Seven levels highly efficient modular multilevel matrix converter (M3C) for low frequency three-phase AC-AC conversion

Abstract

An Innovative Modular multilevel matrix converter (M3C) is proposed with reduced number of switching device owing to the improved efficiency, reduced cost and minimizes the size. Offshore Low-Frequency AC (LFAC) transmissions are economical with greater reliability for short and intermediate distance transmissions. Similar to HVDC, it increases the transmission capacity and also distance can be increased in LFAC.M3C is proposed as frequency converters for LFAC transmissions which link AC systems operating at 16.7 and 50 Hz. The double αβ0 transform control technique has been the most often used approach for decoupling control of input, output and circulating currents in such applications. The performances of this work’s proposed modular multilevel matrix converters are analysed using simulation in MATLAB/SIMULINK software.

Keywords

• Modular multilevel matrix converter (M3C)
• PMSG wind turbine
• MOSFET
• power grid
• offshore low frequency AC (LFAC) transmission
• branch energy balance circuit