基于PLC220KV变电站的自动化控制及其继电保护毕业论文.doc

郑州大学电气工程学院毕业设计（论文） PAGE I PAGE III 贵州师范大学（本科） 毕业论文 论文题目：基于PLC220KV变电站的自动化控制及其继电保护 学院：机械与电气工程学院 专业：电气工程及其自动化 题目：基于PLC220KV变电站的自动化控制及其继电保护 摘要 变电站综合自动化对于保证供电可靠性和电能质量，对于电力系统的安全、稳定运行具有极其重要的作用。本毕业设计以车江变电站现有设备为参考，通过引入PLC设计了一个变电站综合自动控制和继电保护系统。 本设计在学习变电站综合自动化系统的基本概念，学习数据通信、可编程控制器和触摸屏相关知识的基础上，对基于SIMATIC S7-300 PLC的变电站综合自动化实际系统进行初步的硬件结构设计和软件设计。并以断路器控制、中央信号系统为具体研究对象，由SIMATIC S7-300 PLC和计算机、触摸屏组成硬件系统，实现了PLC和触摸屏之间的通信，编写了PLC和触摸屏程序，实现了断路器控制和中央信号系统的基本功能，以及通过对继电保护的电气元件的选择实现其保护的功能。 关键词 变电站；综合自动化；可编程控制器；触摸屏；继电保护 Abstract Integrated substation automation plays an important role in guaranteeing the power supply reliability and quality of electric energy, the security and stable operation of power systems. The graduation design in the transformer substation equipment for the CHEJIANG, through the introduction of PLC designed a substation integrated automatic control and relay protection system. On the basis of studying the basic concepts of integrated substation automation system, the relevant knowledge of data communication, PLC and touch panel, the initial hardware structure and software of integrated substation automation system based on SIMATIC S7-300 PLC is designed. And circuit breaker control, the central signal system for specific subjects, by SIMATIC S7-300 PLC and computer, touch panel consisting hardware system, the communication between PLC and touch panel is implemented, the procedures of PLC and Touch panel are prepared, circuit breaker control and the central signal systems basic functions are implemented，And through to the relay protection of electrical components choice to realize its protection function. Keywords transformer substation, integrated automation, programmable controller, Touch panel，Relay protection 序言 本文是关于220KV榕江县车江变电站现有设备为参考，对其自动控制系统及继电保护系统设计。该系统是尽量实现少人的值班，通过对变电站内的二次设备及控制系统软、硬件的重新组合、优化，实现对变电站全部设备的运行情况执行监视、测量和自动化的管理。提高安全