Harmonics and Voltage flicker investigation of different Electric Arc Furnace models on Power Systems

Power quality disturbances, such as voltage flicker and harmonic distortions, are introduced to the utility power system due to the stochastic and nonlinear operation of an electric arc furnace. In order to analyze the voltage flicker and harmonic distortions produced by furnace operation, precise models of electric arc furnaces are necessary. In this paper, the PQ issues in utility power systems that supply an arc furnace load are examined using a variety of arc furnace models, limit curves, and manual calculation techniques. Classification of models typically relies on the time domain and frequency domain methods. For the purpose of analyzing flicker and harmonic content, ten models of an arc furnace selected using the time domain method are analyzed. Simulations are conducted, and the results obtained are utilized to compare the various arc furnace models in terms of voltage flicker and harmonic content. Recommendations pertaining to the practical implementation of these models are also provided.