高电压技术2011，Vol.37Issue(1)：28-33,6.
雷击输电线路杆塔时的杆塔等效模型
Equivalent Model of Transmission Tower Under Lightning Striking
摘要
Abstract
In order to analyze the wave process of the transmission tower struck by lightning, the equivalent model of a transmission tower was studied. Based on the correlative theory of taper antenna, the equivalent wave impedance model of a single tower stanchion was also studied. Firstly, the tower was regarded as a four-conductor system in consideration of the fact configuration of a tower, the equivalent wave impedance of the four-conductor system was derived from a single vertical conductor. Secondly, considering the definition of wave impedance, the compensation factor of the four-conductor system was introduced, including compensation factor of inductance and compensation factor of capacitance. Finally, the compensation factor of inductance was calculated by the Riemann formula, and the compensation factor of capacitance was obtained from the surrounding condition of electric field distribution of the four-conductor system and the single vertical conductor. Moreover, the equivalent impedance of four-conductor system was elicited by multiplying the compensation factor with the equivalent impedance of a single vertical conductor, so the equivalent impedance of the tower was found. A 500 kV tower was calculated using the equivalent impedance model of the tower.关键词
雷击/波阻抗/圆锥天线/电感修正系数/电容修正系数/杆塔模型Key words
lightning strike/wave impedance/taper antenna/compensation factor of inductance/compensation factor of capacitance/tower model分类
信息技术与安全科学引用本文复制引用
杜林,糜翔,杨勇,杨庆..雷击输电线路杆塔时的杆塔等效模型[J].高电压技术,2011,37(1):28-33,6.基金项目
国家重点基础研究发展计划(973 计划)(2009CB724504). （973 计划）
