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Research Papers

Design of an Adaptive Cathodic Protection Device Powered by Four Photovoltaic Solar Panels

[+] Author and Article Information
S. Kharzi

Division Energie Solaire Photovltaïque, Centre de Développement des Energies Renouvelables, B.P. 62, Route de l’Observatoire, Bouzaréah, Alger 16340, Algeriaksouhila@hotmail.com

M. Haddadi

Laboratoire de Dispositifs de Communications et de Conversion Photovoltaïque, Ecole Nationale Polytechnique, Rue Hassen Badi, El Harrach, Alger 16200, Algeriamourad_haddadi@yahoo.fr

A. Malek

Division Energie Solaire Photovltaïque, Centre de Développement des Energies Renouvelables, B.P. 62, Route de l’Observatoire, Bouzaréah, Alger 16340, Algeriaamalek@cder.dz

L. Barazane

Laboratoire de Dispositifs de Communications et de Conversion Photovoltaïque, Ecole Nationale Polytechnique, Rue Hassen Badi, El Harrach, Alger 16200, Algerialbarazane@yahoo.fr

J. Sol. Energy Eng 131(2), 021003 (Mar 24, 2009) (9 pages) doi:10.1115/1.3090821 History: Received September 08, 2007; Revised June 21, 2008; Published March 24, 2009

Among a large number of photovoltaic applications, we are interested in the cathodic protection. It is one of the solutions used for the structures subjected to corrosion, mainly in oil and gas industries. In this work, optimum design sizing and system description are presented. Based on the design of a solar photovoltaic powered minicathodic protection system, a standard configuration of the photovoltaic system using a combination of four panels (two in series and two in parallel), has been derived. This standard size option must be matched at any cases of the cathodic protection station. For this purpose, an adaptive circuit, which is a voltage regulator with variable output, has been developed. Usually, cathodic protection systems work with constant current output, which is the necessary condition to procure immunity voltage of the structures against corrosion. The major difficulty to achieve this goal is the variations in the surrounding medium resistivity. To overcome this difficulty, several systems of control and regulation intended for cathodic protection system powered by photovoltaic energy have been designed and discussed. In our case, we propose an adaptive adjustment of the buck-boost converter output voltage by means of the microcontroller pulse width modulation output. In this paper, a complete design of the adaptive cathodic protection system using photovoltaic energy is carried out.

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Copyright © 2009 by American Society of Mechanical Engineers
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Figures

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Figure 2

Synoptic scheme of the ICCP station powered by photovoltaic energy system

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Figure 3

Block diagram of the regulated cathodic protection system

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Figure 4

Buck-boost control scheme

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Figure 5

Schematic design of the cathodic protection regulator system

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Figure 6

Microcontroller program flow chart

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Figure 9

Generated output voltage and duty cycle in the third case for (a) Vout=24 V and (b) Vout=56 V

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Figure 8

Generated output voltage and duty cycle in the second case for (a) Vout=24 V and (b) Vout=56 V

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Figure 7

Generated output voltage and duty cycle in the first case for (a) Vout=24 V and (b) Vout=56 V

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Figure 1

Sizing steps of the pair (photovoltaic generator batteries) of the photovoltaic system powered ICCP station

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