Summary
This paper presents a novel approach to the assessment of icing and extreme weather loads on high-voltage transmission lines by integrating field measurement with high-resolution atmospheric modelling. The methodology is demonstrated through the construction of a new 420 kV overhead line across a mountainous corridor in Norway in an area previously affected by tower collapses due to the combination of extreme icing and high wind speeds.
Read more Read lessThe paper presents:
• Continuous icing measurements across multiple spans • Validation of tower load cases against real-world data • Calibration of meteorological and icing models used in OHL design • An improved understanding of variations of climatic loads along line routes, including conductor galloping. In summary, this work demonstrates how innovative sensor integration on newly constructed lines can yield valuable long-term datasets, refine existing design models, and ultimately support more resilient infrastructure planning in a changing climate.
Additional informations
| Publication type | Session Materials |
|---|---|
| Reference | B2_11873_2026 |
| Publication year | |
| Publisher | CIGRE |
| Country | Norway |
| Study committees | |
| File size | 1 MB |
| Price for non member | 30 € |
| Price for member | 30 € |
Authors
NYGAARD Bjørn Egil - Norconsult; INGVALDSEN Kristian - Norconsult; ADUM Boris - Statnett; HAGEN Peder Andreas - Statnett
Keywords
Icing, Design loads, Load cases, Icing sensors, Real-time monitoring, Galloping, Weather modelling, Climatology
