Optimal free-burning AC arc model selection for electromagnetic transients in power systems

Abstract

This paper provides a review of two different mathematical arc models. The first one is based on the arc diameter variation, the second one is defined as cylindrically-symmetric channel model of a vertical arc with a variable radius. The arc model based on the arc diameter was introduced for high current setup, while the channel model was implemented in software for low current experiment. Both models performed well, and the simulated curves matched with the experimental data taken as a basis. However, the model considering the arc diameter impact on its conductance requires additional parameters that should be estimated using measured data. In contrast, the channel model does not impose the use of such parameters, which makes it more flexible.