Design and Analysis of a Two-Phase Interleaved Boost Converter Based Microinverter

Abstract

Renewable energy sources (RESs) are extensively researched nowadays. There are many reasons for this such as air pollution, depletion of energy resources, and decreasing fossil fuels. One of the most widely used RES plant is based on solar energy due to its modular structure. This study includes design and analysis of a two-phase interleaved boost converter based micro inverter which is simulated with MATLAB Simulink software. The power capacity of designed micro inverter is 350W where input voltage is nearby 50V and output voltage is set to $\mathbf{220}\ \mathbf{V}_{\mathbf{rms}}$. It consists of two main parts as two-phase interleaved boost converter and H-bridge inverter. They have dedicated controllers to ensure stable operation under varying weather conditions. A maximum power point tracker (MPPT) controls the two-phase interleaved boost converter while the H-bridge is controlled by a PI controller. The THD ratio of voltage and current is 0.66% in FFT spectrum.