Title :
A distributed PWM strategy for modular multilevel converter
Author :
Debnath, Suman ; Jiangchao Qin ; Saeedifard, Maryam
Author_Institution :
Sch. of Electr. & Comput. Eng., Purdue Univ., West Lafayette, IN, USA
Abstract :
The modular multilevel converter (MMC) has become a potential candidate for medium/high-power applications including high-voltage direct current (HVDC) transmission, adjustable speed drive, and static var compensation systems. One of the technical challenges associated with the control of an MMC is the choice of pulse width modulation (PWM) strategy along with a submodule (SM) capacitor voltage balancing algorithm without imposing high computational burden on the controller and/or unnecessary switching transitions among the SMs. This paper proposes a distributed PWM strategy with an improved SM capacitor voltage balancing algorithm which aims at reducing the computational burden of the controller, the electro-magnetic interference and the switching frequency. The validity of the proposed PWM strategy and the SM capacitor voltage balancing algorithm is confirmed by simulation and experimental results.
Keywords :
PWM power convertors; HVDC transmission; MMC control; SM; adjustable speed drive; distributed PWM strategy; electromagnetic interference; high-voltage direct current transmission; modular multilevel converter; pulse width modulation strategy; static var compensation system; submodule capacitor voltage balancing algorithm; switching frequency; switching transitions; Capacitors; Pulse width modulation; Signal processing algorithms; Sorting; Switching frequency; Voltage control; AC-DC power converters; HVDC transmission; Power electronics; electromagnetic interference (EMI); modular multilevel converters (MMCs); motor drives; pulse width modulation (PWM); switching losses;
Conference_Titel :
Industrial Electronics Society, IECON 2014 - 40th Annual Conference of the IEEE
DOI :
10.1109/IECON.2014.7048626
