35KV变电站防雷接地技术

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题 目： 35KV变电站防雷接地技术

35KV变电站防雷接地技术

内容摘要

随着我国的经济的发展，电能作为发展的基本动力，其电力系统的规模也在不断扩大，现代各种电气设备的普遍应用，对接地的要求也越来越高，一旦有雷电波侵入，容易造成二次设备损坏，有的甚至使整个系统瘫痪，造成无可挽回的损失。而变电所正是电力系统的枢纽，因此它是防雷的重要保护部位。变电站接地系统的合理设计与应用会直接关系到人身和设备的安全。本文就以农村某35KV变电站为研究对象，以国家《防雷接地标准》为依据且结合变电站具体情况，对变电站的防雷接地进行保护设计，具有一定代表性。首先根据变电站的电气主接线图等实际情况，在了解雷电参数、雷电机理以及学习各种防雷装置的基础上，采用设计避雷针并计算验证其保护范围实现对变电站直击雷的防护；对变电站雷电侵入波的防护实现，则通过选择安装避雷器型号和设计变电站进线段的保护接线。最后在了解接地基本知识后，计算其接地电阻、最大土壤电阻率、垂直接地体根数等，实现对此35KV变电站的接地保护设计。

关键词：35KV变电站；防雷接地；设计

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35KV变电站防雷接地技术

目 录

内容摘要 ····························································································· I 1 绪论 ······································································· 错误!未定义书签。

1.1 课题研究的意义 ················································ 错误!未定义书签。 1.2 课题研究背景 ··················································· 错误!未定义书签。 1.3 本次论文的主要工作 ·········································· 错误!未定义书签。 2 变电站的防雷保护 ···················································· 错误!未定义书签。

2.1 变电站的直击雷保护 ·········································· 错误!未定义书签。 2.2 变电站的侵入波保护 ·········································· 错误!未定义书签。 2.3 变电站的进线段保护 ·········································· 错误!未定义书签。 3 变电站的防雷接地 ···················································· 错误!未定义书签。

3.1 接地概述 ························································· 错误!未定义书签。 3.2 接地电阻 ························································· 错误!未定义书签。 3.3 变电所接地装置 ················································ 错误!未定义书签。 3.4 变电站的接地原则 ············································· 错误!未定义书签。 3.5 降低接地装置工频接地电阻措施 ··························· 错误!未定义书签。 4 变电所防雷接地设计实例 ··········································· 错误!未定义书签。

4.1 变电所的规模 ··················································· 错误!未定义书签。 4.2 变电所位置的自然条件 ······································· 错误!未定义书签。 4.3 避雷针的设置及防雷保护校验 ······························ 错误!未定义书签。 4.3 35KV变电站接地设计 ········································ 错误!未定义书签。 4.4 接地装置的设置 ················································ 错误!未定义书签。 5 结论 ······································································· 错误!未定义书签。 参考文献 ····································································· 错误!未定义书签。

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35KV变电站防雷接地技术

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