SIMULATION RESULTS REGARDING ELECTRODES POSITION CONTROLLING ON ELECTRIC ARC FURNACE

The electric arc furnaces are a very large power load, determining the negative effects on the power quality (harmonics currents, unbalanced load, and reactive power). For a maximum efficiency of the power consumption it is necessary to use an automat system of electrodes position control, in order to obtain a high value of power factor. In this paper are present the simulation results of the electrodes position control on an UHP Electric Arc Furnace in an industrial plants. For simulation it was use an electric arc model, depending on the nonlinearity of the electric arc. The modelling approach adopted in the paper is graphical, as opposed to mathematical models embedded in code using a high-level computer language. The well-developed graphic facilities available in an industry standard power system package, namely PSCAD-EMTDC, are used to conduct all aspects of model implementation and to carry out extensive simulation studies.