Resumen de A mathematical approach for studying interconnected earthing systems inside MV networks

Angelo Campoccia, Eleonora Riva Sanseverino, Gaetano Zizzo

• Purpose – The purpose of this paper is to define a new methodology for studying interconnected earthing system inside unearthed medium voltage (MV) networks.

  Design/methodology/approach – The developed methodology is based on the division of the MV network into simpler sub‐systems and its resolution using a multiport approach.

  Findings – The methodology has been applied to various situations giving precious information on the behaviour of the interconnected earthing systems. The comparison between the results of the simulations and measurements done on a really existing network has shown that the methodology is able to provide accurate results.

  Research limitations/implications – Some factors can influence the precision of the methodology. Indeed, for a correct simulation of the system it is necessary to know several electrical and geometrical parameters, often obtainable with difficulty.

  Practical implications – Utilities are quite interested in this topic. The study of interconnected earthing systems in MV networks with the purpose of identifying safe extended areas named Global Earthing Systems has important management and economic consequences.

  Originality/value – The paper presents a new analysis methodology applicable to MV networks that surpasses the limits of the analysis methodology generally applied for the study of the same topic in high voltage networks.