The harmonic analysis and the arm capacitor parameters selection of module multilevel matrix converter

Modular multilevel matrix converter (M3C) is a competitive frequency converter option to be used in fractional frequency transmission system (FFTS). However, the previous literatures about M3C seldom study its harmonic issue and arm capacitor parameter selection principle. This paper analyzes the harmonic components of the electrical quantities of M3C by circular iteration and provides the principle of the arm capacitor parameters selection. Finally, the validity of the analysis is confirmed by simulation in PSCAD/EMTDC.