• K. Laxmi Prasanna
• Dr. K. Suneeta
• S. Rathna Kumar

A simple and efficient solar photovoltaic (PV) water pumping system utilizing an induction motor drive (IMD) is presented in this paper. This solar PV water pumping system comprises of two stages of power conversion. The first stage extracts the maximum power from a solar PV array by controlling the duty ratio of a DC-DC boost converter. The DC bus voltage is maintained by the controlling the motor speed. This regulation helps in reduction of motor losses because of reduction in motor currents at higher voltage for same power injection. To control the duty ratio, an Ant colony optimization (ACO) based maximum power point tracking (MPPT) control technique is used. A scalar controlled voltage source inverter (VSI) serves the purpose of operating an IMD. The stator frequency reference of IMD is generated by the proposed control scheme. The scalar control eliminates the requirement of speed sensor/encoder. Precisely, the need of motor current sensor is also eliminated. Moreover, the dynamics are improved by an additional speed feed forward term in the control scheme. The proposed control scheme makes the system inherently immune to the pump’s constant variation.

Photovoltaic Cells, MPPT, Water Pumping, Scalar Control, Induction Motor Drives

"A C O Standalone Photovoltaic Water Pumping System Using IMD with Reduced Sensors", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.7, Issue 2, page no.63-70, February-2020, Available :http://www.jetir.org/papers/JETIRDJ06010.pdf

"A C O Standalone Photovoltaic Water Pumping System Using IMD with Reduced Sensors", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.7, Issue 2, page no. pp63-70, February-2020, Available at : http://www.jetir.org/papers/JETIRDJ06010.pdf