The Electrical Parameters Design of EAF Voltage Fluctuation Suppression

In order to solve the problem of voltage fluctuations caused by reactive power consumption and fluctuation range of reactive current in ultra-high power electric arc furnace, the high impedance is used in ultra-high power electric arc furnace system, and it gives the relationship between the arc electrical parameters (series reactance, the transformer voltage, power factor, arc resistance, etc.) under the conditions of constant arc power, also, the mathematical model of change rate of the reactive power fluctuation is established. Here, the 40t electric arc furnace is given as an example to verify the results. The results show that the high impedance can reduce the energy consumption and the capacity of reactive compensation devices, improve the arc stability and reduce the voltage flicker.