感应熔炼炉运行动力学及其对电网电能质量的影响

D. Choudhary, C. Kotwal
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引用次数: 1

摘要

感应熔炼炉(IMF)在钢铁厂用于熔化金属废料和各种合金。对IMF的需求很大,并逐渐成为钢铁厂的主要资助者。在钢铁厂和铸造厂,IMF的完整熔化周期包括各个阶段,如废料倒入炉中,熔化,精炼,合金添加,然后保持,然后浇注熔融金属进行进一步的铸造工艺。在此过程中,国际货币基金组织电源变换器开关系统的电气参数会发生变化,从而影响电网供电质量。本文通过对熔炼过程各阶段的供电电流、电压和逆变器电流进行谐波分析,论证了IMF系统的特征谐波和非特征谐波对电网供电质量的影响。在模拟和现场实测数据的基础上,研究了基金组织运行时的动载特性。模拟结果与实际工作的IMF系统在钢厂的试验结果进行了对比。仿真结果与实验结果吻合较好,突出了实验工作的重要性,对谐波抑制系统的设计具有指导意义
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Operational Dynamics of Induction Melting Furnace and its Effect on Power Quality of Grid
Induction melting furnaces (IMF) are used in steel plants for the melting of metallic scrap and various alloys. The IMF is well in demand and gradually becoming a major contributor in steel plants. In steel plants and foundries, the complete melting cycle of the IMF consists of various stages like scrap charging into the furnace, melting, refining, alloy addition and then holding it before pouring of molten metal for further process of casting. During all these processes, the electrical parameters of the power converter switching system of the IMF get change which affects the power quality of the grid supply. In this paper, the effect of characteristic and uncharacteristic harmonics of the IMF system on the power quality of grid supply is demonstrated by performing harmonic analysis of supply current, voltage and inverter current for the various stages of the melting process. Dynamic load behavior of the operation of IMF has been investigated based on simulation and practical field data results. Simulated results are verified against experimental field result of trials conducted on the actual working IMF system in the steel plant. The close agreement between the simulated and the experimental results, highlights the experimental work and may be helpful for designing of harmonic mitigation systems
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