A Grid Connected Single Phase Inverter Controlling Two Solar Pv Arrarys Operating Under Different Atmospheric Conditions

Abstract

This project presents a grid-connected single-phase transformerless inverter designed to control two solar photovoltaic (PV) arrays operating under different atmospheric conditions such as unequal irradiance and temperature. In conventional PV systems, mismatch between arrays due to partial shading or varying environmental conditions reduces overall power extraction and system efficiency. To overcome this limitation, the proposed system integrates two series-connected PV subarrays with independent maximum power point tracking (MPPT) control, allowing each array to operate at its own optimal power point regardless of differing conditions. The transformerless inverter topology reduces system cost, size, and power losses while improving conversion efficiency. A dedicated control strategy ensures proper grid synchronization, sinusoidal current injection, low harmonic distortion, and stable power delivery to the utility grid. By enabling independent power optimization for both PV arrays within a single inverter stage, the proposed system significantly enhances energy harvesting, reduces mismatch losses, and provides an efficient and reliable solution for residential and distributed solar power applications under non-uniform atmospheric conditions.