Control of Single Phase Grid-Integrated Isolated Converter Based PV Supply

This paper present the control for a single phase grid-integrated photovoltaic supply (SPGIPVS). The SPGIPVS consist of an isolated DC-DC converter (IDDC) and a half bridge voltage source converter (HBVSC). The IDDC facilitates feature of isolation between photovoltaic (PV) panels and the grid, enhancing the PV panel voltage and ensuring maximum PV power harvesting (MPH). To harvest the maximum PV power, a reduced rule based fuzzy logic control (FLC) is used. The HBVSC converts DC power into AC and delivers it to the grid in synchronized way. To synchronize the HBVSC with the grid, a modified third order sinusoidal integrator (mTOSSI) based band pass filter (BPF) is developed. The mTOSSI extracts the synchronization signal even if grid voltage is polluted. The performance is evaluated using MATLAB 2022a platform.