Genetic algorithm based cascaded H-bridge multilevel inverters for PV system with MPPT technique

This paper presents a single-phase seven-level cascade H-Bridge multilevel inverter for photovoltaic systems making use of maximum power point tracking technique with genetic algorithm to reduce total harmonic distortion. Cascaded H-Bridge multilevel inverters are very popular in the power conversion systems for high power and power quality demanding applications. This configuration of multilevel level inverter reduces the value of total harmonic distortion. The proposed system consists of three H-Bridge inverters with individual photovoltaic array with separate perturbs & observer based maximum power point tracking and DC-DC boost converters. Genetic algorithm is used to control the switches of inverter to minimize harmonics in MLIs which is a complex optimization problem involving non-linear transcendental equation. The work presented in this paper is implemented using MATLAB software based simulation with different irradiation and temperature conditions.