Design of Power Rectifier Circuit for Three-level Back-to-Back Converter

This paper presents the design of power rectifier circuit for three-level back-to-back converter (B2B converter). The AC electric power energy generated from the renewable energy source requires the DC power energy. In this paper, it is focused on the control algorithm of B2B converter for DC-link voltage using MATLAB/Simulink environment. In addition, the prototype is implemented by dSPACE DS1104 board. This converter can reduce the distortion of voltage and current waveforms and also adjust the DC-link voltage. The simulation results shown that the power rectifier circuit by space vector pulse width modulation can control the DC-link voltage suitably during changing loads. The output waveform of the current is less distortion than the input current waveform. Moreover, the experimental results shown that the proposed power rectifier circuit has improved the performance in energy conversion by AC voltage input about 200 V including DC voltage output about 364 V.