アーク炉操業時の電気諸量の計測演算

概要

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During a steelmaking arc furnace operation, wave forms of the voltage and current respectively are usually distorted considerably and undergo irregular changes from time to time.In this study, relevant kinds of arc furnace power were analyzed based on these wave forms of phase voltage and current by utilizing computer technology.Authors have developed a digitalized measuring device for the pourpose of more accurate quantitative measurement of the electrical characteristic values based on physical definition applied to the distorted waves, and tested.The results obtained are as follows:(1) Value of apparent power obtained by product of root-mean-square voltage and root-mean-square current is considerably larger than the power obtained by root-sum-square of active power and reactive one for the corresponding period.The fact seems to lead us into confusion for evaluation of power factor and/or apparent reactance of arc furnaces under operation.(2) For accurate measuring of electrical chracteristic values on arc furnace operation, a computerized measuring device is most suitable.
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