说明：  利用matlab搭建的电弧炉模型，能够准确描述电弧炉的伏安特性曲线，对于分析电弧炉的用电特性有重要意义。
(Using MATLAB to build the model of electric arc furnace, can accurately describe the electric arc furnace characteristic curve, for the analysis of the electric characteristics of electric arc furnace has important significance.)