基于动态电弧模型的交流电弧炉三相不平衡分析与控制  

Analysis and Control of Three Phase Unbalance in AC Electric Arc Furnace Based on Dynamic Arc Model

作　　者：单春贤[1] 彭杰[1] 陈万家[1] 

机构地区：[1]江苏大学能源与动力工程学院,江苏镇江212013

出　　处：《铸造技术》2011年第2期234-238,共5页Foundry Technology

摘　　要：由于电弧炉三相电极之间的强耦合作用,使得调节系统对三相负载不平衡很敏感,常规单相控制方法容易出现失调过调。本文提出了基于阻抗补偿的解耦控制方法,通过电弧机理分析和辨识方法,建立了一种基于能量平衡动态电弧模型的电弧炉主电路模型,用作测试电极调节器调节性能的仿真电弧炉;在此模型基础上对三相负载不平衡时的电气特性进行仿真,以及三相之间阻抗耦合分析。最后建立了基于前馈补偿解耦控制电极调节系统的控制模型,并通过Matlab/Simulink对其调节性能进行仿真。仿真结果表明,带有前馈解耦控制器的电极调节系统,能很好地消除由三相耦合引起的互相扰动。Electrode regulator system is sensitive in the three phase unbalance by the coupling of the three phases,so it causes conventional single-phase controller maladjustment and repeated regulation.The control strategy with constant impedance with the feed-forward compensation was proposed to reduce three phase unbalance.First,the electric power system model was developed to test electrode regulator,which was based on the physical mechanism of arc and identification.Secondly,the electric characteristic of arc furnace was simulated in unbalance condition and coupling coefficient of the three phases was identified.Finally,the control system model based on the feed-forward compensation was constructed and simulated by Matlab/Simulink.The simulation results indicate that the decoupling controller with the feed-forward compensation can reduce the interactions better.

关 键 词：电弧炉 建模 三相不平衡 解耦控制 仿真 

分 类 号：TF345.5[冶金工程—冶金机械及自动化] TG232.3[金属学及工艺—铸造]