Enhanced Performance of Single-Phase Transformer less Inverter for Grid-Connected Photovoltaic Systems with Leakage Current Reduction

Abstract

Single-phase transformer less inverters is increasingly popular for small-scale grid-linked photovoltaic systems because of their higher effectiveness, low cost, and higher power density. Nevertheless, leakage current remains a significant concern in these inverters. To overcome these challenge, this paper presents a Lotus effect optimization algorithm (LEA) for enhanced performance of single-phase transformer less inverter for grid-linked photovoltaic systems with leakage current reduction .The major goal of the proposed method is to minimize ground leakage current, reduce THD, and enhance overall system performance and efficiency.The LEA is used to optimize the control signal of the inverter. The proposed technique is executed on the MATLAB platform and compared with existing techniques like the Manta Ray Foraging Optimization (MRFO), Chimp Optimization Algorithm (ChOA), and Improved Crayfish Optimization Algorithm (ICOA) to evaluate its performance. In contrast, existing methods demonstrate lower efficiency, with MRFO at approximately 96%, ChOA at approximately 91%, and COA at approximately 89%. This notable increase in efficiency underscores the superior performance and effectiveness of the proposed method, achieving approximately 99.5%, highlighting its enhanced capabilities compared to traditional approaches.