击距法计算的绕击跳闸率较规程法计算值要严重；
The round-strike switching ratecalculated by strike distance method is more serious than that by regulationsmethod.
雷电绕击是危及超高压输电线路安全稳定运行的主要原因。
Lightning shielding failure is the main factor to threat the safety and reliability of EHV transmission lines.
简要论述了雷电屏蔽理论，分析了输电线路绕击率的计算方法。
This paper brief discuss the theory of lightning shielding and analyzes the calculation method of shielding failure rate of transmission line.
使用击距描述的电气几何模型广泛用于输电线路的雷电绕击分析。
The electrogeometric model (EGM) described with striking distance has been widely used in the shielding failure analysis of transmission line.
本文介绍一种用于高电压实验教学的新型仪器—雷电绕击模拟装置。
This paper presents a type of new device employed for the teaching purpose of high voltage test-imitation device for lightning strokes.
高杆塔绕击率建议采用电气几何模型分析和计算，并考虑倾斜角影响。
For the circular lightning stroke ratio of high towers and poles the electrical geometric model analysis and calculation are recommended with consideration of influence of tile Angle.
绕击是造成特高压线路跳闸的主要原因，尤其在山区应适当减小地线保护角。
Shielding failure is the main reason to cause flashover of the UHV transmission line, so that the shielding angle of grounding wires should be reduced, especially in mountain area.
分析表明，绕击时避雷器能够耐受雷电作用时的放电电流和吸收的雷电放电能量。
The calculated results show that the line ZnO surge arrester can withstand the discharge current and the absorbed lightning energy.
分析并计算了因雷电流的幅值和雷电先导入射角，以及地面倾角变化对绕击率的影响。
And it shows that the shielding failure rate is a function of the ang1e of lightning incidence, strokes lightning amplitude and ground ang1e.
国内外也有多个单位研究使用先导传播模型（LPM）计算特高压线路雷电绕击跳闸率。
Several units calculate the UHV transmission line shielding failure trip ratio with the leader propagation model (LPM).
引起特高压输电线路雷击故障的主要因素是雷电绕击，建议特高压输电线路采用负保护角运行。
The principal cause of lightning stroke failures occurred in UHV transmission lines is the shielding failure, so it is suggested to adopt the negative protecting Angle for UHVDC transmission lines.
本文提出增大避雷线的半径的方法，可以减少输电线路的绕击率，从而提高输电线路的安全、稳定性。
This passage also points out that the way of enlarging ground wire's equivalent radius can reduce the rate of shielding failure and enhance the security and stability of the transmission lines.
应用改进的电气几何模型分析了输电线路杆塔结构、避雷线和导线的布置、雷电流的幅值、地面倾角对绕击率的影响。
With such model the effect of tower structure, lightning current amplitude, angle of the lightning incidence, as well as the ground angle on the shielding failure rate are analyzed.
应用改进的电气几何模型分析了输电线路杆塔结构、避雷线和导线的布置、雷电流的幅值、地面倾角对绕击率的影响。
With such model the effect of tower structure, lightning current amplitude, angle of the lightning incidence, as well as the ground angle on the shielding failure rate are analyzed.
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