基于多脉冲回击电流且考虑电晕效应的输电线路雷击耦合过电压研究  

Research on Lightning Coupling Overvoltage of Transmission Line Based on Multi Pulse Return Current and Considering Corona Effect

作　　者：何思阳 HE Siyang(Duyun Power Supply Bureau,Guizhou Power Grid Co.,Ltd.,Guiyang 558000,China)

机构地区：[1]贵州电网有限责任公司都匀供电局,贵州都匀558000

出　　处：《电工技术》2021年第23期33-34,36,共3页Electric Engineering

摘　　要：针对目前国内外对架空线路耦合雷电过电压的研究忽略多脉冲、电晕电流这两个重要影响因子情况,首先建立双脉冲及考虑电晕电流的电流源模型,其次利用FDTD算法对空间电磁场求解,并结合Agrawal耦合模型对距离线路不同雷击点条件下的线路耦合过电压变化趋势进行研究。结果表明,在两个脉冲及电晕电流作用下,相同雷击点计算出耦合过电压峰值均大于单脉冲25%,且电晕效应能抑制10%的雷电过电压。In view of the current domestic and foreign research on coupled lightning overvoltage on overhead lines,a current source model of double pulse and considering corona current is established ignoring the two important influencing factors of multi-pulse and corona current.Then,the FDTD algorithm is used to solve the electromagnetic field in space.Combined with the Agrawal coupling model,under the condition of different lightning strike points from the line,the variation trend of the line coupling overvoltage is studied.The results show that under the action of two pulses and corona currents,the peak value of the coupling overvoltage calculated at the same lightning strike point is greater than 25%of the single pulse,and the corona effect can suppress 10%of the lightning overvoltage.

关 键 词：过电压 电晕 FDTD Agrawal 多脉冲 

分 类 号：TM86[电气工程—高电压与绝缘技术]