Guidelines for Altitude Correction of Pollution Performance of Insulators

Paris Session 2018

Tutorial

The tutorial is focused on analysis and harmonization of the correction factors for altitude while dimensioning AC and DC insulators operating in polluted environments. Most of the present data in CIGRE/IEC documents is based on findings from the 1970s and 1980s. At that time the research was mostly limited to altitudes of up to 2000 m and very few results were known for altitudes up to 3000 m. The lack of data was the main driving force for the present investigation performed by WG D1.44 established at the direct request of CIGRE/IEC. Another driving force was that different approaches and different formulae exist in the present IEC and CIGRE recommendations on how to consider altitude correction.