cascade connection of several identical submodules and requires charge balancing of the multiple floating capacitors of the submodules. This paper proposes a new balancing method for the floating capacitor voltage. The proposed control system uses the common component in the arms current to achieve the total leg voltage and differential arm voltage control. The dynamic modeling of the converter is presented. Therefore, the design of a digital system control is included. Experimental results based on 2.2 kW prototype are presented to demonstrate the performance of the proposed system.
Keywords :
digital control; power convertors; voltage control; MMC; charge balancing; converter dynamic modeling; differential arm voltage control; digital system control; floating capacitor voltage; high-voltage power conversion; medium-voltage power conversion; modular multilevel converter; power 2.2 kW; total leg voltage control; transformerless multilevel converter topology; Capacitors; Frequency conversion; Frequency response; Modulation; Switches; Topology; Voltage control;
Conference_Titel :
Energy Conversion Congress and Exposition (ECCE), 2013 IEEE
Conference_Location :
Denver, CO
DOI :
10.1109/ECCE.2013.6646688