摘要
针对在强台风影响下,沿海配电线路发生倒杆、断杆等问题,对安装防风拉线加固方法进行了理论研究,探讨了拉线安装方法对加固效果的影响。建立了10 k V双回路杆塔的力学模型,对导线和电杆进行了受力分析,考虑了风力、重力和拉线拉力的作用,推导出了加固前后电杆的轴力、弯矩、挠度,以及拉线拉力的解析表达式。通过一工程实例,计算了在45 m/s风速下安装拉线前后杆塔的内力和挠度值,并分析了风速和拉线安装位置对杆塔加固效果的影响。研究结果表明:安装防风拉线能大大提高配电线路的抗风能力;将拉线抱箍安装在最下层横担以下0.5 m^0.8 m处,可以取得最佳加固效果。相关研究结果,可为配电线路设计和加固提供理论参考。
Aiming at the breaking or falling of the poles of distribution lines under violent typhoon, a theoretical research on the strengthening method by installing stay wire was presented. Firstly, a pole mechanics model of 10 k V two-circuit line pole was established. Via the mechanics analysis, considering the wind force, gravity and the stay wire tension, the internal forces and deflection of the pole, and the tensile of the stay wire were derived in analytical form. Then an engineering project was proposed to study the change of the internal forces and deflection of poles before and after being reinforced by stay wire under wind speed 45 m/s. Finally, the effect of wind speed and reinforcing location on the pole were discussed. The results indicate that installing stay wire can greatly enhance the wind capacity of the lines. The best enhancing location is at 0.5 m^0.8 m below the bottom pole arm. The research results can provide theoretical references on the design and strengthening of distribution lines.
作者
张胜强
王俊武
雷炳晖
周晓明
卫才猛
柯维新
刘燕秋
ZHANG Sheng-qiang WANG Jun-wu LEI Bing-hui ZHOU Xiao-ming WEI Cai-meng KE Wei-xin LIU Yan-qiu(Huizhou Power Supply Bureau, Guangdong Power Grid Corporation, Huizhou 516001, China Guangzhou Power Electric Technology Co., Ltd., Guangzhou 510640, China Guangdong Power Grid Co., Ltd., Guangzhou 510000, China Huizhou Electric Power Design Institute, Huizhou 516001, China)
出处
《机电工程》
CAS
2017年第10期1192-1195,1204,共5页
Journal of Mechanical & Electrical Engineering
关键词
台风
双回路
拉线加固
受力分析
杆塔
typhoon
two-circuit line
stay wire reinforcing
mechanics analyze
pole
