Harmonics Mitigation for Grid Connected PV Module with Integration of Multilevel Inverter Topology

This paper proposes a PV source along with MPPT technique is connected to 3-phase grid in synchronisation with the grid voltages. Initially the PV source is integrated with simple six switch power electronic device inverter which is connected to 3-Φ grid. The traditional six switch inverter is further updated with multilevel NPC inverter which generates three level three phase voltages mitigating harmonics in the PCC voltages and currents. A harmonic analysis is carried out on PCC currents with comparison of THDs, using FFT analysis tool available in `powergui' of Simulink using MATLAB software.