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论文编号:DQ246 论文字数:9736,页数:32
摘 要
电能是现代工业生产的主要能源和动力，是实现生产自动化的重要物质基础。随着工业电气自动化技术的发展，工厂用电量的迅速增长，对电能质量、供电可靠性以及技术经济指标等的要求也日益增高。电能既易于由其他形式的能量转换而来，也易于转换为其他形式的能量以供应用；电能的输送和分配既简单经济，又便于控制、调节和测量，有利于实现生产过程自动化。因此，电能在现代工业生产及整个国民经济生活中和国家经济建设中应用极为广泛。
本课题应用供配电设计的基本原则和方法进行工厂10kV变电所一次系统设计，在已有的专业知识的基础上，了解了当前我国变电所技术的发展现状及技术发展趋向，按照现代电力系统设计要求，设计一个10kV综合自动化变电所。
关键词：10kV变电所、一次系统、计算负荷
Abstract
Power is the major energy and power of the modern industrial production, an important material basis for achieving production automation. Along with the development of industrial electrical automation technology, plant of rapid growth of electricity consumption, the quality of the power, supply- reliability, as well as the technical and economic indicators are required for increasing. Power not only transform form other forms of energy easily, but also easily be converted to other forms of energy to supply; The transmission and distribution of electricity is very simple and economic, also easy to control, adjust and measure, it is favorable to realize automatic production process. Therefore, power is widely used in modern industrial productivity, the entire national economy life as well as the national economy construction.
This project used the basic principle of the power-supply design and its method to design the primary circuitry system in the 10kV substation of the factory, understood the development situation of substation technology and the technology development trend in our country on the basis of existing professional knowledge, according to the modern electrical system design requirements, design a 10kV integrated automation substation.
Key word: 10kV substation, primary circuitry system, the computational load
目 录
摘 要 II
Abstract III
1 前 言 1
2 设计原始资料 2
2.1 设计依据 2
2.2 气象及地质资料 3
2.3 当地电业部门提供的技术资料 3
2.4 供用电协议 4
3 负荷计算和无功功率补偿 5
3.1 负荷计算 5
3.2 低压侧无功补偿器的选择 7
3.3 主变压器选择 9
4 确定供电系统图 11
5 短路电流计算 12
5.1 绘制短路计算电路 12
5.2 求三相短路电流 12
6 高、低压设备选择 13
6.1 高压设备的选择 13
6.2 低压开关柜选择 14
6.3 低压断路器的选择与校验 15
7 配电线路选择 16
7.1 高低压母线的选择 16
7.2 低压出线的选择 16
7.2.1 按发热条件选择 16
7.2.2 校验电压损耗 17
8 保护整定计算 18
8.1 线路的过电流和速断保护 18
8.1.1 过电流保护 18
8.1.2 电流速断保护 19
8.2 变电所低压侧的保护装置 19
8.3 电力变压器的继电保护 20
8.3.1 过电流保护 20
8.3.2 电流速断保护 20
8.3.3 过负荷保护 21
9 变电所的防雷保护与接地装置的设计 22
9.1 变电所的防雷保护 22
9.2变电所的接地装置 23
10 总 结 25
致 谢 26
参考文献 27
附录：系统原理图 28
