Power Quality Improvement using grid interfaced PV with Multilevel inverter based hybrid filter

In this paper, a Photovoltaic (PV) system integrated with Shunt hybrid active filter (SHAF) is coupled to three phase, four wire grid network. The proposed model uses a multilevel inverter configuration of three level H-bridge based Voltage source Inverter (VSI) for compensating load. Indirect current control technique is used for extraction of harmonics and calculating the reference current generation and found reliable performances related to conventional direct current control technique. For controlling the dc bus voltage, PI and fuzzy logic controller (FLC) is implemented. The operation of proposed system using conventional PI is compared with the FLC and is analysed in both direct and indirect current control technique. The proposed model is run and analysed using MATLAB/ SIMULINK environment.