摘要：工业企业对供电可靠性及电能质量的要求越来越高。电能供电质量水平要求的进一步提高，对电网供电可靠性也提出更苛刻的要求。电力系统中通常采用继电保护装置实现纵联差动保护来快速准确的操作分支运断路器切除输电线路故障或事故分支节点，防止事故的进一步扩大。

    本文设计基于PLC的自动重合闸设计，该设计利用自动重合闸装置在线路发生故障通过继电保护装置跳闸后，延时操作断路器重新合闸以恢复输电线路供电，提高输电线路综合供电质量水平。PLC是一种性能较好的控制器，该设计利用PLC实现自动重合闸，通过软件编程方式用内部逻辑关系代替实际的硬件连接线，从根本上简化动作的物理链条。PLC控制方式既克服了使用传统继电器所带来的种种弊端，又兼容传统继电器的设计思想和技术方案。而且PLC构成的自动重合闸装置调试简单，组态灵活，可靠性高，具有扩展性，且具有连线简单，工作可靠，便于调试、调整和维护，可实现远程通讯。这给自动重合闸装置提供了良好的发展平台。65792

毕业论文关键词：电力系统，继电保护，自动重合闸，PLC

Abstract: The reliability and power quality of the industrial enterprises are higher and higher. The power quality level of power supply is further improved, and the reliability of power supply network is also more demanding. Power system is usually used relay protection device implementation of longitudinal differential protection for fast and accurate operation branch transported circuit breaker transmission line fault or accident branch node excision, to prevent the accident further expand.

Designed in this paper based on PLC automotive reclosing devices design, the design with automotive reclosing devices fault occurring in the line through the relay protection tripping device, delayed operation circuit breaker re closing to restore transmission line power supply, improve the level of transmission line power supply integrated quality. PLC is a better performance of the controller, the design is the use of PLC to realize the automotive reclosing devices, through software programming with the internal logic relations instead of the actual hardware connection lines, radically simplified physical action chain. PLC control mode not only overcome the disadvantages of the traditional relay, but also compatible with the traditional relay design ideas and technology program. And PLC automotive reclosing devices debugging simple, flexible configuration, high reliability, and connection with simple, reliable work, convenient for debugging, adjustment and maintenance, which can realize remote communication. This provides a good development platform for automatic coincidence brake device.

Key words: Power System , Relay Protection , Automotive Reclosing Devices , PLC 

目   录

1 绪论 4

1.1 自动重合闸概论 4

1.2 国内外国自动重合闸的发展历史 4

1.3 本文研究课题的背景、概述及意义 5

1.4 本文所做的工作 6

2 自动重合闸介绍 6

2.1 自动重合闸的定义 6

2.2 自动重合闸的基本慨念 7

2.2.1 自动重合闸的作用 7

2.2.1 自动重合闸的要求 8

2.2.3 自动重合闸的选择原则 8

2.2.4 自动重合闸的启动方式