A Novel Method for Maximum Power Point Tracking of the Grid-Connected Three-Phase Solar Systems Based on the PV Current Prediction

In this paper, it is first attempted to provide a small signal model of the photovoltaic (PV) system, DC-DC boost converter, and pulse width modulation (PWM) generator. Then, technique provided for maximum power point tracking (MPPT) in grid-connected solar systems based on variable adaptive perturbation observation with predictive control PV current. An innovative aspect proposed current method use controller achieve value impedance, which has been used converter. The obtain coming basis model. goal make converter inductor track reference. Voltage ripple minimization added cost function simultaneously as system constraint optimize performance. This reduces amount voltage fluctuations around point. capable detecting rapid changes radiation. A sudden simultaneous increase detected by algorithm then duty cycle becomes increasing instead decreasing. simulation carried out MATLAB Simulink environment real-time 26.6 kW three-phase system. results are compared techniques linear proportional integral derivative (PID) controller-based control. show that total harmonic distortion (THD%) inverter reduced 0.16% PID method. addition, THD% 0.1% output variation less than 5 V.