Abstract
This work deals with an intelligent grid integrated solar photovoltaic (PV) powered water pumping system driven by three phase reluctance synchronous motor (RSM) drive. Here, a DC-DC converter is utilized for executing maximum power point tracking (MPPT) algorithm. A voltage source inverter (VSI) is used for feeding power to three phase RSM, from a solar PV array. A three-phase voltage source converter (VSC) is used at grid side to transfer the power from the grid to RSM and reverse. This system provides rated water discharge throughout the day despite change in atmospheric conditions and feeds the surplus power to the three-phase grid. A high efficiency RSM drive without position/speed sensor, is utilized here, to drive the water pump. An intelligent power sharing concept, between PV array and the grid, is proposed here, in which automatic switching among all operating mode happens according the availability of PV power and grid supply. Moreover, the preference is given to solar PV power over the grid supply because of its availability at no cost. The proposed control provides inherent power quality improvement and unity power factor (UPF) operation at grid side in all operating modes. The suitability of the proposed system is tested through simulated results obtained through developed model in MATLAB/Simulink environment.
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