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Operation and Analysis of a Modular Converter for Photovoltaic or Fuel cell systems

Renewable energies are environmentally friendly. Two of the most important of these systems are fuel cell and photovoltaic panel. Both systems generate electricity without pollution, but they have low output voltage levels. Low voltage is not suitable for the consumer and additionally, in this case, can increase losses. By applying a modular converter based on three-level boost converter, the output voltage level and consequently the power can be increased. In this paper, recognition and analysis of a modular converter based on three-level boost converter’s behavior are performed. Equivalent circuits during the different intervals of the operation of the studied converter are presented. Operating waveforms of all intervals are given. Possible operating modes are provided. The several operating modes of the modular converter are investigated. The simulation results obtained by using MATLAB/Simulink software are presented and analyzed in the steady-state as well as experimental results.