某冶金机修厂供电系统设计

范文编号:DQ153   范文字数:13177,页数:38

摘要
 本文档设计为XXXXXXXX学院2005级电气工程及其自动化专业（本科）文档设计，设计题目为：某冶金机修厂供电系统设计。此设计任务旨在体现对本专业各科知识的掌握程度，培养对本专业各科知识进行综合运用的能力，同时检验本专业学习四年以来的学习结果。
 本设计首先通过负荷计算及供电范围确定了主变压器台数，容量及型号，同时也确定了车间变压器的容量及型号，最后，根据最大持续工作电流及短路计算的计算结果，对高压断路器，隔离开关，母线，电压互感器，电流互感器进行了选型，采用并联电容器进行低压集中补偿，对变压器进行过电流，电流速断，瓦斯保护，按第三类防雷建筑物设防，采用强弱电联合接地系统对建筑物进行保护。并根据设计的结线方式得出供电系统主接线图，从而完成了供电系统的设计。
关键词：供电系统设计；变压器；断路器

Abstract
The graduation project for the 2005 Zhejiang University of Science and Technology of electrical engineerings and automation (undergraduate) design, the subject of the: design is: The design of power supply system for metallurgical machinery plants. This task of the design is to reflect on the professional degree of subject knowledge,to train on the comprehensive use of subject knowledge ,to test the professional learning since a four-year learning outcomes. at the same time.
The design at first calculated through the load and supply area to determine the number, capacity and model of the main transformer, as well as determine the capacity and the model of the workshop transformer, and finally, in accordance with maximum sustained short-circuit current calculation and the calculation of the results of high-voltage circuit breakers, isolation switch, busbar, voltage transformer, current transformer for the selection, use of shunt capacitor compensation to focus on low-voltage, over-current of the transformer, the current off-speed, gas protection, lightning protection of buildings by the third type of security using strong or weak electrical grounding system of the joint protection of buildings. And draw the wiring diagram of the power supply system according to the design of wiring methods in order to complete the design of power supply system.
 
Keywords：design of power supply system ; transformer; circuit breaker

目录

摘要 II
Abstract III
1.前 言 1
2.设计原始材料 2
3.负荷计算及无功补偿 6
3.1全厂负荷统计 6
3.2无功功率补偿的计算 8
4.选择总变电所变压器台数及其容量 10
4.1总变电所变压器台数的选择 10
4.2总变电所变压器容量的选择 10
4.3总变电所主线的设计 10
4.4拟定总变电所供电系统图 11
5.短路电流计算 12
5.1短路电流计算的目的及方法 12
5.2短路电流的计算 12
6. 车间变电所的设计及高低压设备选择 15
6.1  车间变电所所址的选择 15
6.1.1车间变电所所址选择的要求 15
6.1.2车间变电所的总体布置及要求 15
6.2车间变电所的接线 16
6.3车间变电所变压器的选择 18
6.4高、低压设备选择 19
6.4.1高压电气设备的选择及校验条件 19
6.4.2低压电气设备的选择及校验条件 22
7.变电所高压进出线的选择 24
7.1  35KV高压进线的选择 24
7.2  主变压器至6KV母线电缆的选择 25
7.3  6KV母线到车间变压器的电缆选择 25
7.4高压母线的选择 26
8.继电保护设置 27
8.1主变压器的继电保护 27
8.1.1装设瓦斯保护 28
8.1.2装设反时限过流保护 28
8.1.3装设电流速断保护 28
9.防雷与接地设计 29
9.1  变电所防雷 29
9.2雷电侵入波的防护 30
9.3电容器的保护 30
9.4接地装置的设计 30
9.4.1车间低压系统的接地保护 30
9.4.2公共接地装置的设计 30
总 结 32
致 谢 33
参考文献 34
附录  系统主接线图 35

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