110kv牵引变电所防雷接地的设计_精品.doc

摘 要 雷电具有很强的危害性，因此应该重视牵引变电所雷电的防护。 本文讲述了雷电、雷电压和雷电流的形成过程,并给出了雷电参数，阐述了防雷装置如避雷针、避雷器的防雷原理以及保护范围，给出了直击雷和感应雷的防护方案，介绍了目前我国牵引变电所防雷接地设计中常用的几种措施，如：合理选择牵引变电所修建的地理位置，架设避雷针、敷设接地网，在进线段装设避雷器，同时对几种防雷措施进行了深入的论述和定量的计算分析。基于常用的防雷接地的设计方法，对平北站110kV牵引变电所进行了详细的防雷接地设计。设计中，结合当地现状，综合考虑了气候、地形、环境等多种因素，给出了较好的防雷接地保护方案。通过对牵引变电所的防雷接地设计，全面剖析了电力系统中如何提高牵引变电所的防雷水平，从而有效地降低牵引变电所的雷击事故，减少雷电对电网安全运行的影响。 最后绘制了平北接地网的平面设计图。 关键词：牵引变电所；防雷接地；雷电放电；雷电流 Abstract The lightning has very strong harmfulness, so we should pay attention to drawing the shelter of the lightning of transformer substation. This text tells the forming process that the lightning, the lightning voltage and current, provide the lightning parameter. At the same time, it expounds the lighting protecting principles and protecting scopes of lighting protecting devises, such as the lightning rod, the lighting arrester. It provides the shelter scheme of reacting lighting and attacking lighting directly, and has recommended several kinds of the daily method which is during the design of lighting protecting and grounding in the transformer substation at present, for instance: To Choose the geographical position where to built the transformer substation, erect the lightning rod, lay the earthing network, install the lighting arrester on the stock of line segment. It carries on exposition and quantitative computational analysis to several kinds of lighting protecting measures srespectively also. On the basis of lightning protecting and grounding’s design method commonly used, it designs lightning protecting and grounding on the 110kV Ping Bei transformer substation. In the design, combines the local current situation, has considered many kinds of factors such as the climate, topography, and environment synthetically, provides better programs of lightning protecting and grounding. Through the designs of lighting protecting and grounding of transformer substation, analyzing how to improve the level of lighting protecting of the transformer substation complet