Power Quality Assessment and Enhancement using FLC based SPV Supported Cascaded H-Bridge Multilevel Inverter

Abstract

Solar photovoltaic (SPV) is one of the most common renewable energy sources used at present. The major issue with renewable energy resources is power quality to meet the growing energy demand. In recent times reliability and flexibility of energy supply are also associated with the quality of power. The issues attached with line faults, voltage sag/swell, harmonics in supply and flicker are the key concerns for poor power quality. The new scenario is designed to challenge electrical resources like generation, transmission and distribution. Considering renewable energy in the existing power system requires additional research and analysis to synchronize new components. From this point of view, many power electronics converters and switching devices are designed to increase the reliability and efficiency of the system. Similarly, solar PV system requires a maximum power point tracker to extract the power upto the maximum extent. It consists of two stages: DC to DC converter and Pulse Width Modulation controlling phase. A multi-level inverter (MLI) is used to enhance the power quality of the overall system. It reduces the harmonics distortion and stabilizes the system near the unity power factor. This paper comprehensively analyses the cascaded H-bridge Multilevel Inverter associated with the fuzzy logic controller (FLC) and SPV system. The simulation results are compared with the 3-level and five levels Multilevel Inverter.