内容介绍

摘 要

由于电力系统的飞速发展对继电保护不断提出新的要求，电子技术，计算机技术与通信技术的飞速发展又为继电保护技术的发展不断注入新的活力。未来继电保护的发展趋势是向计算化，网络化及保护，控制，测量，数据通信一体化智能化发展。

本次毕业设计的主要内容是110kV电力系统继电保护的配置，并依据继电保护配置原理，对所选择的保护进行整定和灵敏性校验，确定方案中的保护。

计算系统的标幺值、短路电流，确定运行方式；确定各种设备的保护配置，包括变压器、母线、输电线、发电机等的保护配置。其中变压器保护主保护采用纵联差动保护和瓦斯保护，两者结合做到优势互补。后备保护是复合电压启动过电流保护。分析母线保护保护原理，采用了完全电流差动保护，简单可靠。

关键词：继电保护，标幺值，短路电流

Abstract

As the rapid development of power system relay protection have made new demands, electronic technology, computer technology and communication technology for the rapid development of relay technology has been to inject new vitality. The future development trend is to relay computing, networking and protection, control, measurement, data communications integrated intelligent development.

This graduation design is the main content of the configuration of 110kV power system protection and relay protection based on the principle of the conservation of the selected setting and sensitivity check to determine the program's protection.

Per unit value of computing systems, short-circuit current, determined operation mode; determine the protection of various equipment configurations, including transformers, busbars, transmission lines, generators and other protection configuration. One main protection transformer protection using differential protection and gas protection, a combination of both to achieve complementarity. Backup protection is complex voltage start over-current protection. Protection of busbar protection principle, using the full current differential protection, simple and reliable.

Keywords: Relay protection, per unit value, short-circuit current

目 录

前 言1

1 方案比较2

2 确定运行方式4

2.1 标幺值计算4

2.2 短路电流计算5

2.3 确定运行方式18

3 短路计算20

3.1 各种运行方式下各线路电流计算20

3.2 各输电线路两相短路和三相短路电流计算21

4 继电保护的配置23

4.1 继电保护的基本知23

4.2 变压器的保护配置25

4.2.1 变压器配置25

4.2.2 保护配置的整定29

4.3 母线的保护配置32

4.3.1 保护配置的原理32

4.3.2 电流差动保护配置的整定36

4.4 输电线路保护配置37

4.4.1 保护配置的原理37

4.4.2 保护配置的整定38

4.5 发电机保护配置45

4.5.1 保护配置的原理45

4.5.2 保护配置的整定46

结 论48

致 谢49

参考文献50