The electric arc furnace is a three-phase load representing one of the most important generator of harmonic currents, reactive power and unbalanced conditions in electrical power systems. This paper aims to achieve a study concerning the power quality of the energy at 3-phase electric arc furnaces. There are analyzed the main qualitative indicators of the electric power: power factor, reactive factor, distorting factor and the total harmonic distortion for current and voltage to a 100 t EAF from an industrial platform. There are also study the modeling of a three phase electric arc furnace installation. Thus, for modeling his behavior, it was used a model which parameters like of a real electric arc. The simulations results are comparing with the measurements.

Keywords: Power quality, Electromagnetic pollution, Harmonics, Electric arc furnace (EAF), Electric arc modeling.