本科毕业论文---220kv变电站电气一次部分初步设计

毕业设计（论文）

课题名称 220kV变电站电气一次部分初步设计

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系 、 专 业 电气工程系、电气工程及其自动化

指导教师

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内容提要

本次设计为220kV变电站电气一次部分的初步设计。根据原始资料，以设计任务书和国家及行业有关电力工程设计的规程规范为设计依据，并结合该地区实际情况设计该变电站，设计的内容符合国家有关经济技术政策，所选设备全部为国家推荐的新型产品，技术先进、运行可靠、经济合理。本期该变电站设有两台主变压器，远期该变电站设有三台主变压器。站内主接线分为220kV、110kV和10kV三个电压等级。

设计正文分设计说明书和设计计算书两个部分，设计说明书包括电气主接线设计、变压器选择说明、短路电流计算说明、电气设备选择说明、配电装置设计、电气总平面布置和防雷保护设计；设计计算书包括变压器选择、短路电流计算、电气设备选择及校验等，并附有电气主接线图及其它相关图纸。

关键词： 220kV变电站； 短路计算； 主接线； 设备选择。

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Summary

The design of 220 kV substation electrical part of the preliminary design at a time. According to the original data, a design specification and country and industry relevant power engineering design procedure specification for design basis, and combined with the region's actual condition, the design of the substation design in conformity with the relevant economic and technological policies of the state, the contents of the selected equipment for all countries recommend new products, advanced technology, reliable operation, economic and reasonable.. The substation is equipped with two sets of the main transformer, forward the has three main transformer substation. station connection is divided into 220 kV, 110 kV and 10 kV voltage grade three.

This text points design specifications and design calculation of two parts, the design specifications, including the main electrical wiring design of transformer selection, the short circuit current calculation, electrical equipment selection, design of power distribution equipment, electrical total plane layout and lightning protection design; Design calculation includes the choice of transformer, the short-circuit current calculation, electrical equipment selection and calibration, etc., with the main electrical wiring diagram and related drawings.

Key words: 220 kV substation; Short circuit calculation; The main wiring; Equipment

selection.

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目 录

内容摘要 ............................................................................................................ I Summary ........................................................................................................................... II 第一部分 设计说明书

1 原始资料 ....................................................................................................... 1 1.1 建站的必要性 ............................................................................................ 1 1.2 系统接入方式 ............................................................................................ 1 1.3 变电工程规模 ............................................................................................ 2 1.4变电站站址选择 ......................................................................................... 2 1.5系统短路阻抗及本期出线潮流估计 ......................................................... 2 2 变压器选择 ................................................................................................... 5 2.1 主变压器选择 ............................................................................................ 5 3 电气主接线设计 ........................................................................................... 9 3.1 主接线设计的原则和要求 ........................................................................ 9 3.2 主接线基本接线方式 ................................................................................ 9 3.3 主接线设计步骤 ...................................................................................... 10 3.4 本站主接线设计方案 .............................................................................. 11 4 短路电流计算说明 ..................................................................................... 18 4.1 短路电流计算概述 .................................................................................. 18 4.2 常见短路电流计算 .................................................................................. 19 4.3 短路电流计算结果 .................................................................................. 21 5 高压电器设备选择 ..................................................................................... 23 5.1 电气设备选择一般条件 .......................................................................... 23 5.2 高压断路器的选择 .................................................................................. 24 5.3 隔离开关的选择 ...................................................................................... 26 5.4 互感器的选择 .......................................................................................... 27 5.5 母线的选择 .............................................................................................. 28 6 配电装置设计 ............................................................................................. 29