洛阳理工学院毕业设计(论文)
化纤毛纺厂总变电所及配电系统设计
摘 要
众所周知,工厂供电就是将电力系统的电能降压再分配电能到各个厂房或车间中去,它由工厂降压变电所,高压配电线路,车间变电所,低压配电线路及用电设备组成。工厂总降压变电所及配电系统设计,是根据各个车间的负荷数量和性质,生产工艺对负荷的要求,以及负荷布局,结合国家供电情况来设计的。
因此,为实现工厂供配电的高效和合理,必须根据各车间的负荷数量和性质,并考虑到电气设备的运行维护以及生产工艺对负荷的要求,进行负荷的统计和短路电流的计算,并最终依此选择高低压设备、输电线路的型号,完成简单避雷措施设计,解决对各部门的安全可靠,经济分配电能的问题!
关键词:降压,电能,负荷,短路电流,电气设备
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洛阳理工学院毕业设计(论文)
ABSTRACT
As we all know ,Factory power supply system of the power system is the
redistribution of power step-down power to the various factories or workshops, and its step-down transformer from the factory, high-voltage power distribution lines,substation plant, low-voltage distribution lines and electrical equipment composition. The total step-down substation plant and distribution system design is based on the various workshops the number and nature of the load, the production process on the load requirements as well as load distribution, combined with the national power supply situation.
Therefore, in order to achieve the factory for the efficient and rational distribution, the load must be based on the number and nature of the workshop, and taking into account the operation and maintenance of electrical equipment and production process on the load requirements, the load calculation of statistics and short-circuit current, and So select the high and low end equipment, transmission line model, complete the simple design of lightning protection measures to address the safety and reliability of various departments, the problem of economic distribution of power.
KEY WORDS: step-down, power, load, short-circuit, electrical equipment
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洛阳理工学院毕业设计(论文)
目 录
前言 ................................................................1 第1章 负荷的计算 ................................................2
1.1电力系统的负荷 ..........................................2
1.1.1负荷的概念 .........................................2 1.1.2电力负荷的等级 ....................................2 1.2电力系统的计算负荷 .....................................3
1.2.1单台机械负荷计算 ..................................3 1.2.2车间计算负荷统计 ..................................7 1.3无功功率补偿及其计算 ...................................9
1.3.1 无功功率的人工补偿装置 ..........................9 1.3.2 并联电容器的选择计算 ............................9
第2章 变压器的选择 ........................................... 12
2.1变配电所所址选择 ...................................... 12
2.1.1变配电所所址选择的一般原则 ................... 12 2.2负荷中心的确定方法 ................................... 13 2.3变电所主变压器的选择 ................................. 15
2.3.1确定变压器容量、台数的原则 ................... 15 2.3.2变压器的损耗 ..................................... 17
第3章 电气主接线及其设计 .................................... 20
3.1电气主接线方案的选择 ................................. 20
3.1.1主接线的设计原则 ................................ 20 3.1.2电气主接线 ....................................... 21 3.2短路计算的计算 ........................................ 23
3.2.1绘制计算电路 ..................................... 23 3.2.2确定基准值 ............................... 23 3.2.3计算短路电路中各元件的电抗标幺值 ......... 23 3.2.4 K-1点(10.5kV侧)的各种计算 ............. 24 3.2.5 K-2点(0.4kV侧)的各种计算 .............. 25
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洛阳理工学院毕业设计(论文)
第4章 设备选择 ................................................ 28
4.1变电所一次设备的选择校验 ...................... 28
4.1.1各回路高压侧的分析 ....................... 28 4.1.2 10kV侧一侧设备的选择校验 ................ 29 4.1.3380V侧一次设备的选择校验 ................. 30 4.2配变电所所进出线的选择 ........................ 30
4.2.1 10kV高压进线的选择校验 .................. 31 4.2.2由高压配电室至各车变电缆的选择校验 ....... 31
第5章 二次保护与防雷 ......................................... 34
5.1配变电所二次回路方案的选择 .................... 34
5.1.1配变电所的电能计量回路 ................... 34 5.1.2变电所的测量和绝缘监察回路 ............... 34 5.1.3变压器的保护装置 ......................... 34 5.2配电所的防雷保护 .............................. 38
5.2.1防雷设备 ................................. 38 5.2.2防雷措施 ................................. 38 5.3接地与接地装置 ................................ 39 结论 ................................................. 41 谢辞 ................................................. 42 参考文献 ............................................. 43 附录 ................................................. 44 外文资料翻译 .................................................... 46
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