用于低频非平稳间谐波研究的超高功率电弧炉模型  

An Ultra-high-power Electric Arc Furnace Model for Low-Frequency Non-stationary Inter-harmonics Studies

作　　者：林才华 张逸[1] 邵振国[1] 林芳 黄道姗 林焱 LIN Caihua;ZHANG Yi;SHAO Zhenguo;LIN Fang;HUANG Daoshan;LIN Yan(College of Electrical Engineering and Automation,Fuzhou University,Fuzhou 350108,China;Fujian Provincial Electric Power Company Limited Electric Power Research Institute,Fuzhou 350007,China)

机构地区：[1]福州大学电气工程与自动化学院,福建福州350108 [2]国网福建省电力有限公司电力科学研究院,福建福州350007

出　　处：《中国电力》2020年第11期1-8,共8页Electric Power

基　　金：国家自然科学基金资助项目(高渗透率分布式新能源发电接入下的电网谐波不确定性交互影响机理研究,51777035);国家电网有限公司总部科技项目(配电网低频非平稳间谐波防治关键技术研究及应用,5400201921142A0000)。

摘　　要：超高功率电弧炉是现代冶炼的主要设备,但其所产生的低频非平稳间谐波和大功率冲击会严重影响配电网的电能质量。超高功率电弧炉的精确建模对深入理解电弧的时变性和非线性以及实现电能质量问题的针对性研究具有重要的意义。针对现有模型尚未考虑低频非平稳间谐波发射特性的问题,建立了新型的超高功率电弧炉模型。首先,根据能量守恒定律建立电弧静态方程,并结合混沌理论建立超高功率电弧炉的动态数学模型;然后,运用遗传蚁群算法实现动态数学模型的参数辨识;最后,以福建某100吨交流电弧炉作为研究对象,在Matlab/Simulink环境下,验证模型的可行性和正确性。仿真结果表明,提出的模型能较准确地体现超高功率电弧炉实际运行过程中的特性,能用于超高功率电弧炉低频非平稳间谐波发射特性的研究。Ultra-high-power electric arc furnace is the main equipment of modern smelting,but its low-frequency non-stationary inter-harmonics and high-power impact will seriously affect the power quality of distribution networks.The accurate modeling of ultra-high-power electric arc furnace is of great significance to understand the time-varying and non-linear characteristics of the arc and to conduct the targeted research on power quality issues.Aiming at the problem that the existing models have not considered the low-frequency non-stationary inter-harmonic emission characteristics,a novel ultra-high power electric arc furnace model is established.Firstly,a static arc equation is established according to the law of conservation of energy,and a dynamic mathematical model is constructed for the ultra-high-power electric arc furnace using chaos theory.Then,the genetic ant colony algorithm is used to identify the parameters of the dynamic mathematical model.Finally,a 100 t AC electric arc furnace in Fujian was used for case study,and the feasibility of the proposed model was verified under Matlab/Simulink environment.The simulation results show that the proposed model can better describe the operating characteristics of the ultra-high-power electric arc furnace,and can be used for study of the low-frequency non-stationary inter-harmonic emission characteristics of the ultra-high-power electric arc furnace.

关 键 词：超高功率电弧炉 低频非平稳间谐波 数学模型 仿真模型 发射特性 

分 类 号：TM924.4[电气工程—电力电子与电力传动]