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邵阳学院毕业设计（论文）

内容提要

众所周知，电力行业是国民经济的基础工业，它的发展直接关系到国家经济建设的兴衰成败，因此有“经济要发展，电力应先行”的口号。随着经济建设的发展，电力行业也必然要更好的发展，所以发电设备的容量越来越大，而电力行业的自动化程度也越来越高，相应的对系统的安全性，稳定性的要求也越来越高。

本次设计是我们在校期间进行的一次比较系统、具体、完整的颇为重要的设计，是一次比较综合的训练。本设计的主要内容是设计主接线并进行方案的技术经济比较，可靠性指标的定量分析计算，主变的选择，短路电流计算，电气设备的选择与校验，配电装置、厂用电、防雷保护及发电机和主变保护设计。本设计完成设计说明书和设计计算书各一份，英文原版翻译一份，绘制电气主接线图、平面布置图、断面图。

在完成此设计过程中，我们可以学习电力工程设计、技术问题研究的程序和方法，获得搜集资料、查阅文献、调查研究、方案比较、设计制图等多方面训练，并进一步补充新知识和技能。通过毕业设计，结合发电厂电气部分设计，进一步巩固所学的专业知识，提高理论联系实际的能力，为将来走向社会打下坚实基础。

关键词：电力系统、火力发电厂、主接线、电气设备

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邵阳学院毕业设计（论文）

Smmary

As everyone knows, the power industry is the fundamental industry of national economy, its development is directly related to the economic development of the country's success, it is \development, power should be the first\the development of the electric power industry is also bound to be better, so more and more generation capacity of equipment, and the degree of automation of power industry is getting higher and higher, to the corresponding security system, stability requirements are also getting higher and higher.

This design is for us during the period of school a more systematic, specific, complete important design, is a more comprehensive training. The main content of this design is the design of the main wiring and technical and economic comparison, quantitative analysis and calculation of reliability index, the selection of the main transformer, short-circuit current calculation, electrical equipment choice and verification, power distribution equipment, electricity, lightning protection and generator and main transformer protection design. This design completes the design specification and design calculations on each one, the original English translation a, draw the main electrical wiring diagram, layout, section map.

Upon completion of the design process, procedure and method we can study on technical problems of electric power engineering design, study, be collected information, consulting literature, investigation, comparison, design drawings and other aspects of training, and further add new knowledge and skills. Through the graduation design, combined with the design of electrical power plant, further consolidate professional knowledge, improve the ability of integrating theory with practice, for the future to lay a solid foundation for social.

Keywords: electric power systems, thermal power plant, the main wiring and electrical equipment

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目录

内容提要 ............................................................................................................ I Smmary ............................................................................................................ II 第一部分设计说明书 ....................................................................................... 1

1电气主接线设计 ............................................................................................ 1 1.1主接线的设计原则和要求 ........................................................................ 1 1.2电气主接线的设计 .................................................................................... 2 1.3发电机的选择 ............................................................................................ 5 1.4主变压器的选择 ........................................................................................ 5 2厂用电设计 .................................................................................................... 7 2.1厂用电设计的要求 .................................................................................... 8 2.2厂用电设计的原则 .................................................................................... 8 2.3厂用电接线的最终确定 ............................................................................ 9 3 短路电流计算 ............................................................................................. 11 3.1短路电流计算的目的和规定 .................................................................. 11 3.2短路计算步骤 .......................................................................................... 12 4电气设备选择与校验 .................................................................................. 15 4.1 电气设备选择的一般原则 ..................................................................... 15 4.2断路器的选择及校验 .............................................................................. 17 4.3隔离开关选择与校验 .............................................................................. 19 4.4电压互感器选择 ...................................................................................... 20 4.5电流互感器的选择与校验 ...................................................................... 22 4.6高压熔断器的选择与校验 ...................................................................... 23 4.7母线的选择与校验 .................................................................................. 24 4.8 500kV进出线的选择与校验 .................................................................. 26 4.9 接地开关的选择与校验 ......................................................................... 27 5配电装置设计 .............................................................................................. 29 5.1配电装置的分类及其要求 ...................................................................... 29 5.2配电装置的设计原则及步骤 .................................................................. 30 6防雷保护设计 .............................................................................................. 33