冶金厂总降压站设计

冶金厂总降压站设计

文档编号:DQ064 文档字数:7388,页数:28

摘要

本设计要涉及到的是变压器进线出线的选择，母线和电缆的选择，无功功率的补偿，继电器，熔断器的选型。变压器的进出线主要考虑的是进线高压电缆的选取，各厂区电缆的选择是按各厂区负荷不同而选择不同型号的电缆。
由于采用多个变压器进行供电，母线采用分段式，根据负荷平均的原则，在各条母线上分别连上各厂区的电缆。电气主接线是变电所的主要环节，电气主接线的拟定直接关系到全所电气设备的选择、配电装置的布置、继电保护和安全自动装置的确定，是变电所电气部分投资大小的决定性因素。
无功功率的补偿采用集中补偿的方法来完成。对于每个负载线路，我们都进行了继电保护，还配以熔断器保护。此项设计比较完整的对整厂的供电系统进行了设计，对实际电路的敷设有一定的参考价值。

关键词供电设计；变压器；断路器

Abstract

This course is designed primarily the electrical wiring in a 10KV transformer station Factory , which involved the transformer to the cable, the choice of bus bar and cable options, the compensation of wattless power , relays, the fuze protection. The main problem of the Transformers into the project is the selection of high-tension cable lines, we choice the different models of electricity which was based on loading of the district.
With the introduction of several transformers for power supply, the introduction of sub-bus bar, according to the principles of the average load in two separate generating lines, distributing the loads in two separate generating line. Electricity lord connects line is the vital link of transformer substation in power plant, the draft of the electricity lord connects line relates directly to the choice of the whole substation's electric equipments, the arrangement of the distribution electricity device, the determination of the relay protection of power system and the automatic device, It is a decisive factor of the invests size to the transformer substation electricity part.
We use to the method of complete concentration to compensate the wattless power .For each line; we have a relay, coupled with fuze protection. The design of the power supply system is a rather integral design; there are certain reference values to next design.
Keywords the design of power；transformer；breaker

目录
摘要………………………………………………………………………………………………Ⅰ
1. 前言…………………………………………………………………………………………………1
1.1 设计主要任务………………………………………………………………………………..１
1.2 设计基本要求………………………………………………………………………………1
1.3 设计的意义……………………………………………………………………………………1
2. 设计原始材料………………………………………………………………………………………2
3. 负荷计算及无功补偿……………………………………………………………………………6
    3.1 车间和工厂的负荷统计…………………………………………………………………...6
    3.2 无功功率补偿的计算……………………………………………………………………...8
4. 选择总变电所变压器的台数及容量………………………………………………………10
    4.1 变电所变压器台数的选择………………………………………………………….10
    4.2 变电所变压器容量的选择………………………………………………………….10
    4.3 变配电所主线的设计……………………………………………………………….11
5. 短路电流计算……………………………………………………………………………………13
    5.1 负荷中心的确定…………………………………………………………………..13
    5.2 短路电流的计算…………………………………………………………………14
6. 变电所一次设备的选择及校验…………………………………………………………17
    6.1 设备选择原则………………………………………………………………………17
    6.2 设备的选择………………………………………………………………………...17
    6.3 设备的校验…………………………………………………………………………18
7. 总变电所高压进出线的选择………………………………………………………………21
    7.1 35KV高压进线的选择…………………………………………………………..21
    7.2 SL7-6300/35变压器出线端至6.3KV主线电缆的选择校验…………………….21
    7.3 6.3KV母线到各车间变压器的电缆选择……………………………………….21
8. 继电保护设置……………………………………………………………………………………23
    8.1 主变压器的继电保护装置……………………………………………………….23
9. 防雷与接地设计…………………………………………………………………………………24
    9.1 防雷设计………………………………………………………………….24
    9.2 变电所公共接地装置的设计……………………………………………24
10. 总结………………………………………………………………………………………………25
11. 致谢………………………………………………………………………………………………26
参考文献…………………………………………………………………………………………27
附录……………………………………………………………………………………………………28

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