Abstract
It is pointed out that very fast electromagnetic transients caused by switching operations in gas insulated substations (GIS) cannot be calculated if conventional techniques of modeling and simulation are used. The selection and adjustment of the most suitable models as well as determinations of their limitations in digital simulations of very fast transients in GIS are investigated. Results obtained from very extensive field tests and from digital simulations for different types of GIS have been used for the development of more accurate models for GIS components and GIS as a whole. A comparison between field test and calculation results permits the development of a model which takes into account the most decisive physical phenomena inherent in the very fast transients in the GIS. This is a prerequisite for designing and manufacturing power system components as well as for control and protection of the system.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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