Single-phase single-stage grid-interactive photovoltaic system with active filter functions

This paper deals with modeling, control and co-simulation of a single-phase single-stage Grid-interactive photovoltaic (PV) system with active filter functions. Single-phase PV systems are the most prevalent in roof-top configurations. In this paper, the modeling of a PV array with maximum power point tracking is performed in MATLAB/Simulink. The developed PV array model may be directly connected to dc-side of the voltage source inverter used for grid PV interaction in order to evaluate its performance. This paper also deals with the development of a controller which either controls PV power or works as an active power filter or performs both the functions simultaneously. The injected active and reactive powers are regulated by changing the phase and amplitude, respectively, of the inverter output voltage. The simulation model of the overall system is developed in MATLAB/Simulink environment and then co-simulated (real-time) in digital signal processor TMS320F2812 through processor in loop (PIL) under rapidly changing atmospheric and load conditions to confirm its effectiveness as well as robustness.