发布时间 : 星期三 文章工厂供电毕业设计更新完毕开始阅读7aab100c4a7302768e993958
洛阳理工学院毕业设计（论文）
某机械厂供配电一次系统设计
摘 要
工厂供电是将从电力系统中获得的电能经过合理的传输变换，分配到工厂的车间里的用电设备上。伴随着社会的发展，工厂对电能的质量，供电可靠性以及经济性等要求也越来越高。工厂供电设计是否完善不仅影响工厂的生产，而且也反映到工厂供电的可靠性与安全生产上，它与企业的经济效益，设备安全运行以及工人的人身安全密切相关，因此，搞好工厂供电工作对于整个工厂的生产发展有十分重要的意义。
本设计是对工厂供电一次部分的设计，对工厂的负荷计算，短路电流计算，变电所变压器的选择，校验，无功补偿等进行了设计说明，该设计从全局出发，按照负荷性质，用电容量等做出了合理的设计。
关键词：配电线路 变压器 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）
The Design of Primary System of Total Step-down Substation
ABSTRACT
Power supply in factory is mean to electricity energy which is obtained from the power system is transferred reasonable, and it is distributed to the electric device of the factory floor. With the development of the society, the quality, reliability and economy demands of the electricity energy were increasing to the factory. Whether the design of the factory electricity supply is perfect not only affect the plant's production, but also reflects the reliability of power supply to the factory and safety, it is closely related to the economic benefit of enterprises, equipment, safe operation and safety of workers, it is important for the development of production for doing a good job of the factory power supply work.
This design is a part of power plant design, including of the plant load calculation, short circuit current calculation, and the choice of transformer substations, verification, reactive power compensation for the design specification, it make a reasonable designfollowed the load nature and electricity capacity ,standing on the overall situation.
KEY WORDS: distribution list，supply transformer，power load，short-circuit contact，electric apparatus
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洛阳理工学院毕业设计（论文）
目 录
前 言 ........................................................................................................... 1 第1章 负荷计算 ......................................................................................... 2
1.1 负荷概述 ......................................................................................... 2
1.1.1 负荷的概念 ........................................................................... 2 1.1.2 电力负荷的等级 ................................................................... 2 1.2 用电设备组计算负荷的确定 ......................................................... 3
1.2.1 按需要系数法确定计算负荷 ............................................... 3 1.2.2 车间负荷计算 ....................................................................... 7
第2章 变压器选择 ..................................................................................... 9
2.1 变配电所选址 ................................................................................. 9 2.2 车间变电所变压器选择 ............................................................... 10
2.2.1 变压器台数及容量选择 ..................................................... 10 2.2.2 计算电流 ............................................................................. 14 2.3 无功补偿及工厂总降压变电所设计 ........................................... 16
2.3.1 无功功率平衡及无功补偿 ................................................. 17 2.3.2 并联电容器的选择计算 ..................................................... 17 2.3.3 工厂总降压变电所设计 ..................................................... 18
第3章 变电所主接线设计 ....................................................................... 20
3.1 电气主接线选择及运行方式 ....................................................... 20
3.1.1 主接线设计原则与要求 ..................................................... 20 3.1.2 电气主接线确定 ................................................................. 21 3.2 短路电流计算 ............................................................................... 22
3.2.1 绘制计算电路 ..................................................................... 23 3.2.2 最大短路电流计算 ............................................................. 23 3.2.3 最小短路电流计算 ............................................................. 25
第4章 高压电网一次设备选择 ............................................................... 28
4.1 35kV架空线选择 .......................................................................... 28 4.2 10kV电缆选择 .............................................................................. 29
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洛阳理工学院毕业设计（论文）
4.2.1 假想时间tima的确定 ............................................................ 29 4.2.2 高压配电室至各车间电缆的选择校验 ............................. 29 4.3 母线选择 ....................................................................................... 32
4.3.1 35kV母线选择 .................................................................... 32 4.3.2 10kV母线选择 .................................................................... 33 4.4 电气设备选择校验 ....................................................................... 33
4.4.1 选择原则 ............................................................................. 34 4.4.2 电气设备和载流导体选择的一般条件 ............................. 34 4.4.3 35kV侧断路器选择 ............................................................ 35 4.4.4 电流互感器的选择 ............................................................. 36 4.4.5 电压互感器的选择 ............................................................. 37 4.4.6 熔断器选择 ......................................................................... 38 4.5 高压开关柜选择 ........................................................................... 39
4.5.1 35kV侧高压开关柜选择 .................................................... 39 4.5.2 10kV高压开关柜选择 ........................................................ 39
第五章 防雷及过电压保护 ....................................................................... 41
5.1 避雷器 ........................................................................................... 41 5.2 避雷器的选择计算 ....................................................................... 41
5.2.1 按额定电压选择 ................................................................. 41 5.2.2 按持续运行电压选择 ......................................................... 41 5.2.3 按雷电冲击残压选择 ......................................................... 41 5.2.4 按标称放电电流选择 ......................................................... 42 5.2.5 校核陡波冲击电流下的残波 ............................................. 42 5.2.6 按操作冲击残压选择 ......................................................... 42 5.3 变电所的防雷保护 ....................................................................... 43 结 论 ......................................................................................................... 44 谢 辞 ......................................................................................................... 45 参考文献 ..................................................................................................... 46 附 录 ......................................................................................................... 47 外文资料翻译 ............................................................................................. 51
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