Esmaeil Rokrok - Electrical & Electronics Engineering Dept. Lorestan University Khorramabad, Iran
Mahshid JavidSharifi - Electrical & Electronics Engineering Dept. Lorestan University Khorramabad, Iran

An adaptive hysteresis current controller for single-phase single-stage photovoltaic central inverters is presented. The designed controller is able to eliminate harmonic distortion and to control switching frequency and to inject the current into power grid with good power quality. The simulation model of the system is developed in SIMULINK/MATLAB environment. The controller is found effective in obtaining the desired goal when the switching frequency is adequately high which leads to the synchronization of power grid voltage and inverter current and near to unity power factor.

single-phase single-stage photovoltaic central inverters, adaptive hysteresis controller, phase locked loop