减小地线保护角对输电塔的影响分析

Analysis of the Influence of Reducing the Protection Angle of Ground Wire on Transmission Tower

防雷保护是保证输电线路安全性的重要环节之一,减少地线保护角是输电线路防雷的有效措施。对于既有线路,通过地线支架更换来减小保护角的改造方式最为简便,对铁塔的影响也较小。在此方法下,本文通过分析减小保护角后铁塔内力与基础作用力的变化情况,供相关改造项目借鉴。

Lightning protection is one of the important links to ensure the safety of transmission lines,and reducing grounding protection Angle is an effective measure for lightning protection of transmission lines.For existing line,it is the most convenient way to reduce the protection angle by replacing the ground wire bracket,which has little influence on the tower.Based on this method,this paper analyzes the changes of inner force and foundation force of tower after reducing the protection angle,which can be used for reference by related reconstruction projects.