Intelligent controller of electric furnace electrode

Abstract

The invention relates to an intelligent controller of an electric furnace electrode. A plurality of digital / analog input and output channel modules are spliced with a single-board computer, and exterior terminals of the modules are connected with an electric furnace electrode unlocking operation switch, an elevating operation switch, a control valve of a locking device, a control valve of an elevating device, an upper and a lower space-limiting switches of a furnace cover, a manual / automatic switching switch, a current and voltage detection end, a current setting potentiometer, a transformer reactor shift and a fault comprehensive signal of an electric furnace control system. The electrode adjusting calculation method consists of an automatic arcing algorithm of equal arcing distance, a window current integrator overcurrent control algorithm, and a near reverse internal model control method based on a LSSVM-NARMA model. The electrode adjusting algorithm also comprises a PID control method, provides modeling data for the reverse internal model control method, is an alternative control method, and has the characteristic of quick and accurate electrode adjustment. The invention can significantly shorten the smelting period, save the electric energy, reduce the energy consumption, and is suitable for organizations of electric furnace smelting, and the like.

Description

technical field [0001] The invention relates to a controller, in particular to an intelligent internal model inverse control method and an integrated control device for electric furnace steelmaking. Background technique [0002] In recent years, electric arc furnace steelmaking has become one of the main steelmaking methods. The electrode lifting adjustment system is an important part of the electric arc furnace, and its working effect directly affects the output, quality and energy consumption of steel. Therefore, it is of great significance for iron and steel production to find a simple and effective method to make the electrode adjustment system have better performance in the smelting process. The electrode regulation system is a time-varying system with multivariable, nonlinear and strong coupling, and the random interference is very serious. PID control is mainly used in practical industrial processes. PID control has a simple structure, is easy to implement and has g...

AI Technical Summary

Problems solved by technology

At present, the PLC control design scheme of the whole furnace is generally adopted at home and abroad, which limits the development of electric furnace control technology, and some advanced control methods are difficult to be flexibly used on PLC, especially as the core part of electric furnace control-the electrode lifting control has no special products. , in order to improve the control level of the electric furnace, make it standardized and universal, it is necessary to design a special electric furnace electrode lifting controller

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