电弧炉间谐波在配电网中的谐振评估与传播分析  

Resonance evaluation and propagation analysis of electric arc furnace inter-harmonics in distribution network

作　　者：林焱 刘开培[2] 彭雅洁 黄道姗 林芳 秦亮[2] LIN Yan;LIU Kaipei;PENG Yajie;HUANG Daoshan;LIN Fang;QIN Liang(Electric Power Research Institute,State Grid Fujian Electric Power Co.,Ltd.,Fuzhou 350007,China;School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,China)

机构地区：[1]国网福建省电力有限公司电力科学研究院,福建福州350007 [2]武汉大学电气与自动化学院,湖北武汉430072

出　　处：《武汉大学学报（工学版）》2024年第5期628-636,共9页Engineering Journal of Wuhan University

基　　金：国家电网公司总部科技项目(编号:5400-201921142A-0-0-00)。

摘　　要：电弧炉类非线性负荷常常会在0.1~5次频段范围内产生间谐波,给配电网带来并联谐振风险,严重威胁配电网的电能质量和安全稳定运行。建立了适用于非平稳间谐波研究的电弧炉负荷数学模型,基于模态分析法确定了配电网发生并联谐振的频率和中心节点,结合模态阻抗灵敏度分析法评估配电网线路元件对谐振的影响,采用电压传递系数量化间谐波源接入不同位置后在其他网络节点上的放大程度,并基于Sobol全局灵敏度分析方法评估了负荷变化对电压放大强度的影响,最后在Matlab2021a中建立了9节点配电网模型,研究验证了电弧炉间谐波在配电网中的谐振与传播情况。The non-linear load of electric arc furnace class often generates inter-harmonics in the frequency bands of 0.1-5,which brings the risk of parallel resonance to the distribution network and seriously endangers the power quality and safe and stable operation of the distribution network.This paper establishes a mathematical model of arc furnace load applicable to the study of non-smooth inter-harmonics,determines the frequency and central node of the distribution network where parallel resonance occurs based on the modal analysis method,and evaluates the effect of distribution network line elements on resonance by using the modal impedance sensitivity analysis method.The degree of amplification of inter-harmonic sources on other network nodes after connecting to different locations is quantified by using voltage transfer coefficients,and the effect of load changes on the voltage amplification intensity is evaluated based on the Sobol global sensitivity analysis method.Finally,a 9-node distribution network model is established in Matlab2021a to study and verify the resonance and propagation of inter-harmonics of electric arc furnace in the distribution network.

关 键 词：电弧炉 间谐波 并联谐振 模态分析 灵敏度分析 

分 类 号：TM74[电气工程—电力系统及自动化]