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
system,可编辑
--------------------------------------------------------------------- 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