河南理工大学毕业论文110KV变电站设计

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摘要

本课题针对110kV变电站供电系统，结合国内外变电站综合自动化技术的发展现状，根据变电站的监控要求，对110kV变电站自动化系统进行了设计。在系统研究过程中，重点进行了以下工作：

首先，讲述了国内外变电站综合自动化的发展情况，研究变电站自动化的目的和意义，提出本论文变电站自动化系统研究设计的内容。其次，根据变电站原始资料和监控要求，以及变电站自动化系统的设计原则，研究设计变电站自动化体系结构和功能。再次，根据所给出的原始数据，综合变电站设计的原则和国家法律法规、制度，以及变电站的监控要求，设计变电站的主回路接线；进行了变电站负荷的简要计算然后选择了基本设备。随后，简述PLC的工作原理和设计PLC自动控制系统的过程；阐述高压断路器控制的重要性和PLC控制断路器的优势，设计利用PLC控制高压断路器；综合变压器备用投切的重要性和操作过程，设计PLC控制的变压器备用自投系统。最后，总结了本论文的设计内容及设计过程，总结了设计存在的问题和缺陷，以及以后努力的方向。

关键词：变电站；PLC；高压断路器；备用自动投切

ABSTRACT

This topic is for 110kV substation power supply system, combined with the development of substation automation technology at home and abroad. According to transformer substation monitoring requirements, 110kV substation automation system is for design. And

the study is summarized as the follow steps．

First of all, covers domestic and foreign development of substation automation, purpose and significance of the research on substation automation, brings out the design of substation automation system. Secondly, according to the Sourcebook of substation and monitoring requirements, and substation automation system design principles, research and design the automation system’s structure and function. Third, according to the original data, integrating principles of substation design and national laws and regulations, systems, and the substation monitoring requirements, design the main circuit wiring of substation; simple calculations to select the basic equipment of substation load. Fourth, outline the operation process of PLC and design the PLC control system; according to the importance of high-voltage circuit breaker control and PLC control circuit breaker’s advantage, design using PLC control to high voltage circuit breaker; based on the importance of integrated bus coupling spare switching and operational processes, design the PLC control system of automatic bus transfer system. Finally, draw a conclusion of the paper's design and design process, sum up the problems and defects in design, and where to work toward.

Keywords: Substation; PLC; High-voltage Circuit Breaker; Alternate Device

Auto-switching

1 绪论 ................................................................................................................................ 1

1.1 变电站综合自动化概述 ..................................................................................... 1 1.2 国内外变电站综合自动化现状及发展 ............................................................. 1

1.2.1 国外变电站自动化技术的现状及发展 .................................................. 1 1.2.2 国内变电站自动化技术的现状及发展 .................................................. 2 1.3 变电站综合自动化研究目的与意义 ................................................................. 3 1.4 课题研究的主要内容 ......................................................................................... 4 2 变电站自动化系统总体设计 ........................................................................................ 5

2.1 变电站自动化系统原始资料及分析 ................................................................. 5 2.2 变电站自动化系统总体设计 ............................................................................. 8

2.2.1 变电站自动化系统总体结构 .................................................................. 8 2.2.2 变电站自动化系统的功能 .................................................................... 12 2.3 本章小结 ........................................................................................................... 14 3 变电站接线设计 .......................................................................................................... 15

3.1 变电站主回路接线 ........................................................................................... 15

3.1.1 变电站主回路电气主接线 .................................................................... 15 3.1.2 变电站设计数据计算 ............................................................................ 19 3.2 变电站设备选择 ............................................................................................... 26 3.3 本章小结 ........................................................................................................... 32 4 变电站自动化系统设计 .............................................................................................. 33

4.1 PLC控制系统 .................................................................................................... 33 4.2 PLC控制高压断路器 ........................................................................................ 35

4.2.1 控制基本要求 ........................................................................................ 35 4.2.2 控制接线 ................................................................................................ 36 4.2.3 控制过程分析 ........................................................................................ 38 4.2.4 PLC控制程序 ......................................................................................... 39 4.2.5 小结 ........................................................................................................ 39 4.3 PLC控制变压器备用自投 ................................................................................ 39

4.3.1 变压器备用自投 .................................................................................... 40 4.3.2 控制接线 ................................................................................................ 42 4.3.3 控制过程分析 ........................................................................................ 43 4.3.4 PLC控制程序 ......................................................................................... 45 4.3.5 小结 ........................................................................................................ 46 4.4 本章小结 ........................................................................................................... 46 5 总结与展望 .................................................................................................................. 47 致谢 .................................................................................................................................. 48 参考文献 .......................................................................................................................... 49 附录 .................................................................................................................................. 51

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