Modelling and identification of electrode position controller in electric arc furnace

Electrode position controller in electric arc furnace systems plays an important role in the steel-making process by which a reference arc impedance or arc current is maintained to guarantee steady power input to the steel in the furnace. Modelling and identification of the electrode position controller is a prerequisite for realization of its direct digital control. In this paper, detailed physical analysis of the arc characteristic in electric arc furnace is given, and a model of electric arc furnace electrode controller for one phase is proposed. An identification strategy is then presented to deal with the model´s identification problem