摘要
为了表征电弧炉在运行过程中能量耗散的物理特性,实现供电系统与冶炼设备组成的多学科系统的混合仿真,宏模型采用了电弧炉电弧功率关系的非线性微分方程,及描写电弧炉时域响应中低频不确定信号的非线性微分方程组,将它们分别表示为含有线性时不变元件和多维、高阶、非线性受控源的电路模型,电弧电压信号与低频混沌信号进行调制后,最终得到的电弧炉输出电压将具有电压谐波和电压闪变等特性。该模型的参数均可在仿真时调整或在选定范围内进行连续仿真,满足了各类电弧炉在冶炼的不同阶段建模的实际需要。文中以电弧炉精炼期为例进行仿真的结果表明,使用本文所提出电弧炉电路宏模型能对电弧炉系统进行切合实际的时域分析,仿真结果能为预测电弧炉对电能质量的污染提供可靠的数据。
In the proposed macro-model, two sub-circuits are integrated, one simulating the differential equation representing the general dynamics of electric arc and producing the arc voltage under a deterministic input current, another generating a low frequency chaotic signal. The macro-model behaving as a dependent voltage source provides finally an arc furnace voltage formed by modulating the arc voltage and the low frequency chaotic signal. A software prototype implementing the model has been developed. The refining stage event is taken as an example for illustrating the modeling and simulating issues. It is concluded that the proposed model is feasible and promising for practical applications to detection of the power quality.
出处
《四川大学学报（工程科学版）》
EI
CAS
CSCD
北大核心
2005年第1期85-89,共5页
Journal of Sichuan University (Engineering Science Edition)
关键词
电弧炉
电路宏模型
电路时域分析
动态特性
电能质量
Chaos theory
Differential equations
Mathematical models
Software prototyping
Time domain analysis
