| 高电阻率地面架空线路雷击过电压的研究 |
投稿时间：2018-12-29 修订日期：2018-12-29  点此下载全文 |
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| 中文摘要:针对高电阻率地面架空线路雷击事故频发的现状,本文对高电阻率地面架空线路雷击性能进行系统地分析。建立架空线路雷击电压仿真计算模型,对不同土壤电阻率下的感应雷过电压进行了计算分析,并获得了高土壤电阻率地面架空线路感应雷过电压值与雷击点距离之间的关系。为分析高土壤电阻率地面架空线路雷击跳闸情况,根据基于概率学原理的输电线路雷击跳闸率计算方法,获得了不同电阻率下地面架空线路的雷击跳闸规律及高电阻率地面架空线路所装设绝缘子的绝缘强度与雷击跳闸率之间的关系。本文研究成果可为高电阻率地面架空线路的防雷设计及降低雷击跳闸率提供有效的参考和指导。 |
| 中文关键词:土壤电阻率 雷击过电压 架空线路 雷击跳闸率 |
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| Research on Overhead Line Lightning Overvoltage of High Resistivity Ground |
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| Abstract:In view of situation that the lightning accident of the high resistivity ground overhead line happened frequently, lightning strike performance of high resistivity ground overhead line is systematically analyzed in this paper. The lightning strike voltage simulation calculation model of overhead line was established, and the induced lightning overvoltage under different soil resistivity were calculated and analyzed, the relationship between the overvoltage of induced lightning and the distance of lightning strike point is obtained. In order to analyze the lightning tripping of high soil resistivity ground overhead line, according to the probabilistic principle of transmission line lightning tripping rate calculation method, the lightning tripping rule of ground overhead lines with different resistivity and the relationship between the insulation strength of insulators installed in ground overhead lines with high resistivity and the lightning tripping rate are obtained. The research results of this paper can provide effective reference and guidance for lightning protection design of high resistivity ground overhead circuit and reduction of lightning tripping probability. |
| keywords:soil resistivity lightning overvoltage overhead line lightning tripping rate |
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