Summary
Substation earthing system’s are commonly evaluated for a single scenario despite the reality that the variables driving earthing system’s performance are constantly changing. The behaviour of substation earthing systems is significantly influenced by the soil's electrical resistivity, particularly in the low-frequency range of 50 to 60 Hz. Soil resistivity is affected by various factors, including moisture content, chemical composition, and temperature. Soil temperature can be accurately forecasted, and thus considered for the earthing system design.
Read more Read lessThis paper explores the impact of seasonal temperature variations on soil resistivity and, consequently, on the performance of earthing systems. The study shows how simulations to predict grounding system behavior throughout the year can be performed, highlighting the hazardous impacts of seasonal variations, and provides guidance for considering moisture’s effects on soil resistivity.
Additional informations
| Publication type | Session Materials |
|---|---|
| Reference | B3_10748_2026 |
| Publication year | |
| Publisher | CIGRE |
| Country | United States of America |
| Study committees | |
| File size | 2 MB |
| Price for non member | 30 € |
| Price for member | 30 € |
Authors
LEWIS David - Bentley Systems, United States of America; ANDOLFATO Roberto - SINT srl, Italy; CUCCAROLLO Daniele - SINT srl, Italy
Keywords
Substation Earthing - Touch and Step Voltages - Soil Freezing - Seasonal Earthing Performance
