New assessment and prediction for arc furnace flicker

This investigation discussed the load characteristics of EAFs as determined by field measurement and found that the electrical characteristic of the EAF load doesn´t totally conform to the Gauss distribution probability mode. This paper suggest that the scaling factor-1.8, arrived at herein, is adopted to replace a traditional scaling factor-3.6 when doing the transformation between DeltaV_max and DeltaV_10max. The survey results max demonstrate that variations of active power and reactive power of EAFs are strongly alike. Meanwhile, an DeltaV₁₀ estimate must account for the effect of active power variation. This paper proposes the maximum complex apparent power fluctuation method to overcome the disadvantages of the traditional method. This revised method reduces the differences between the estimated voltage flicker and the surveyed value of the actual EAF operation. Restated, MAPFM can react to the actual voltage fluctuation during the operation of EAF. Furthermore, surveyed results reveal that the revised method can yield more accurate DeltaV₁₀ estimates than traditional method