Model reference adaptive controller based stand alone solar PV pumping system

This paper presents a single stage closed loop operation of V/F induction motor drive is connected to stand alone photovoltaic (PV) system. PV source is directly connected to induction motor based pump load through a single stage inverter along with MPPT and V/F capabilities to match the non-linear load and source characteristics. While performing these operations, closed loop rechecking capability is incorporated to the V/F induction motor drive for better accuracy, which decreases the run time of system and results in energy saving to the user. Closed loop pumping operation with load torque and MPPT as feedback to the controller, used for generating PWM pulses to the inverter for V/F control. MATLAB/SIMULINK is used to simulate the proposed configuration and presented a closed loop solution under various irradiations and at different load torque conditions. The simulation result shows that the proposed closed loop method is economical, efficient and performance is superior.