Design of the Improved Electrical and Technological Modes Control Algorithms for Various Classes of EAFs

The article presents the results of theoretical and experimental research on the development and improved algorithms and automatic control systems implementation for existing metallurgical furnaces, such as electric arc furnaces (EAFs) and ladle furnaces (LF) electrical modes, which are based on the use of information about higher harmonics of voltages and currents of electric arcs. The use of these algorithms and control systems provides an improvement in the time, energy and technological performance of the EAF and LF. It became possible due to the units electrical modes dynamic adaptation, determined by the on-load tap-changer stage of the furnace transformer and additional reactor (if any), as well as the number of the operating curve in the process of melting the metal charge in Chipboard or out-of-furnace processing of liquid steel in LF. Also, the paper presents the results of the usage of improved control system algorithms implemented in the existing EAF and LF of various classes and capacities operating at metallurgical enterprises.