基于plc的输电线路自动重合闸系统设计.doc

青岛理工大学琴岛学院本科毕业设计说明书（论文） PAGE PAGE \* MERGEFORMAT I PAGE \* MERGEFORMAT I 青岛理工大学琴岛学院本科毕业设计说明书（论文） 摘 要 随着可编程序控制器(PLC)技术的发展，由于其高可靠性、高性价比、广泛的工业现场适应性和方便的工艺扩展性能，PLC在电力系统的控制过程中得到了越来越广泛的应用。目前，可编程逻辑控制器（PLC）的应用，解决了存在的诸多问题。PLC功能强大，以它为自动控制的核心，能够将逻辑控制、过程控制和运动控制这三控集于一体，可方便、灵活地组合成不同规模和需求的控制系统，以实现现代多功能自动控制。 现代电力系统日趋复杂,电压等级的升高,系统出现问题的可能性比以往有所增加,因此,必须有足够的措施保障系统的安全,将电力系统出现故障时所造成的损失减到最低,继电保护技术是各种安全措施保护功能中最为重要的一种。高压输电线路自动重合闸功能作为电力系统继电保护装置保护功能的重要组成部分。它在保证系统安全、稳定和经济运行等方面起着非常重要的作用。 针对输电线路常出现暂时性的故障，为提高供电的可靠性，在线路上须装设自动重合闸装置。为保证触头开断过程的电弧总能量最小，要求实行定相合闸，通过芯片KJ008在获取电压的过零信号后产生触发脉冲，选用FX2N-32MR型PLC为控制模块，编写PLC程序，控制断路器的合闸时刻。 关键词：自动重合闸；可编程逻辑控制器；电力系统；KJ008 PAGE \* MERGEFORMAT PAGE \* MERGEFORMAT I PAGE \* MERGEFORMAT II PAGE \* MERGEFORMAT II Abstract With the development of technology of programmable logic controller, and because of its high reliability, high ratio of performance to price, PLC has found more and more broad adaptability in industry spot and convenient technique expansibility, so PLC become more and more abroad in the automation process control in high-voltage breaker. At present, the programmable logical controller (PLC) application has solved existence many problems. Programmable Logic Controller (hereafter abbreviated as PLC), has powerful functions. As a core of automation of power system, it combines logic control, process control and motion control, and can be easily and flexibly organized into a control system on different scales to meet various requirements. So, the control system is multi-functional and modern. With the modern electric system becoming more complicated and voltage grade keeping elevated，the probability that system comes forth some problems is increasing. Therefore, it is necessary for us to take adequate measures to ensure the security of the system and minimize the loss when the system fails to function. Relay protection technique is the most important one among diversified safety precautions. As the important part of relay protection devices