摘要
冲击电晕会造成雷电过电压的波形畸变,考虑冲击电晕影响的架空线路雷电过电压仿真有助于更为准确地开展线路绝缘配合设计。本文基于多导体传输线理论,结合电晕的等效电路模型,建立了考虑冲击电晕的多导体传输线暂态仿真模型,并通过与实测结果对比验证了模型的正确性。基于该模型,对配电线路雷电感应过电压进行了计算,并进行了感应雷和直击雷两者冲击电晕的不同机理分析。本文方法与基于Maxwell方程的电磁场方法相比,在保证计算精度的情况下可有效提高计算效率,适用于架空线路的防雷设计。
The impulse corona caused by direct and indirect lightning voltage has a great influence on the wave process of the overhead line,so the consideration of the impulse corona is helpful to the design of the insulation coordination for the overhead lines system. In this paper,a simulating model is derived based on the multi-conductor transmission line theory and the equivalent circuit of the impulse corona. The accuracy of this model is validated by the experiment in other literatures. Taking advantage of this model,the lightning induced voltage of a distributed overhead line system is studied,and the mechanism due to the direct and indirect lightning stroke is analyzed. Compared with the method based on the Maxwell equations,the proposed model is more efficient and can be used for the design of the overhead line system.
作者
胡云
师涛
王文林
王斌
覃日升
HU Yun;SHI Tao;WANG Wenlin;WANG Bin;QIN Risheng(YuXi Power Supply Bureau,Yunnan Power Grid Co.,Ltd.Yuxi 653100,China;Yunnan Electric Power Research Institute,Kunming 650051,China)
出处
《电力科学与工程》
2018年第5期36-41,共6页
Electric Power Science and Engineering
关键词
冲击电晕
雷电过电压
多导体传输线
时域有限元法
impulse corona
lightning overvoltage
muhi-conductor transmission line
time domain finite element method
