Abstract
Arc furnaces can be classified as electricity receivers, which largely affect the quality of electricity in the power system. Voltage fluctuations are the main disturbance generated by arc furnaces. The effects of voltage fluctuations include the phenomenon of flickering light. Apart from voltage fluctuations, arc devices, to a lesser extent, are the source of current and voltage asymmetry, voltage curve distortion, and voltage dips. The main purpose of theoretical considerations is to assess the voltage fluctuations generated by arc furnaces. The article presents a model of an arc device in which the arc has been replaced by a voltage whose value depends on the arc length. It presents also the results of the analysis of measurements of the parameters characterizing voltage fluctuations and flicker indicators.
Highlights
The article is a continuation of the issues of the impact of electric arc furnaces on the supply network presented in publication [20]
The main disturbances generated by arc devices are voltage fluctuations
Voltage fluctuations caused by arc furnaces are characterized by high dynamics of changes
Summary
The voltage fluctuations recorded in the networks supplying arc devices shows how disturbing arc furnaces are for the power quality—Figure 3. The article is a continuation of the issues of the impact of electric arc furnaces on the supply network presented in publication [20]. The article presents a proposal of the arc furnace model with a power supply network. The assessment of the parameters of the power supply network for arc furnaces based on the measurements of currents and voltages is presented in publication [23]. One can determine, among others, maximum values of voltage fluctuations that will occur for the given short-circuit power of the network and the power of the furnace transformer
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