供配电毕业论文

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摘 要

本次毕业设计为苏丹GNPOC石油公司总部大楼变配电所电气设计。在整个设计中,依据相关的设计规范和标准以及有关专业提供的设计资料,对这个工程的变配电所系统进行设计。设计的主要内容包括高压配电系统、低压配电系统、配电房系统,继电保护系统。即根据有关的设计标准确定变压器的数量、容量、型号和布置;确定主接线方式,确定高、低压柜的数量、型号和布置;确定控制和保护电器的型号、规格,并进行验算;确定电缆、母线及其他干线的型号、规格,并进行验算;确定照明、动力等设备的配电设备;确定继电保护装置的元件并设计二次接线方案等。

关键词:高压配电系统 低压配电系统 继电保护系统

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--------------------------------------------------------------------- Abstract

This graduation project is designed for the high-voltage , low-voltage system

protective relay system of transformer substation for the building of Sudan GNPOC

oil headquarters, In the whole design, the design materials that I offered

according to country's relevant design specification and standard and relevant

specialities, design the transformer substation. The main content designed

includes high-pressure distribution system , low-voltage distribution system ,

distribution room system, protective relay system, namely confirm the quantity ,

capacity , type of the voltage transformer and assign according to relevant design

standards; Confirm the main wiring way, confirm the quantity , type of the high ,

low-voltage cupboard and assign; Confirm that controls and protects the type ,

specification of the electric apparatus, carry on checking computations; Confirm

the type , specification of cable , bus bar and other main lines, carry on checking

computations; Confirm distribution equipment of such equipment as lighting , power ,

Confirm the components of relay protection devices and design secondary wiring

program,etc.

Keywords: high-pressure distribution system low-voltage distribution system protective relay

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--------------------------------------------------------------------- 目 录

摘 要 ...................................................................... I

ABSTRACT ................................................................... II

第一章 绪 论 ................................................................ 1

1.1 原始资料背景 ........................................................ 1

1.1.1 负荷状况 ...................................................... 1

1.1.2 气象、土壤等资料 .............................................. 1

1.2 设计内容和基本思路 .................................................. 1

1.2.1 变配电所高低压系统图设计 ...................................... 2

1.2.2 变配电所照明设计 .............................................. 2

1.2.3 二次系统图设计 ................................................ 2

1.2.4 防雷接地设计 .................................................. 2

第二章 负荷计算 ............................................................. 3

2.1 负荷计算 ............................................................ 3

2.1.1 计算负荷的确定 ................................................ 3

2.1.2 负荷计算的方法 ................................................ 3

2.1.3 负荷计算结果 .................................................. 3

2.1.4 变压器的容量及台数的选择 ...................................... 7

2.1.5变压器的损耗 .................................................. 8

2.1.6.无功功率的补偿 .............................................. 10

第三章 电气主接线的设计 .................................................... 12

3.1高压侧一次接线 ..................................................... 12

3.1.1一次接线的设计原则 ........................................... 12

3.1.2 实际方案设计 ................................................. 12

3.2 低压侧一次接线 ..................................................... 13

3.2.1 低压侧一次接线的设计原则 ..................................... 13

3.2.2 实际设计方案 ................................................. 13

第四章 短路电流的计算 ...................................................... 15

4.1短路电流计算的目的及方法 ........................................... 15

4.2短路电流计算 ....................................................... 15 可编辑

--------------------------------------------------------------------- 4.2.1标幺值法 ..................................................... 15

第五章 高低压设备选型及短路效应校验 ........................................ 20

5.1高低压设备选型 ..................................................... 20

5.2设备选型应验算的项目及计算公式 ..................................... 20

5.3电气设备的短路效应校验 ............................................. 21

5.3.1断路器的断流容量、热稳定及动稳定校验 ......................... 22

5.3.2负荷开关及熔断器的短路效应校验 ............................... 30

5.3.3隔离开关、电流互感器、支持绝缘子的短路效应校验 ............... 30

5.3.4母排的动稳定及热稳定校验 ..................................... 30

5.3.5线路的热稳定校验 ............................................. 30

第六章 变配电所 ............................................................ 32

6.1变配电所的布置 ..................................................... 32

6.1.1基本设计要求 ................................................. 32

6.1.2高压配电室的布置 ............................................. 33

6.1.3低压配电室的布置 ............................................. 34

6.1.4变压器室的布置 ............................................... 35

6.2变配电所的照明 ..................................................... 37