输电线路雷击跳闸率的简易计算法

雷击是输电线路安全供电的主要危害。随着电压等级的提高及线路结构的变化,输电线路雷击跳闸率计算法也不断地改进。本文比较了规程法、经典电气几何模型法及改进电气几何模型法,分析了保护角、电压等级以及雷电流对绕击率的影响,提出一种改进简易计算法,并进行了实例计算比较。

A Simple Calculation Method of Lighting Trip-Out Rates for Transmission Line

Lighting is the main damage for transmission line of offering electric power safely. With being higher the voltage and varying of transmission line structure, the calculation method of lighting trip-out rates should be improved continually. In this paper some methods about lighting trip-out rates are compared, such as standard method, electric-geometry model and improved electric-geometry model. To lighting trip-out rates the affection of protection angle and voltage levels and lightning current are analyzed. In the end, a simple calculation method of lighting trip-out rates for transmission line is proposed, and by two fact examples, the conclusions using proposed calculation method are compared with that of other methods.