Systematic and Novel Approach to Modeling, Analysis and Control of Grid Tied PV Power Supply System Using Integral State Feedback Control and State Observer

Abstract

Today, the share of global energy mix related to renewable energy technologies is rising drastically. The main reason behind this new trend is associated with many global challenges. Sustainable development, climate change and the need for alternative sources of energy are some of the driving forces and also reason’s powering technological innovation in energy sector. However, in order to achieve climate change goals, technological advancements of green energy must be accelerated. In this paper, a grid connected three phase photo-voltaic power supply system using integral state feedback control and state observer has been examined and proposed. Mathematical modeling of main components of the PV system including the power grids, solar panels, DC-DC converter and DC-AC inverter are performed. In addition, in order to increase the efficiency of the proposed system a maximum power point tracking algorithm using fuzzy logic control is introduced. Finally, simulation results using MATLAB shows the effectiveness of the proposed solution. Keyword: PV system, green energy, DC-DC converter, DC-AC converter, Maximum power point tracking.