3D magnetohydrodynamic modeling of DC arc in power system

摘要

With the rise of large-scale photovoltaic arrays and DC buses in power systems, DC arc hazards have raised great concerns. Currently, the IEEE Std. 1584-2002 pertains to arc flashes originating in only AC systems. Little research has been conducted to investiage the theoretical or semi-empirical methods to estimate DC arcs. The theoretical method, based on the maximum power transfer theorem, produces results that are too conservative; the semi-empirical methods are limited by the experiment scale, which cannot provide comprehensive DC arc prediction to the industry. This paper presents a magnetohydrodynamic (MHD) model of DC arcs. The MHD equations are solved by using computational fluid dynamic (CFD) software Code Saturne??, which is based on collocated finite volume. The simulation results are compatible with the lab testing. The proposed MHD modeling provides an innovative approach to study DC arc phenomena.