接地网的雷电冲击特性

为准确计算接地网的冲击特性,在场路结合的接地网暂态计算模型基础上,利用快速傅立叶变换提出了土壤电离计算模型。考虑了导体周围土壤火花放电对雷电暂态效应以及导体间阻性耦合和感性耦合的影响,利用快速傅立叶变换及其反变换,分析了不同地网结构,不同雷电流注入点等因素的接地网冲击特性。

Lightning Impulse Characteristics of Grounding Grid

In order to accurately calculate the lightning impulse characteristic of grounding grid,the paper uti- lizes the fast Fourier transform proposes a soil ionization model by coupling the circuit analysis with an electro- magnetic analysis.The model considers the impact of around the grounding conductor of the soil spark dis- charge to the thunder and lightning transient effect and the impact of conductor of the coupling between the re- sistance and the emotional.The model also analyses the grounding grid characteristic in some factors such as the different network structure,the different thunderstorm and lightning class.