A fuzzy logic MPPT controller based three phase grid-tied solar PV system with improved CPI voltage

This paper presents a fuzzy logic controller (FLC) based 3-φ grid-tied solar Photovoltaic aimed at grid side for change in voltage at CPI (common point of interface) by means of a DC link voltage control which is adaptive in nature. In this, boost converter with MPPT (Maximum power point tracking) procedure is used to pull out solar energy from solar PV module and feed the DC link of PV (photovoltaic) inverter. The VSC (voltage source converter) enables PV inverter to feed the power to the main grid. The proposed MPPT technique provides better dynamic performance than conventional MPPT technique under an abrupt change in voltage at CPI. The proposed FLC MPPT based solar PV system is modeled and results are validated in MATLAB/SIMULINK.