Power electronics interfaces for grid tied solar system for concurrent active and reactive power control

Abstract

The solar Photovoltaic (PV) systems have gained more attention in renewable energy production due to their cost efficiency, reliability, easy implementation and availability. Typically, the reactive power compensation and harmonics elimination are challenging and demanding tasks for improving the efficacy of grid connected solar PV systems. The successful utilization of PV power is highly depends on the proper energy management scheme, which also helps to enhance the performance of grid-PV systems. For this purpose, many research works developed different converter and controller topologies for solving the power quality issues in grid-PV system. But, it limits with the problems of power quality issues such as increased harmonics, reactive power injection, computation complexity, inefficiency, and reduced performance outcomes. Hence, the proposed work intends to develop an advanced and intelligent controlling and converter methodologies for providing the better reactive power support to grid systems with reduced harmonics distortions, and highly regulated output voltage. newlineThis objective is accomplished in three modules of this research work, in which the initial phase of this work intends to conduct a detailed analysis between two different controlling and converter methodologies for selecting the most suitable mechanism to increase the performance of single phase grid systems. It includes the combination of Artificial Neural Network (ANN) incorporated with Boost DC-DC converter topology, and Sunflower Optimization (SFO) - Self-Tuned Fuzzy Logic Controller (SFLC) integrated with Entwined LUO DC-DC converter. In this module, the working principles, operating modes, and performance results of these two methodologies have been validated and compared by using various evaluation measures. From this analysis, it is observed that the combination of SFO-SFLC-ELUO topology provides improved performance outcomes over the other technique in a grid connected PV system. Hence, it can be selected as the most suitable model for