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论文编号:DQ020 论文字数:8105,页数:32
摘 要
电能是现代工业生产的主要能源和动力。随着现代文明的发展与进步，社会生产和生活对电能供应的质量和管理提出了越来越高的要求。工厂供电系统的核心部分是变电所。因此，设计和建造一个安全、经济的变电所，是极为重要的。此工厂供电设计包括：负荷的计算及无功功率的补偿；变电所主变压器的台数和容量、型式的确定；变电所主接线方案的选择；进出线的选择；短路计算和开关设备的选择；二次回路方案的确定及继电器保护的选择和整定；防雷保护与接地装置的设计；车间配电线路布线方案的确定；线路导线及配电设备和保护设备的选择；以及电气照明的设计，还有电路图的绘制。
关键词：电能 变电所 变压器 继电器 接地装置
ABSTRACT
Electric energy is the main energy and dynamism of modern industry production。With development and progress of modern civilization，social production and is it put forward high request more aud more to quality and management that electric energy supply to live。The system nucleus of factory supplies power is transformer。It is very important to design and designs including：Calculation of load and compensation of the inactive power；Transformer substation main voltage transformer platform count and capacity，sureness of pattern；Mainly wire the choice of the scheme in the transformer substation；Pass in and out the choice of the thread；Choice of shorting out and calculating and switchgear；Two return circuit sureness and choice that relay protect of scheme exactly make；Defend the thunder and protect the design with the earth device；The workshop distribution line connects up the sureness of the scheme；Circuit wire and distribution equipment and protecting the choice of the sheme；Circuit wire and distribution equipment and protecting the choice of the of equipment；And the electic design that lighted，there is drawing of ciruit diagram。
Keyword：Electric energy Substation Transformer Tnterruptor The design with the earth device
目 录
摘要……………………………………………………………………………. . .…………I
1 前言………………………………………………………………………………………1
1.1 毕业设计背景及意义………………………………………...……….…………1
1.2 毕业设计内容………………………………………………...……….…………1
2原始资料…………………………………………………………………………………2
2.1 主体设计依据………………………………………………...……….…………..2
2.2 气象及地质资料供电协议………………………………………….... . ………...3
2.3 当地电业部门提供的材料………………………………………….... . …….…..3
2.4 供用电协议料………………………………………………………………….….3
3 负荷计算和无功补偿……………………………………………………….….5
3.1 负荷计算…………………………………………………………….……………..5
3.1.1 全部负荷分组及计算…………………………………………………………...6
3.1.2 总负荷计算…………………………………………………………………….10
3.2 无功功率补偿……………………………………………………………………10
4 变压器的选择…………………………………………………………………..12
5 确定供电系统图……………………………………………………………………..13
5.1 供电系统示意图………………………………………………………………..13
6短路电流的计算……………………………………………………….…...........14
6.1供电系统短路计算电路图…………………………………..……………..….….16
6.2高压册短路电流……………………………………………………..………..….16
6.2低压册短路电流…………………………………………………………….….16
6.2.1高压系统电抗……………. ……………………….....……..…………………16
6.2.2变压器的阻抗……………………………………………………………….…16
6.2.3母线的阻抗……………………………………………………………17
7 设备选择…………………………………………………………………….18
7.1 高压电缆选择…………………………………………………………………..18
7.1.1 短路热稳定性校验…………………………………………………………...18
7.1.2 按电压稳定性校验…………………………………………………………...18
7.2 高压短路器选择…………………………………………………………………..18
7.3 低压配电线路选择…………………………………………………………….....18
7.3 低压电缆选择…………………………………………………………………….19
8 整定保护计算………………………………………………………………...21
8.1 整定动作电流…………………………………………………………………….22
8.2 检查灵敏度………………………………………………………………………...22
9 变电所的防雷保护与接地装置的设计……………………………………...24
9.1直击雷防护…………………………………………………………………………24
9.2电侵入波的防护…………………………………………………….......24
9.3变电所公共接地装置的设计……………………………………………………….24
10 总结………………………………………………………………………….25
致谢……………………………………………………………………………….26
参考文献………………………………………………………………………….27
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