Maximum power point tracking of photovoltaic water pumping system using fuzzy logic controller

F.A.O. Aashoor, F.V.P. Robinson

Research output: Chapter in Book/Report/Conference proceedingConference contribution

27 Citations (Scopus)

Abstract

Diode junction photovoltaic (PV) generators exhibit nonlinear V-I characteristics and the maximum power extractable varies with the intensity of solar radiation, temperature and load conditions. A maximum power point tracking (MPPT) controller is therefore usually employed in PV-generator applications to automatically extract maximum power irrespective of the instantaneous conditions of the PV system. This paper presents a fuzzy logic control (FLC) scheme for extracting the maximum power from a stand-alone PV generator for use in a water pumping system. The PV-generator system comprises a solar panel, DC-DC buck chopper, fuzzy MPP tracker and permanent DC-motor driving a centrifugal pump. The fuzzy controller generates a control signal for the pulse-width-modulation generator which in turn adjusts the duty ratio of the buck chopper to match the load impedance to the PV generator, and consequently maximizes the motor speed and the water discharge rate of a coupled centrifugal pump. The control method has been modelled in Matlab/Simulink and simulation results are presented to confirm its significantly improved power extraction performance under different sunlight conditions, when compared with a directly-connected PV-generator energized pumping system operating.
Original languageEnglish
Title of host publication2013 48th International Universities' Power Engineering Conference
Place of PublicationDublin
PublisherIEEE
Pages1-5
Number of pages5
ISBN (Print)9781479932542
DOIs
Publication statusPublished - 2013
Event2013 48th International Universities' Power Engineering Conference, UPEC 2013 - Dublin , Ireland
Duration: 2 Sep 20135 Sep 2013

Conference

Conference2013 48th International Universities' Power Engineering Conference, UPEC 2013
CountryIreland
CityDublin
Period2/09/135/09/13

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