摘要
为了深入理解架空线雷电感应电压特性为配电网雷电防护提供技术参考,本文采用时域有限差分法及Agrawal耦合模型对10 kV架空配电线路雷电感应电压进行了数值计算.以解析计算方法中导线高度、回击电流幅值以及落雷距离3个特征参数为考察对象,分析了三者对架空线雷电感应电压的影响,实现了对解析计算公式计算精度的定量化分析.计算表明,雷电感应电压脉冲幅值随导线高度和回击电流幅值增大均线性提高,随落雷距离减小非线性提高.受水平电场特性及导线相互作用的影响,落雷距离减小和导线数增多均会显著加重雷电感应电压波形的畸变.以数值计算为标准,解析算法误差可高达45%;0%,本文研究结果可为配电网运维工作提供理论参考.
In order to deeply understand the lightning induced voltage characteristics of overhead lines and provide technical reference for lightning protection of distribution network,the lightning induced voltages of 10 kV overhead distribution lines were calculated by using the finite difference time domain method and Agrawal coupling model.Taking the three characteristic parameters of conductor height,return-stroke current amplitude and return-stroke distance in the analytical calculation method as the investigation objects,the effects of the three parameters on lightning induced voltage of overhead lines were analyzed.The quantitative analysis of the calculation accuracy of the analytical calculation formula was realized in this paper.The results show that,the lightning induced voltage pulse amplitude increases with the increase of conductor height and return-stroke current amplitude,and increases nonlinearly with the decrease of return-stroke distance.Affected by the characteristics of horizontal electric field and the interactions of conductors,the reduction of return-stroke distance and the increase of the number of conductors will significantly aggravate the distortion of lightning induced voltage waveforms.Taking the numerical calculation as the standard,the error of the analytical algorithm can be as high as45%~50%.The results of this paper can provide theoretical reference for the operation and maintenance of distribution network.
作者
于建立
张迎栋
程龙
鲁志伟
YU Jian-li;ZHANG Ying-dong;CHENG Long;LU Zhi-wei(School of Mechanical and Automation,Weifang University,Weifang Shandong 261061,China;Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology,Ministry of Education(Northeast Electric Power University),Jilin Jilin 132012,China;School of Electrical Engineering and Automation,Wuhan University,Wuhan Hubei 430072,China)
出处
《控制理论与应用》
EI
CAS
CSCD
北大核心
2022年第5期941-949,共9页
Control Theory & Applications
关键词
架空配电线路
雷电感应电压特性
解析计算方法
性能分析
overhead distribution line
characteristics of lightning induced voltage
analytical calculation method
performance analysis
