摘要随着现代科学技术的飞速发展，电力系统改革全方面实行，持续供电已经成为电力系统为社会服务的必然条件。在枢纽变电所中装设备用电源自投入装置，当工作电源出现故障，备用电源自动投入系统运行，即可立即恢复枢纽变电所对用户的供电。75807

本文在对枢纽变电所的备用电源自动投入装置的研究背景与意义、国内外现状以及具体某枢纽变电所备用电源案例分析的基础上，设计了其备用电源自投入。

首先，分析了枢纽变电所备用电源自投入设计的研究背景与意义、发展进程以及备自投技术国内、外现状；然后详细地叙述了备用电源自投入装置相关的基本概念、所需遵循的基本要求以及备用方式；再者给定一个变电所电气主接线，监测其各部分状态信息及运行参数，列出故障时可能发生的故障位置和倒闸操作的列表；接着选定PLC，画出PLC外部接口图，设计备用电源自动投入的硬件电路；最后进行枢纽变电所备用电源自投入的软件设计，用梯形图进行编程，通过对梯形图程序的操作，实现备用电源自投入的过程。

该论文有图5幅，表4个，参考文献20篇。

毕业论文关键词：枢纽变电所  备用电源  故障列表  PLC  梯形图

Self Input Design of spare Power Supply for Hub Substation

Abstract With the rapid development of modern science and technology, power system reform all aspects of implementation, continuous power supply has become the power system is a necessary condition for social services。 In the hub substation installed equipment power automatic input device, when a fault occurs in the power source of the whole system。 At the same time, standby power automatic system put into operation, you can immediately restore hub substation to the user of the power supply。

On the basis of the of hub change the standby power automatic input device of the research background and significance, the status quo at home and abroad and a specific hub substation standby power supply case analysis, design the standby power supply self investment。

First of all, this paper analyzes the list of hub substation standby power since it was put into the background and significance of the research on design, development process and technology investment and domestic, abroad; then in detail describes the standby power since it was put into the basic concepts of device, according to the basic requirements and standby mode; furthermore, given a electrical substation main wiring, monitoring the each part of the state information and the operation parameters, lists the failures may occur when the fault position and switching operation; then selected PLC, draw the external interface diagram of PLC, the design of standby power supply auto - switching hardware circuit; the hub substation standby power since it was put into the software design , using ladder diagram programming, through the ladder diagram program operation, to achieve the process of standby power input。

There are 5 figures, 4 tables and 20 references in this paper。

Key words: Hub substation  standby power supply  fault list  PLC  ladder diagram 

目  录

摘要I

AbstractII

目录-III

1 绪论1

1。1研究背景-1

1。2备用电源自动投入装置的发展-1

1。3备自投技术国内、外现状-3

1。4 设计主要内容3

2 备用电源自投装置概述--5

2。1备自投相关基本概念-5

2。2备用电源的接线方式-5

2。3备自投装置的基本功能-6

2。4 备自投装置遵循的基本要求7

2。5 硬件结构图8

2。6 本章小结9

3 案例分析及PLC选型10