摘要
在超高压输电线路地形高差较大且连续倾斜的档,地线在运行中受温度、微气象、风害、覆冰等外界环境影响常发生滑移的情况.以750 kV官东Ⅰ线为例,分析了地线滑移的主要原因是高差较大的连续倾斜档受力不平衡.提出了简单经济、切实可行的技改方案:地形起伏较大的塔位普通悬垂串改造为悬垂开断形式,改善了地线、线夹以及金具的受力,充分发挥了金具的灵活性和自身调节裕度,有效缓冲了外界环境影响产生的不平衡张力.
In the extra high voltage line span which is inclined and in complex landform condition,the ground wires often slip affected by temperature,microclimate,wind,ice and other outside environment.According to 750 kV Guan-Dong I Transmission Line for example,this paper analyzes the main reason of the ground line slip in the situation described above with the conclusion of unbalance force,and suggests a simple,economical and practical method,which changes the common pendency string to the type of pendency-breaking on the tower with biggish hypsography,improves ground line,line clips,and gold tool's force bear,highly exertes the gold tool's agility and self-regulate tolerance degree,effectively buffers the imbalance tension influenced by the outside environment.
关键词
750KV线路
地线滑移
普通悬垂串
悬垂开断
750 kV transmission line
ground wires slip
common pendency string
pendency-breaking
