International Standards define a Global Earthing System as an earthing net created interconnecting local Earthing Systems (generally through the shield of MV cables and/or bare buried conductors). In Italy the Regulatory Authority for Electricity and Gas requires Distributors to guarantee the electrical continuity of LV neutral conductor. This requirement has led to the standard practice of realizing “reinforcement groundings” along the LV neutral conductor path and at users’ delivery cabinet. Moreover, in urban high load scenarios (prime candidates to be part of a Global Earthing System), it is common that LV distribution scheme creates, through neutral conductors, an effective connection between grounding systems of MV/LV substations, modifying Global Earthing System consistency. Aim of this paper is to evaluate the effect, in terms of electrical safety, of the above mentioned LV neutral distribution scheme when an MV-side fault to ground occurs. At this purpose simulations are carried out on a realistic urban test case and suitable evaluation indexes are proposed.
Attenzione! Scheda prodotto non ancora validata
I metadati della pubblicazione sono in fase di verifica da parte dell'Ateneo
|Titolo:||Influence of LV neutral grounding on global Earthing Systems|
|Data di pubblicazione:||2015|
|Nome del convegno:||15th IEEE International Conference on Environment and Electrical Engineering, EEEIC 2015|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1109/EEEIC.2015.7165193|
|Appare nelle tipologie:||4.1 Contributo in Atti di convegno|