Pipe Grounding Conditions for AC Potential Reduction: An Extended Study
Authors: Adedeji KB, Ponnle AA
DOI Info: http://doi.org/10.5281/zenodo.5045452
ABSTRACT
One of the strategies to reduce the influence of AC power line interference on pipelines is to ground the pipe at its end(s) or some points along the parallel route with the line. These strategies are referred to as grounding conditions and prior works in the literature have analyzed a number of these conditions for metal pipelines. However, in this study, it was discovered that the length of the parallel route can have an impact on the effectiveness of the grounding conditions. Thus, this effect was investigated using a real-life AC power line to pipeline interference problem. Additionally, for each grounding conditions, not only was the impact of the length of the parallel route examined but also the effectiveness of four dissimilar/different pipe coatings investigated. The AC power line to pipeline interference problem was formulated utilizing the notion of mutual impedance between two circuits. For each of the grounding conditions, it was discovered that the induced potential on the pipe varied substantially with variations in this length. Also, under these conditions, the effectiveness of some coatings in reducing the induced potential was discussed. In some of the coatings, AC potential of less than 50 V was observed on the pipe while in some cases, extremely high potential in the order of kV was observed depending on grounding condition and the exposed length considered.
Affiliations: Department of Electrical and Electronics Engineering, School of Engineering and Engineering Technology, Federal University of Technology, PMB 704, Akure, Ondo State, Nigeria.
Keywords: AC Interference, Induced Potential, Pipelines, Pipe Grounding, AC Power Lines
Published date: 2021/06/30
