Current sharing in parallel connected converters using indirect duty ratio adjustment for standalone photovoltaic system

Abstract

Solar energy is considered as the most promising energy sources due to its unlimited power The solar technology that has the maximum influence on our lives is photovoltaic The solar array generates DC power newlinewhich essentially needs to be adjusted by a maximum power point tracker for newlineoperating solar array at its maximum The maximum power from solar array newlineis delivered to the load through multimodal DC DC converters for higher newlinepower generation It is well known that multimodal converters connected in newlineparallel at output results in unequal sharing of load current This is an issue of newlinevital importance when a high output power is demanded Solar integrated multi module converters can be used for higher current generation Current inequality occurs due to dissimilarities in the circuit components and power switches of parallel connected converter modules This research work aims at achieving maximum power from solar photovoltaic system using Adaptive Neuro Fuzzy Inference System ANFIS Maximum Power Point Tracking MPPT controller and addresses a new control scheme for ensuring equal sharing of load current in parallel connected converter modules using Indirect Duty Ratio Adjustment IDRA newlineIt is a two loop control scheme having an outer voltage loop and an inner current loop newline newline