Electric arc furnace (EAF) dust, together with a mill scale and coke were smelted in a laboratory electric arc furnace. These metallurgical wastes consist of a many different phases and elements, making the reaction process complex. Thermo-chemical analysis of the reactions in metal, slag, and gas phases was done, and used for modeling of the mixture composition and energy consumption required ...

This paper proposes an on-line neural network based Distributed Static Compensator (DSTATCOM) for a three-phase, three-wire grid connected distribution system to mitigate the voltage flicker. The technique is based on instantaneous tracking of the voltage envelope and phase angle using online neural network based estimator. These estimated values are used by neural controllers to compute inputs...

During its melt cycle, an arc furnace causes disturbances of the electrical supply. Existing measurement techniques for this application lead to corrective rather than predictive compensation. The use of neural networks to control the compensation is being considered, in particular reinforcement learning strategies which require no pre-training and which can adapt to a dynamically changing envi...

The author shows that the use of high-resolution spectrum estimation methods instead of Fourier-based techniques can improve the accuracy of measurement of spectral parameters of distorted waveforms encountered in power systems, in particular the estimation of the power quality indices (such as inter/harmonic groups and subgroups). The comparison of the frequency and amplitude estimation error,...

The rapid increase of non-linear loads in the last three decades has caused electrical quantities such as voltages and currents in 3-phase distribution systems to become distorted waveforms. This paper reviews, explains and discusses some new concepts, definitions and new available theory in the unbalanced and distorted systems. The usefulness of the proposed practical definitions is investigat...

The article describes measurement of currents and voltages in submerged arc-resistance electric furnace which were done to identify arc parameters. Waveforms of registered currents and voltages have been shown. Characteristics of arc developed in original C# software have been presented. Streszczenie. Artykuł opisuje pomiary prądów i napięć w obwodzie pieca elektrycznego łukowo-oporowego z łuki...

A system for arc steel melting furnace arcs power control with fuzzy corrector is proposed. Digital model of the system was created and numerical simulation under influence of deterministic and random disturbances of arc lengths were conducted. Results of simulations are shown, which prove improvements of dynamic and static indices of arc power regulation. Streszczenie. Praca przedstawia system...

This paper presents guidelines for the accurate evaluation of harmonics and flicker generated by ac electric arc furnaces, and its propagation through transmission and distribution systems. It is presented a typical case where a HV system supplies a high capacity arc furnace. The electrical network is simulated using the ATP version of the EMTP where a non-linear time-varying three-phase arc mo...

For three-phase six-electrode submerged-arc furnaces, a technical solution has been proposed that allows to determine the contour of an electrode with arc discharge by analyzing harmonic spectrum offset voltage zero point, created artificially. Researches carried out on industrial furnace which melts ferronickel, have confirmed possibility using method for monitoring and controlling operating m...