This paper brief discuss the theory of lightning shielding and analyzes the calculation method of shielding failure rate of transmission line.

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。

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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.

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。

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