Coordinator: Alf-Peter Elg

Methods for lightning impulse (LI) voltage calibration for testing of ultra-high voltage (UHV) equipment are researched and recommended, with the target of providing new input to IEC 60060-2 for time parameters and voltage measurement on ultra-high voltage above 2500 kV, with uncertainty for peak voltage better than 1 %. It is further to resolve unexplained effects on measurements from front oscillations, corona, proximity and signal cables. This project builds on results of the EMPIR ElPow project, extending the 1500 kV voltage level capability achieved in ElPow to up to 3500 kV,  

The effects that impact LI measurement accuracy are evaluated and best practices for extrapolation to ultra-high voltage levels up to 3500 kV proposed. Based on that, transportable LI measurement systems are modified and characterised. Finally, a measurement campaign is set up at a 4000 kV LI facility to validate the approaches taken throughout the project.  

For more information, see the project webpage >>