This paper is rejected in Volume-5, Issue-2, 2019
Area
Power System
Author
Puviarasan D., Chintala Venkatesh
Org/Univ
SMK Fomra Institute of Technology, Chennai, Tamil Nadu, India
Keywords
Solar PV array, MPPT, BLDC motor, VSI, Water pump, Soft-starting, Speed control
Abstract
In order to optimize the solar photovoltaic (PV)generated power using a maximum power point tracking (MPPT) technique, a DC-DC conversion stage is usually required in solar PV fed water pumping which is driven by a brushless DC (BLDC) motor. This power conversion stage leads to an increased cost, size, complexity and reduced efficiency. As a unique solution, this work addresses a single stage solar PV energy conversion system feeding a BLDC motor-pump, which eliminates the DC-DC conversion stage. A simple control technique capable of operating the solar PV array at its peak power using a common voltage source inverter (VSI), is proposed for BLDC motor control. The proposed control eliminates the BLDC motor phase current sensors. No supplementary control is associated with the speed control of motor-pump and its soft start. The speed is controlled through the optimum power of the solar PV array. The suitability of the proposed system is manifested through its performance evaluation using MATLAB/Simulink based simulated results and experimental validation on a developed prototype, under the practical operating conditions.