Abstract

This paper proposes a simple, cost effective and efficient brushless DC (BLDC) motor drive for solar photovoltaic (SPV) array fed water pumping system. The importance of using a maximum power point tracking (MPPT) algorithm is demonstrated to ensure that a PV system provides the most energy possible. Two different maximum power point tracking (MPPT) algorithms are introduced. A boost converter is used in order to extract the maximum available power from the SPV. An appropriate control of boost converter through the Perturb & Observe maximum power point tracking (PO-MPPT) algorithm offers soft starting of the BLDC motor. Increment conductance is used and compared with the PO - MPPT. The speed control of BLDC motor is performed by PWM (Pulse Width Modulation) control of the voltage source inverter (VSI) using DC link voltage regulator. A Matlab/ Simulink models of the solar panel, dc to dc boost converter, and control algorithms are validated.

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