超高功率电弧炉变压器和电抗器技术参数设计

Technical Parameter Design of Transformer and Reactor for Ultra-high Power Electric Arc Furnace

电弧炉变压器主要作用是降低供电电压,产生大电流,在保证供电效率的情况下,适应电弧炉冶炼所需的电弧弧长,保证电弧炉冶炼过程的安全性。同时提供不同挡位的电压和电流,以满足冶炼过程需要。电抗器主要作用是增加线路的无功功率,降低短路电流和功率因数,稳定电弧燃烧。同时提供不同挡位的电抗,以满足冶炼过程不同工况的需要。变压器和电抗器技术参数的合理设计是保证电弧炉稳定冶炼的关键,依据电弧炉所需的冶炼效率及出钢量,系统分析电弧炉变压器和电抗器参数的设计原理。从分析可知,变压器的容量是基于电弧炉的通电时间及出钢量进行确定,而变压器的二次电压、额定电流及电抗器容量等参数是基于电弧冶炼稳定性的约束条件进行计算。计算结果与JB/T 9640-2014参考值进行对比分析,结果匹配度较好。

The main function of an arc furnace transformer is to reduce the power supply voltage,generate large currents,and adapt to the arc length required for arc furnace smelting while ensuring power supply efficiency,ensuring the safety of the arc furnace smelting process.At the same time,it provides voltage and current at different levels to meet the needs of the smelting process.The main function of a reactor is to increase the reactive power of the line,reduce short-circuit current and power factor,and stabilize arc combustion.At the same time,it provides reactance at different levels to meet the needs of dfferent working conditions in the smelting process.The reasonable design of technical parameters of transformers and reactors is the key to ensuring stable smelting of the arc furnace.Reasonable design of transformer and reactor technical parameters is the key to ensure the stability of EAF smelting.Based on the smelting efficiency and tapping capacity required by EAF,it systematically analyzes the design principle of transformer and reactor parameters of EAF.From the analysis,it can be seen that the transformer capacity is determined based on the electrifying time and tapping capacity of electric arc furnace,while the parameters of transformer such as secondary voltage,rated current and reactor capacity are calculated based on the constraint conditions of the stability of arc.The calculated results are compared with the reference values of JB/T9640-2014,and the results are well matched.