10kv中心变电站电气部分设计

摘 要

变电站是电力系统的重要组成部分，它直接影响整个电力系统的安全与经济运行，是联系发电厂和用户的中间环节，起着变换和分配电能的作用。

这次设计以10kv降压变电站位置要设计对象，分析变电站的原始资料确定变电站的主接线；通过负荷计算确定变压器台数、容量及型号。根据短路电流的计算结果，对变电站的一次设备进行了选择和校验。同时完成配电装置的布局、防雷保护及接地装置方案的设计。

关键词：变电站电器主接线；短路电流计算；一次设备；防雷保护

Abstract

Substation is an important part of power system, which directly affects the safety and economic operation of the whole power system, is the intermediate link between power plants and users, plays a role in transformation and distribution of electricity.

This is designed to 10kV step-down substation location to determine the main substation design object, the original data analysis substation; load calculated by number, transformer capacity and models. According to short-circuit current calculation results, a device for substation were selected and verified. Design and complete electric equipment layout, lightning protection and grounding device of the scheme.

Keywords: substation main electrical wiring; short-circuit current calculation; a lightning protection equipment;

目 录

Abstract ····························· - 2 - 目 录 ······························ - 3 - 1.绪论 ······························ - 5 -

1.1设计的背景 ························ - 5 - 1.2国内外研究综述 ······················ - 5 - 2 电气主接线设计 ························· - 7 -

2.1电气主接线的基本形式 ··················· - 7 -

2.1.1单母线接线 ····················· - 7 - 2.1.2单母线分段接线 ··················· - 8 - 2.1.3单母线分段带旁路母线 ················ - 8 - 2.1.4双母线接线 ····················· - 9 - 2.1.5双母线分段接线 ·················· - 10 - 2.1.6桥型接线 ····················· - 10 - 2.2电气主接线的选择 ···················· - 11 -

2.2.1 10kv电气主接线 ················· - 11 - 2.2.2 110kv电气主接线 ················· - 12 -

3 主变压器的选择 ························ - 14 -

3.1负荷计算 ························ - 14 - 3.2主变压器型式的选择 ··················· - 14 -

3.2.1主变压器台数的选择 ················ - 14 - 3.2.2主变压器容量的选择 ················ - 15 -

4 短路电流计算 ························· - 16 -

4.1短路计算的目的 ····················· - 16 - 4.2 短路计算过程 ······················ - 16 - 5 备用电源自动投入装置 ····················· - 18 -

5.1备用电源自动投入装置作用 ················ - 18 - 5.2 适用情况以及优点 ···················· - 18 - 5.3 BZT的工作过程及要求 ·················· - 19 -

6 电气设备的选择 ························ - 21 -

6.1 选择设备的一般原则和基本要求 ·············· - 21 - 6.2假想时 …… 此处隐藏：5670字，全部文档内容请下载后查看。喜欢就下载吧 ……