DC TO AC INVERTERS FOR SOLAR PANEL

Microinverters are a type of inverter that is connected to a single solar panel. They convert the DC power generated by the panel into AC power, which can then be used to power a home or business. Microinverters have several advantages over traditional string invertersA solar inverter converts the variable direct current (DC) output of a photovoltaic (PV) panel into alternating current (AC) that can be fed into a commercial electrical grid or used by a local, off-grid electrical network.In this project, a micro inverter is designed by using MATLAB Simulink software, and the control algorithms are implemented according to the Incremental Conductance method. It consists of an isolated boost converter with Maximum Power Point Tracking (MPPT) and H-bridge inverter with PI controller. The reaction of the system has been observed under changing irradiation conditions and load conditions. The implemented micro inverter has compensated the irradiation changes at boost converter stage, and dcac conversion process is performed regarding the designed PI controller. The dc bus voltage is increased to around 300V, and the HF transformer is used to increase inverter input voltage to 430V. The output of the inverter is observed around 220v Rms line voltage. The THD rates for both voltage and current are measured at 0.51% in the FFT spectrum, and the overall power of the micro inverter is supplied around 220W.