摘要:在21世纪的今天，随着电力行业的稳步快速发展，变电站已经逐渐成为电力系统中不可或缺的重要组成部分。因此，变电站能否安全可靠运行就显得尤为重要。在所有影响变电站安全运行的因素中，雷电的破坏性毋庸置疑是非常巨大的，变电站是整个电力系统的心脏和枢纽，一旦变电站遭受雷击危害，很有可能会引起变压器等其他重要电气设备的绝缘损坏，这些损坏不仅仅是修复起来困难程度较大，而且可能同时造成大面积、长时间的停电，这就必然会给国民经济带来严重损失，也会给人们的日常生活造成诸多不便。本设计针对110KV变电站的防雷保护进行了设计，讲述了防雷保护的历史及发展情况，并且根据变电站的实际情况做出了具体保护措施。由变电站的建筑情况，选择避雷针的安装位置，通过适量的计算保证避雷针的保护范围无死角，使得变电站整个站区都在避雷针保护之下。此外，计算变电站的短路电流，由短路电流的计算结果，确定变电站的接地网设计方案，达到保护全站的目的。

关键词 变电站；防雷保护；保护范围；接地网

Abstract:Today in the 21st century, with the steadily rapid development of power industry, substation has become the indispensable important component. As a result, safe and reliable operation of the substation is very important. Among all the factors affecting the safe operation of the substation, lightning destructive undoubtedly is very huge, Substation is the heart and hub of the electric power system, once the substation is damaged, it is likely to cause the insulation of the transformer and other important electrical equipment damage, the damage is not only difficult to repair, and it may lead to large area and long time power outage at the same time, this will inevitably brings to the national economy serious loss, also it can cause so much inconvenience to people's daily life. This design is for the design of 110kv substation lightning protection, it tells about the history and development of the lightning protection, and it made protection measures according to the actual situation of substation. According to the substation construction situation, i choose the installation location of lightning rod, make sure that there is no dead angle of lightning rod through the moderate calculation, so that the substation lightning protection can cover the station. In addition, calculate the substation of the short circuit current, through the short-circuit current calculation results, make the substation ground network design plan, achieve the purpose of protection of total station.

Keywords  Substation  Lightning protection  Scope of protection  Grounding grid