An Efficient Control Scheme Based on PLL Integrated PI Controller for Grid-connected Solar Photovoltaic Systems

The market for solar energy is growing these days, thanks to recent developments in Photovoltaic (PV) systems. integration of the grid required its optimum utilization. A novel control a single stage 3 phase connected inverter presented this paper. PV array, Voltage Source Inverter (VSI) converting dc ac, and filter that connects it are major components proposed system. output regulated with respect using Synchronous Reference Frame (SRF) control. 3-phase Phase Locked Loop (PLL) used lock frequency relation voltage. Perturb Observe (P&O) algorithm obtain reference voltage corresponding maximum power. To remove high harmonics, combined an LCL filter. dynamic performance system under number stochastic environmental conditions validated MATLAB Simulink platform.
 HIGHLIGHTS
 
 PLL integrated PI controller provided robustness conditions
 Enhanced accurate MPP tracking
 free from harmonics
 Improved performance
 GRAPHICAL ABSTRACT