Title :
Novel capacitor voltage balancing algorithm for modular multilevel converter
Author :
Moranchel, M. ; Bueno, E.J. ; Rodriguez, F.J. ; Sanz, I.
Author_Institution :
Dept. of Electron., Alcala Univ., Alcala de Henares, Spain
Abstract :
In this paper is presented a novel capacitor voltage balancing algorithm for Modular Multilevel Converter. The problem in the Modular Multilevel Converter is that the DC-BUS voltage doesn´t distribute equally between the capacitors producing voltages unbalances. These voltages unbalances are produced by multiple factors such asymmetries, modulation or by circulating current and influence the correctly operation of the power converter. If these voltages unbalances are not controlled, the DC-BUS voltage ripple increases. In addition, the converter may destabilize up to the point of failure so it should turn off.
Keywords :
power capacitors; power convertors; DC-BUS voltage ripple; capacitor voltage balancing algorithm; modular multilevel converter; power converter; Algorithm design and analysis; Capacitors; Converters; HVDC transmission; Switches; Threshold voltage; Voltage control; Capacitor Voltage Balancer; Modular Multilevel Converter; ripple;
Conference_Titel :
Industrial Electronics Society, IECON 2014 - 40th Annual Conference of the IEEE
DOI :
10.1109/IECON.2014.7049210
