Advanced Technology to Ensure EAF Grid Flicker Compliance

Electrical Arc Furnace, as one of the most severe loads to be connected to electrical system, is contributing significantly to voltage flicker phenomena on distribution and transmission system level. Despite many known technologies to mitigate EAF induced voltage flicker, in many cases there are still discrepancies between planned and measured voltage flicker level after implementation, which is creating problems with grid code compliance. This paper is showing a novel approach to successfully overcome this problem in any grid. This approach is taking into account all components contributing to voltage flicker. The case is supported by practical measurement results on a high power 30 MVA, 33 kV EAF.