An Efficient Pv Energy Conversion System Using Modified Variable Step Size Mppt And Cascaded Multilevel Inverter

Abstract

Advanced multilevel inverter topologies and efficient Maximum Power Point Tracking (MPPT) techniques for grid-connected photovoltaic (PV) systems have been expedited by the growing demand for renewable energy integration. In order to optimize solar energy extraction under various environmental conditions, this paper suggests the integration of a Modified Variable Step-Size Perturb and Observe (MVSS-P&O) MPPT algorithm with a high-performance PV-fed Cascaded Multilevel Inverter (CMLI).[1] In comparison to conventional P&O methods, the proposed MPPT technique dynamically modifies the perturbation step size in response to irradiance and temperature fluctuations, thereby reducing steady-state oscillations and enhancing tracking speed.[2] The maximum power extracted is fed into a seven-level cascaded multilevel inverter, which produces a high-quality output voltage with reduced Total Harmonic Distortion (THD) and decreased switching losses. To maintain stable operation under dynamic load situations and control the inverter output, an intelligent control technique is used. MATLAB/Simulink is used to model and simulate the entire system, and its performance is assessed under various operating conditions. Improved MPPT efficiency, quicker convergence to the maximum power point, better power quality, and better inverter performance are all shown by simulation results. The suggested technology is appropriate for contemporary grid-connected and standalone solar applications and achieves effective renewable energy conversion.