【摘要】 根据超、特高压杆塔的结构特点,对传统的电气几何模型(EGM)进行改进,并引入击距修正系数的概念,使得模型更加符合超、特高压杆塔的情况。从几何关系的角度提出了求解电气几何模型最大击距的改进计算方法,并应用该方法计算超、特高压交流输电线路的绕击跳闸率。计算结果表明:所提出的超、特高压交流输电线路绕击跳闸率的改进计算方法比传统计算方法更加准确、可靠。更多还原

【Abstract】 In this paper, based on the structural characteristics of extra and ultra high voltage towers, the traditional electrical geometric model(EGM) is upgraded with the concept of striking distance correction factor being presented, which can make the model accord with the extra and ultra high voltage towers better. The improved electrical distance calculation method for solving the maximum striking distance of EGM is proposed from the perspective of geometry and is applied to the calculation of shielding failure trip-out rate for extra and ultra high voltage lines. The calculation results indicate that the improved calculation method is more accurate and reliable than the traditional one.更多还原