Summary

Recent developments in UHV substations renewed the importance of the very fast transient overvoltage (VFTO) analyses, which became a design factor for such UHV levels. VFTO are of greater concern at the highest rated voltages. Beside a detailed description of the state-of-the-art of science and technology the TB presents an insulation co-ordination approach dealing with VFTO. Technical information is given about VFTO simulation, determination of required withstand voltages, mitigation measures and special test requirements.

Additional informations

Publication type Technical Brochures
Reference 519
Publication year 2012
Publisher CIGRE
Study committees Materials and emerging test techniques (D1)
Working groups WG D1.03
File size 1 MB
Pages number 32
Price for non member 70 €
Price for member Free
Very Fast Transient Overvoltages (VFTO) in Gas-Insulated UHV Substations
Very Fast Transient Overvoltages (VFTO) in Gas-Insulated UHV Substations