Capacitor balancing of a modular multilevel inverter using a modulation strategy

The Modular Multilevel Inverter (MMI) is a new solution for medium and high voltage, and high power applications. It consists of certain modules, each being a half-bridge parallel to a capacitor. The special characteristic of Modular Multilevel Inverter is its ability to build near sinusoidal voltage waveform by adding several modules in each phase-leg of the inverter. At the beginning, basic concept about the modular multilevel inverter and the control scheme are introduced in detail. Then, the capacitor voltage balancing of modular multilevel inverter with the help of phase disposition level shifted PWM are explained and simulated using MATLAB/simulink.

[1]  Rainer Marquardt,et al.  An innovative modular multilevel converter topology suitable for a wide power range , 2003, 2003 IEEE Bologna Power Tech Conference Proceedings,.

[2]  Massimo Bongiorno,et al.  Design of a Modular Multilevel Converter as an Active Front-End for a magnet supply application , 2014, 2014 16th European Conference on Power Electronics and Applications.

[3]  Olimpo Anaya-Lara,et al.  Modular multilevel inverter: Pulse width modulation and capacitor balancing technique , 2010 .

[4]  D. G. Holmes,et al.  Enhanced voltage balancing of a flying capacitor multilevel converter using Phase Disposition (PD) modulation , 2011, 2009 IEEE Energy Conversion Congress and Exposition.

[5]  S. Bernet,et al.  Design and comparison of 4.16 kV neutral point clamped, flying capacitor and series connected H-bridge multi-level converters , 2005, Fourtieth IAS Annual Meeting. Conference Record of the 2005 Industry Applications Conference, 2005..

[6]  Dushan Boroyevich,et al.  Voltage-balance limits in four-level diode-clamped converters with passive front ends , 2005, IEEE Transactions on Industrial Electronics.