论文总字数：27412字

摘 要

电力工业是国家命脉也是人民幸福的保障，作为国家基础建设和实力的基础，也是国家工业的重要支柱产业，随着国家经济的飞速提升和近现代工业建设的蓬勃发展，电力网络的设计越来越细节化、整体化，工厂对电量的需求快速增长，对供电质量、经济技术现状、供电的稳定性指标也迅速攀升，因此对电力联入设计也有了更全面的要求，建设电网系统也必须跟进，本课题发电厂的联入，对电力系统的平衡有功功率，提高运行中的可靠性、经济性有着深远影响。如何合理选择电厂的联入方式和联入地点，如何利用其优化电网的经济指标、发挥削峰填谷等作用，对提升电力系统的运行时的可靠性、提高发电质量、减少不必要的电能损耗等具有重大的现实意义。另外该设计对提高工程设计的能力是非常有帮助的。

本次设计的主要内容是两台五万千瓦水力电站的电力系统联入设计。

两台五万千瓦水力电站的电力系统联入设计包括主变台数、容量和型号的确定，确定如何连接电气主接线，用电设施和导体的抉择校验等等，最终确定并绘制配电装置形式。

此设计工作旨在测试和提高我对电力专业课程的掌握水平，提升我们对本专业课程的综合利用才能。

关键词：电气主接线；潮流计算；短路电流；设备选择

Design of two 50,000-kilowatt hydropower stations connected into the power system in FuXing

Abstract

Electric power industry is the foundation of the national economy, is an important pillar industry, it has to do with the country's rise and fall and the well-being of the people have a close relationship, with the development of economy and the rapid rise of the construction of modern industry, the design of the power supply system is more and more comprehensive, system, plant power consumption growing rapidly, the power quality, technical and economic conditions, the power supply reliability index also is increasing day by day, therefore also has a bigger, better for power supply design requirements. With the rapid development of the national economy, the construction of electric power must be followed up. The connection of the power plant in this project has a far-reaching impact on the balance of active power in the power system and the improvement of the reliability and economy of operation.It is of great practical significance to improve the operation reliability of power system, improve the quality of power and reduce the loss of power by how to reasonably select the connection mode and location of power plant, how to optimize the economic index of power network and how to play the role of peak load and valley filling.In addition, the design is very helpful to improve the ability of engineering design.

The main content of this design is two 50,000-kilowatt hydropower stations connected into the power system.

Design of two 50,000-kilowatt hydropower stations connected into the power system includes the determination of the number, capacity and model of the main substation, the determination of the main electrical wiring, the selection and verification of electrical equipment and conductors, etc., and the final determination and drawing of the distribution device form.

This design task aims to reflect our mastery of professional course knowledge and cultivate our ability of comprehensive application of professional course knowledge.

Key words: Main electrical connection，Load flow calculation，Short circuit current，Equipment selection

目录

第一篇 复兴两台五万千瓦水力电站的电力系统联入设计说明书 1

1.1对电厂所在电力系统的地位，作用和用户的分析 1

1.1.1电厂在电力系统的地位与作用 1

1.1.2对用户的分析 1

1.2区域电网有功功率的初步平衡 1

1.2.1有功功率平衡的目的 1

1.2.2有功功率平衡分析 2

1.3待建电厂接入电压等级的确定 3

1.3.1选择原则 3

1.3.2 结论 3

1.4 待建电厂主变台数，容量。型号的选择 3

1.4.1变压器台数的确定 3

1.4.2 变压器容量的确定 4

1.4.3变压器型式的选择 4

1.4.4 结论 5

1.5电厂接入方案的确定 5

1.5.1拟定电网的接线方案 5

1.5.2方案的初步选择 6

1.5.3投资的初步计算 7

1.5.4年运行费用 7

1.5.5结论 8

1.6 网络的潮流分布及电压计算 8

1.7 短路电流的计算 9

1.7.1计算短路电流的目的 9

1.7.2短路电流的计算条件 9

1.7.3 短路点的选取 9

1.8电气设备的选择与效验 9

1.8.1电气设备选择的原则 9

1.8.2断路器选择 10

1.8.3隔离开关选择 10

1.8.4电压互感器选择 11

1.8.5电流互感器选择 11

1.9对所选导线进行校验 11

1.9.1导线的机械强度校验 11

1.9.2导线的电晕校验 11

1.9.3按允许载流量校验导线截面积（发热校验） 12

1.9.4 本章结论 12

1.10典型程序的设计 12

1.10.1 设计思路 12

1.10.2 结构框图 12

1.10.3程序界面 14

1.11 总结 15

致谢 16

最后，再次向所有老师和同学表示由衷的祝福与感谢！ 16

参考文献 17

第二篇 复兴两台五万千瓦水力电站的电力系统联入设计计算书 18

2.1主变容量的确定 18

剩余内容已隐藏，请支付后下载全文，论文总字数：27412字