Fuzzy logic controller based model for rooftop/grid connected solar photovoltaic system

In this paper, the rooftop Solar Photo Voltaic system emphasizes another of source of generation because these can be placed near to the load centers when compared with other non-conventional energy sources of generation. The rooftop Photovoltaic system that is grid connected will support on load and the off grid load with battery backup. The design system should follow that the total utilization of generated power with better efficiency of conversion. This paper proposes a voltage source converter with Synchronous Reference Frame theory by single phase based current controlled with PWM controller to realize maximum generated power by retaining the DC link voltage constant without battery support. The generated maximum power is connected to the grid via voltage source converter. Incremental conductance MPPT algorithm is employed to track the maximum power from PV panels under variable temperature and insolation conditions. The dc link voltage is maintained constant using fuzzy logic controller. The use of incremental conductance MPPT with FLC will eliminate the PI control loop and it reduces the settling time of reactive power of VSC compared to the different techniques with PI controller.