星星小区设计计算书

毕 业 论 文

……………………. ………………. ………………… 题目： 装 订

线 ……………….……. …………. …………. ………

星星小区电气设计 院 部 机械与电子工程学院 专业班级 电气工程及其自动化 届 次 学生姓名 学 号 指导教师 二О一二年六月十日

目录

摘要 ..................................................................................................................................... I Abstract ............................................................................................................................ II 引言 .................................................................................................................................... 1 1设计概况......................................................................................................................... 1

1.1小区概况 ............................................................................................................. 1 1.2设计依据 ............................................................................................................. 1 1.3 设计要求............................................................................................................. 2 1.4 设计成果............................................................................................................. 2 2 设计计算书.................................................................................................................... 2

2.1 负荷分析............................................................................................................. 2 2.2 负荷统计计算..................................................................................................... 3 2.3 无功功率计算及补偿......................................................................................... 5

2.3.1 无功补偿方式 ......................................................................................... 5 2.3.2 无功补偿容量 ......................................................................................... 5 2.4 变压器的选择..................................................................................................... 6 2.5 变电所位置和形式的选择................................................................................. 6 2.6 变电所主接线方案的选择................................................................................. 8

i

2.6.1 变电所主接线方案的评价 ..................................................................... 9 2.6.2 变电所主接线方案的确定 ..................................................................... 9 2.7 短路电流计算................................................................................................... 10

2.7.1 短路电流计算的目的和内容 ............................................................... 10 2.7.2 短路电流的计算 ................................................................................... 10 2.8 变电所一次设备的选择................................................................................... 12

2.8.1 高压进线电缆的选择 ........................................................................... 12 2.8.2 高压母线的选择 ................................................................................... 12 2.8.3高压一次设备的选择和校验 ................................................................ 13 2.8.4 低压一次设备的选择和校验 ............................................................... 14 2.8.5 低压电缆的选择 ................................................................................... 16 2.8.6 低压母线的选择 ................................................................................... 18 2.9 变电所二次设备选择....................................................................................... 18

2.9.1 高压侧二次设备选择 ........................................................................... 18 2.9.2 低压电流互感器的选择 ....................................................................... 18 2.10 变电所继电保护设计 .................................................................................... 19

2.10.1 概述..................................................................................................... 19 2.10.2 变压器保护设置................................................................................. 19 2.10.3 变电所10KV馈线保护..................................................................... 20 2.10.4 变电所10KV母线保护..................................................................... 23

ii

2.11 电气照明设计 ................................................................................................ 23

2.11.1 光源照度计算..................................................................................... 23 2.11.2 电源进线设计..................................................................................... 25 2.12 弱电系统设计 ................................................................................................ 26

2.12.1 概述..................................................................................................... 26 2.12.2 有线电视系统..................................................................................... 26 2.12.3 电话系统............................................................................................. 27 2.12.4 网络布线系统..................................................................................... 27 2.12.5 访客对讲系统..................................................................................... 27 2.13 防雷和接地装置的确定 ................................................................................ 27

2.13.1 概述..................................................................................................... 27 2.13.2 变电所防雷接地系统设计................................................................. 27 2.13.3 单体楼防雷接地系统设计................................................................. 29

参考文献 .......................................................................................................................... 30 致谢 .................................................................................................................................. 31 附录 .................................................................................................................................. 32

iii

Contents

Abstract ............................................................................................................................ II Introduction .................................................................................................................... 1 1 Design Overview ........................................................................................................ 1

1.1 Plot overview ................................................................................................... 1 1.2 Design basis ..................................................................................................... 1 1.3 Design requirements ..................................................................................... 2 1.4 Design results .................................................................................................. 2 2 Design calculation ..................................................................................................... 2

2.1 Load analysis.................................................................................................... 2 2.2 Load calculation .............................................................................................. 3 2.3 Reactive power calculation and compensation ..................................... 5

2.3.1 Reactive power compensation ........................................................ 5 2.3.2 Reactive power compensation capacity ....................................... 5 2.4 The choice of transformer............................................................................ 6 2.5 Substation location and form selection ................................................... 6 2.6 Substation main wiring scheme selection ............................................... 8

2.6.1 Substation main wiring scheme evaluation ................................. 9 2.6.2 Substation main wiring scheme ...................................................... 9

iv