强台风作用下开关站构支架破坏及加固分析

Failure and Reinforcement Analysis of Switching Station Frame and Support Under Severe Typhoon Action

沿海地区的频繁强台风对电网的稳定运行带来了极大的威胁。笔者以某核电站500 kV开关站为研究背景,对其出线钢构架、设备钢支架在15级强台风上限风速45.4 m/s作用下的受力进行分析,结果表明:构架柱、地线柱、避雷针无法满足该荷载条件下的规范要求,构架梁和设备支架杆满足要求。针对不满足要求的构件,结合整改工程量和停电时间的因素,提出更换地线柱和避雷针的方案,构架柱在出线侧进行原位加固的方案。同时提出通过调整导线跨度和弧垂控制导线拉力的思路。

Frequent severe typhoons in coastal areas pose a great threat to the stable operation of the power grid..Taking a 500 kV switching station of a nuclear power plant as the research background,the authors analyze the stress of its outlet steel frame and equipment steel support under the action of 15-level severe typhoon upper limit wind speed of 45.4 m/s.The results show that the frame column,ground wire column and lightning rod cannot meet the requirements of the specification under this load condition,and the frame beam and equipment support rod meet the requirements.Aiming at the components that do not meet the requirements,combined with the factors of rectification engineering quantity and power outage time,the scheme of replacing ground wire column and lightning rod is proposed,and the scheme of in-situ reinforcement of frame column on the outlet side is proposed.At the same time,the idea of controlling the wire tension by adjusting the wire span and sag is proposed.