6533b829fe1ef96bd128a536
RESEARCH PRODUCT
Lightning-current distribution in MV grids interconnected earthing systems
Gaetano ZizzoGuido AlaG. GigliaElisa Francomanosubject
EngineeringEnvironmental Engineering020209 energyEnergy Engineering and Power TechnologyShields02 engineering and technologyLightning arresterLightningIndustrial and Manufacturing EngineeringEarthing systemSettore MAT/08 - Analisi Numerica0202 electrical engineering electronic engineering information engineeringElectronic engineeringElectrical and Electronic EngineeringInterconnectionBondingEarth potential risebusiness.industryElectrical engineeringGridEarthing systemLightningSettore ING-IND/33 - Sistemi Elettrici Per L'EnergiaSettore ING-IND/31 - ElettrotecnicabusinessGlobal Earthing SystemVoltagedescription
The paper presents first investigations results on the effects of lightning stroke on medium voltage (MV) installations' earthing systems, connected together with the metal shields of the MV distribution grid cables. The study enables to evaluate the distribution of the lightning current among interconnected earth electrodes in order to assess if the interconnection, usually done for reducing earth potential rise during an earth fault, can give place to dangerous situations far from the installation hit by the lightning stroke. Two case studies of direct lightning stroke are presented and discussed: two interconnected MV substations of the MV grid; a high voltage/medium voltage (HV/MV) station connected with a MV substation.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-06-01 | 2017 IEEE International Conference on Environment and Electrical Engineering and 2017 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe) |