某发电厂一次系统毕业设计论文.doc
文本预览下载声明
摘 要
电能是现代工业生产的主要能源和动力。电能既易于由其它形式的能量转换而来，又易于转换为其它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。Abstract
Electricity is modern industrial production of the main sources of energy and motive force. Electricity is easily by other forms of energy conversion, and easy to convert to other forms of energy supply, Electric power transmission and distribution is simple and easy control, economic regulation and measurement, conducive to the realization of automatic production process. With the wide application of power in the life of the power system, stable and reliable, economic increase, as for the production of electric power system design appears especially important. This paper designs a 4 x 220MW coal-fired power plants in China, is a system of power system, according to the main task of system design, the production of electric power plant and substation, pressure, transmission, distribution and use of safety, high quality, reliable and economical operation of the system, a design scheme. Main design content determination of form, mainly wiring the choice of main transformer, The short-circuit current calculation of main electrical equipment, the choice and calibration, including generatrix, circuit breakers, isolating switch, transformer, arresters, etc. Through the graduation design professional knowledge, and strengthened himself in a power system.
Key words: primary system; main connection line; short-circuit calculation; equipment choice
目 录
前 言 1
1 概述 2
1.1 原始资料 2
1.2 本课题的研究任务 3
2 电气主接线 4
2.1 电气主接线 4
2.1.1 主接线的设计依据 4
2.1.2 设计要求 5
2.2 电气主接线方式的比较 6
2.2.1 拟采用的主接线方式的比较 6
2.2.2 结论 7
2.3 主变压器台数和容量选择 7
2.3.1 具有发电机电压母线的主变压器 7
2.3.2 单元接线的主变压器 8
2.3.3 主变压器型式的选择 8
2.3.4 绕组数量和连接方式的选择 9
2.3.5 主变压器选择结果 9
3 短路电流计算 10
3.1 短路的一般概念 10
3.1.1 短路形成的原因 10
3.1.2 短路电流计算的目的 10
3.2 短路电流计算原则 11
3.2.1 短路电流计算的基本条件 11
3.2.2 接线方式 11
3.2.3 计算容量 12
3.2.4 短路种类 12
3.2.5 短路计算点 12
3.2.6 三相短路的计算方法 12
3.2.7 各个短路点进行具体分析 14
4 电气设备选择 15
4.1 一般原则及技术条件 15
4.1.1 设计规程对于设备选择的规定 15
4.1.2 原则 15
4.1.3 按正
显示全部