Enhanced Intelligent Closed Loop Direct Torque and Flux Control of Induction Motor for Standalone Photovoltaic Water Pumping System

Abderrazek Saoudi, Saber Krim and Mohamed Faouzi Mimouni
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Abderrazek Saoudi: Electrical Engineering Department, Higher National Engineering School of Tunis, University of Tunis—Tunisia, Montfleury, Tunis 1008, Tunisia
Saber Krim: Laboratory of Automatic, Electrical Systems and Environment, National Engineering School of Monastir, University of Monastir, Monastir 5000, Tunisia
Mohamed Faouzi Mimouni: Laboratory of Automatic, Electrical Systems and Environment, National Engineering School of Monastir, University of Monastir, Monastir 5000, Tunisia

Energies, 2021, vol. 14, issue 24, 1-21

Abstract: This paper aims to search for a high-performance low-cost standalone photovoltaic water pumping system (PVWPS) based on a three-phase induction motor (IM). In order to control the IM, a fuzzy direct torque control (FDTC) is proposed in this paper for overcoming the limitations of the conventional direct torque control (CDTC). In fact, the CDTC suffers from several problems such as torque ripples, current distortion, and switching frequency variations. These problems can be solved with the proposed FDTC. To ensure high performance of the PVWPS, the reference torque is generated using a fuzzy speed controller (FSC) instead of a conventional proportional integral speed controller. In order to extract the maximum amount of power, the proposed maximum power point tracking controller is based on variable step size perturb and observe to surmount the weakness of the conventional perturb and observe technique. The performance of the proposed FDTC based on the FSC under variable climatic conditions is demonstrated by digital simulation using Matlab/Simulink. The obtained results show the effectiveness of the suggested FDTC based on the FSC compared with the CDTC in terms of pumped water, reduction in flux and torque ripple, diminution of losses, and decrease in the stator current harmonic.

Keywords: maximum power point tracing (MPPT); direct torque control (DTC); fuzzy logic control (FLC); induction motor (IM); photovoltaic water pumping system (PVWPS) (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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