Power Quality Improvement in Grid Connected Photovoltaic System with Three Level Neutral Point Clamped Inverter

Abstract

The efficient interleaved boost converter (IBC) combined with the 3-level neutral point clamped (NPC) inverter for grid-connected photovoltaic systems (GCPVS) maximizes solar energy efficiency are presented.  Enhancing power quality at the Point of Common Coupling (PCC) while utilizing the rated capacity of the inverter into consideration is the main goal of the proposed approach.  The grid connected photovoltaic system includes an efficient three-level NPC inverter and interleaved boost converter to decrease DC link voltage oscillation. In addition to preventing overheating, the inverter current controls reactive power adjustment, active power injection, and current harmonic filtering. Using MATLAB, the proposed topology is implemented, and the results are contrasted with those of other existing techniques. The proposed method attains a THD of 2.5%. The proposed technique displays the efficiency is 95%. When compared to existing strategies, the proposed technique displays lower THD and high efficiency.