TY - GEN
T1 - On the Impact of Soil Resistivity Measurement and Modelling on Grounding Performance
AU - Kherif, O.
AU - Robson, S.
AU - Harid, N.
AU - Thorpe, D.
AU - Stivanello, S.
AU - Haddad, A.
N1 - Funding Information:
ACKNOWLEDGMENT The authors would like to acknowledge the funding provided by UKRI through Innovate UK for the KTP Project involving Kingsmill Industries (UK) Limited and Cardiff University.
Publisher Copyright:
© 2022 IEEE.
PY - 2022
Y1 - 2022
N2 - This study highlights the heterogeneity impact of fields on the grounding system modelling and the uncertainty of soil resistivity measurements/models caused by this reason. Using Wenner method, six sounding profiles are considered over a square shape area within the same site. Test arrangements and associated results, including soil equivalent models, are presented in order to discuss the soil heterogeneity aspect. The impact of this latter on grounding modelling is determined by simulations over a wide range of frequencies using HIFREQ module of CDEGS software. The results show that soil resistivity measured results can be different with respect to the selected profile, providing different equivalent models of the same soil. Grounding modelling process is affected by this variety of models in a dependent manner with the frequency range of the injected current. Additional analyses are also considered for a second site in a different location. The same conclusions are obtained-arbitrary selection of survey profile and/or soil equivalent model may significantly influence the grounding design, affecting the associated protective systems. Such findings lead to extending relevant standards to cover this aspect, especially for large-scale ground networks or grounding systems for surge arresters.
AB - This study highlights the heterogeneity impact of fields on the grounding system modelling and the uncertainty of soil resistivity measurements/models caused by this reason. Using Wenner method, six sounding profiles are considered over a square shape area within the same site. Test arrangements and associated results, including soil equivalent models, are presented in order to discuss the soil heterogeneity aspect. The impact of this latter on grounding modelling is determined by simulations over a wide range of frequencies using HIFREQ module of CDEGS software. The results show that soil resistivity measured results can be different with respect to the selected profile, providing different equivalent models of the same soil. Grounding modelling process is affected by this variety of models in a dependent manner with the frequency range of the injected current. Additional analyses are also considered for a second site in a different location. The same conclusions are obtained-arbitrary selection of survey profile and/or soil equivalent model may significantly influence the grounding design, affecting the associated protective systems. Such findings lead to extending relevant standards to cover this aspect, especially for large-scale ground networks or grounding systems for surge arresters.
UR - http://www.scopus.com/inward/record.url?scp=85143079411&partnerID=8YFLogxK
U2 - 10.1109/ICLP56858.2022.9942653
DO - 10.1109/ICLP56858.2022.9942653
M3 - Conference contribution
AN - SCOPUS:85143079411
T3 - ICLP 2022 - 36th International Conference on Lightning Protection
SP - 379
EP - 382
BT - ICLP 2022 - 36th International Conference on Lightning Protection
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 36th International Conference on Lightning Protection, ICLP 2022
Y2 - 2 October 2022 through 7 October 2022
ER -