Investigation Analysis of Dual Loop Controller for Grid Integrated Solar Photovoltaic Generation Systems

This manuscript emphasizes analytical and experimental study of 1-phase grid integrated solar photovoltaic generation systems. A comparison between sole stage and double stage topology for solar grid-connected system is presented. A small scale double stage solar photovoltaic generation system is modelled and simulated. A fuzzy logic perturb and observe maximum power point tracking controller is implemented. A model predictive current controller with switching frequency constrain is proposed for the grid side interfacing inverter. The controller reduces the harmonic distortions present in the output current of the grid interfacing converter. It is also characterized by fast dynamics regulating the output power factor consistent with the fluctuating load demands. The cogency of the proposed controller is authenticated by experimental implementation using dSPACE 1104 real-time controller.