A New Electrode Regulator System Identification of Arc Furnace Based on Time-Variant Nonlinear-Linear- Nonlinear Model

In this paper, we express arc furnace electrode regulator system as a time-variant nonlinearlinear-nonlinear model. On this basis, we propose an online identification method based on nonlinearlinear-nonlinear model system. This new scheme solves the problem of model variation and prediction precision decline causing by time-varying of arc characteristic. In order to dispose the difficulty of parameters separation in the online identification process, this new method adopts the mind of update the parameters of linear parts and nonlinear parts respectively. It realizes the parameters separation of system effectively. Simulation results show that this method can track the changes of arc characteristics effectively. That it achieves the aim of real-time monitoring and controlling system parameters.