A Single-Phase Grid Connected PV System with Cascaded Fuzzy Controlled Boost Converter

The MG (Microgrid) system is expanding as a potential and dependable alternative to the rising demand for utility supply and transmission lines carried on by an increased demand for electricity resulting from growing population. Since MG focuses on renewable energy sources, it has gained interest among investors and researchers. PhotoVoltaic (PV) system is regarded as best renewable energy technologies because of its applicability for distributed generation, satellite systems and transportation. However, MG suffers from maintaining continuity of supply from PV to load. Hence, the grid connected PV system has to maintain uniform distribution to avoid transmission loss. In this paper, a single phase grid connected PV system along with Boost converter is introduced to maintain uniform power supply. A Cascaded fuzzy based PI controller is utilized to control Boost converter operation. The Voltage Source Inverter (VSI) coupled to an LC filter produces sinusoidal outputs with low harmonic content, which is obtained constant from DC link voltage. By using conventional Proportional Integral (PI) controller, an improved grid synchronization is therefore obtained. In Matlab, the proposed work is simulated and the outputs generated indicates improved functioning of the proposed system.