Modeling And Analysis of PV Micro-Inverter

Abstract: Solar energy based micro-inverters are becoming more popular. Each solar panel in a system has its own low power inverter, its possibility to shading and PV cell malfunction is less. The micro-inverter is the integration of inverter and PV module in one electrical device. Micro-inverters convert the DC power from one PV module (solar panel) to the AC grid, and are designed for an output power in the range of 180W to 300W. A single stage photovoltaic (PV) micro-inverter is presented in this paper for single phase configuration. The proposed micro-inverter uses a forward converter at the input in a diagonal topology having only two power switches. It generates a large output voltage compared to the input from the PV panel. Sinusoidal PWM is used to control the two input switches. This topology has the advantages like: (1)very simple architecture. (2) Only two switches are used for switching and control of the inverter. Matlab /Simulink is used for software implementation.

Keywords: PV Micro-inverter, Solar cell, Maximum power point tracking