Title: Designing of fuzzy corrosion controller for gas pipelines

Authors: J. Gopalakrishnan; Ganga Agnihotri; D.M. Deshpande

Addresses: Electrical Engineering Department, MANIT, Bhopal- 462051, India ' Electrical Engineering Department, MANIT, Bhopal- 462051, India ' Electrical Engineering Department, MANIT, Bhopal- 462051, India

Abstract: Corrosion rate in metallic underground gas pipeline depends on quality of pipeline coatings, soil resistance, soil pH, soil aeration etc. Mathematical modelling of pipeline corrosion process is very difficult. Fuzzy corrosion controller is developed to control corrosion in underground gas pipelines to operate in constant pipe to soil potential mode and constant voltage mode. Conventional transformer rectifier based controllers need human intervention during startup. Pipe to soil potential is the corrosion process monitoring parameter in underground laid pipelines. Error and change in error are considered as inputs for the designed fuzzy controller and deployed at field to protect gas pipeline. In the proposed controller Mamdani type implication and centre of area defuzzification method is used. Controller is designed with different fuzzy sets and obtained results are reported. Fuzzy controller performance is vetted by electrical resistance probe result.

Keywords: corrosion control; controller design; impressed current cathodic protection; ICCP; pipe to soil potential; PSP; virtual instrumentation; fuzzy logic; electrical resistance probes; fuzzy control; underground pipelines; gas pipelines; fuzzy sets.

DOI: 10.1504/IJFCM.2015.069955

International Journal of Fuzzy Computation and Modelling, 2015 Vol.1 No.3, pp.312 - 332

Received: 16 Dec 2013
Accepted: 04 Oct 2014
Published online: 16 Jun 2015 *

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