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RESEARCH PRODUCT
Influence of LV neutral grounding on global earthing systems
Gaetano ZizzoE. MorozovaRoberto NapoliGiovanni ValtortaEnrico PonsF. TummolilloRiccardo TommasiniPietro ColellaA. BarresiLuigi MartiranoFrancesco TorelliGiuseppe PariseLuigi ParisePasquale MontegiglioM. L. Di SilvestreG. CafaroA. De SimoneE. Riva Sanseverinosubject
Engineeringelectrical and electronic engineeringmaxwell subareas method020209 energyEnergy Engineering and Power TechnologyGround and neutralindustrial and manufacturing engineering02 engineering and technologyRegulatory authorityGlobal earthing system (GES) global grounding system (GGS) ground potential LV neutral conductor maxwell subareas method.control and systems engineeringlv neutral conductorShield0202 electrical engineering electronic engineering information engineeringglobal earthing systemmaxwell sub-areas methodGlobal earthing system (GES)Electrical conductorglobal grounding system (GGS)Groundbusiness.industryGES; GGS; global earthing system; global grounding system; ground potential; lv neutral conductor; maxwell sub-areas method; control and systems engineering; industrial and manufacturing engineering; electrical and electronic engineeringElectrical engineeringGlobal Earting SystemGESglobal grounding systemground potentialEarthing systemGGSGlobal earthing system (GES); global grounding system (GGS); ground potential; LV neutral conductor; maxwell subareas method; Control and Systems Engineering; Industrial and Manufacturing Engineering; Electrical and Electronic EngineeringSettore ING-IND/33 - Sistemi Elettrici Per L'EnergiaSettore ING-IND/31 - ElettrotecnicaGlobal Earting System; GES; Global Grounding System; GGS; Ground potential; Maxwell Sub-areas Method; LV neutral conductorHigh loadElectricityGES; GGS; Global earting system; global grounding system; ground potential; lv neutral conductor; maxwell sub-areas method; electrical and electronic engineering; energy engineering and power technologybusinessdescription
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. The aim of this paper is to evaluate the effect, in terms of electrical safety, of the aforementioned LV neutral distribution scheme when an MV-side fault to ground occurs. For this purpose, simulations are carried out on a realistic urban test case and suitable evaluation indexes are proposed.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-01-01 |