架空线缆雷电感应过电压仿真研究

摘要

本文从理论上分析了感应雷击在架空线缆上形成的过电压特性，采用传输线理论模型和Agrawal方程，推导出感应雷过电压波形的解析公式；分析了感应雷电压波形基本特征及电缆长度、波阻抗、大地电导率等参数对感应雷电压波形的影响。仿真结果验证了理论分析和解析公式的正确性，表明该方法不仅物理意义明确，而且便于编程实现，计算效率高。%This paper theoretically analyzes the induction lightning overvoltage characteristics on the overhead lines. Based on transmission line theory model and Agrawal equation, the analytic formula of induction lightning overvoltage waveform is deduced. The basic characteristic of induction lightning voltage waveform are analyzed, as well as the impact on the induction lightning voltage waveform such as cable length, wave impedance, earth conductivity parameters. The simulation results verify the correctness of theoretical analysis and show that the method is easy for programming and high computational efficiency.