Low cost PV based irrigation pump using SR motor with cascaded 'BO BU' converter
The paper aims at the development of photovoltaic (PV) energized irrigation pump employing a switched reluctance (SR) motor with a cascaded boost buck (Bo Bu) converter as a power conditioning stage. The utilized DC DC converter as power conditioning stage comprises of a boost converter followed by a buck converter with proper voltage control. It performs the functions of maximum power point tracking (MPPT) and limits the large starting inrush current of SR motor. The cascaded 'Bo Bu' converter successfully mitigates all the problems of boost converter and buck converter coming with PV array and it exhibits their advantages with non inverting buck boost operation. Moreover, good utilization of switches, low stress on its components and non inverting voltage output are the other benefits which make it suitable for proposed system. A commutation angle dependent control technique is used to provide the self starting to the SR motor. An IC (Incremental Conductance) based MPPT controller is utilized to maximize the power of PV array. The performance of proposed system is authenticated by both MATLAB/Simulink model based simulated results and experimental responses under varying environmental conditions.
2016 IEEE 7th Power India International Conference (PIICON)