Modeling of Voltage Fluctuations Generated by Arc Furnaces

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 The article presents a model of an arc device in which the arc has been replaced by a voltage whose value depends on the arc length.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.

Evaluation of Flicker of Light Generated by Arc Furnaces

“…The continuation of the research conducted by A. W ąsowski was presented in publications [13,14,45].…”

“…In the method recommended by UIE, an increase of flicker caused by consecutive connecting arc devices is determined by the change of the coefficient m from value of 2 to 4 in Formula (14). For identical furnaces causing identical flicker (Pst1 = Pst2 =… = Pstn), Formula ( 14) can be transformed to the form: 𝑃 st = 𝑃 st + 𝑃 st + ... + 𝑃 st = 𝑁 ⋅ 𝑃 st1 = √𝑁 𝑃 st1 (20) At bordering values m = 2 and m = 4 recommended by UIE, this leads to the formula for KN:…”

“…Analysis of the impact of the short-circuit power in the nodes to which the consumers are connected on the magnitude of voltage fluctuations was carried out. The voltage fluctuations and flicker of light generated mainly by arc furnaces were discussed in [10][11][12][13][14]. Issues concerning the effectiveness of the devices reducing voltage fluctuations and flicker of light in the lines supplying arc furnaces are presented in publications [15][16][17][18][19][20][21].…”

Arc Voltage Distortion as a Source of Higher Harmonics Generated by Electric Arc Furnaces

“…The present article is a continuation of the issues concerning the impact of electric arc furnaces on the power system, described by the author in [31][32][33][34]. In [32,33], voltage fluctuations generated by arc furnaces were characterized in detail.…”

Electric Arc Furnaces as a Cause of Current and Voltage Asymmetry

“…The article presents issues related to current and voltage asymmetry caused by arc furnaces. The publication is a continuation of the series of articles [32][33][34] presenting the impact of electric arc furnaces on the power system.…”