Grid Interactive Solar PV Based Water Pumping Using BLDC Motor Drive

Rajan Kumar, student of Indian Institute of Technology, Delhi received the Gandhian Young Technological Innovation Award-2017 appreciation for developing a prototype of a Grid Interactive Solar PV Based Water Pumping Using BLDC Motor Drive under the guidance of Prof. Bhim Singh.

Being a grid-isolated or standalone system, the existing brushless DC (BLDC) motor driven water pumps fed by a solar photovoltaic (SPV) array, rely only on solar PV energy. Due to its intermittency, the solar PV generation exhibits its major drawback which results in an unreliable water pumping systems. In the course of bad climatic condition, water pumping is severely interrupted, and the system is underutilized as the pump is not operated at its full capacity. Moreover, an unavailability of sunlight (at night) leads to shutdown of an entire water pumping system. This innovation proposes a bidirectional power flow control of a grid interactive SPV fed water pumping system. A BLDC motor-drive is used to run a water pump. This system and control enable a consumer to operate the water pump at its full capacity for 24-hours regardless of the climatic condition and to feed a single-phase utility grid when the water pumping is not required. The full utilization of SPV array and motor-pump is made possible in addition to an enhanced reliability of the pumping system. Using a single-phase voltage source converter (VSC), a unit vector template (UVT) generation technique accomplishes a bidirectional power flow control between the grid and the DC bus of voltage source inverter (VSI) which feeds a BLDC motor. The maximum power point (MPP) operation of SPV array, and power quality standards such as power factor and total harmonic distortion (THD) of grid are met by this system.

Dr. Prof. K. Vijay Raghavan, Secretary, Department of Biotechnology, honored Rajan Kumar, Department of Electrical, Instrumentation & Related Fields, Indian Institute of Technology, Delhi, with the prestigious Gandhian Young Technological Innovation (GYTI) Award 2017 Appreciation at Rashtrapati Bhavan.

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