文档介绍：本科生毕业设计(论文)
题目微机继电保护电磁兼容性研究
电气与自动化工程院(系)电气工程及其自动化专业
摘要
继电保护装置工作具有电磁干扰的变电站中,电力系统的安全、稳定极取决于它的电磁兼容水平、可靠性等因素。首先,微机保护装置已打破常规继电器的概念,正向网络化、智能化、控制、保护、测量和数据通信一体化发展,具有越来越复杂的计算机硬件、软件的设计,使得装置面对电磁干扰更敏感和脆弱,另一方面,变电站综合自动化转变为了“面向间隔(对象)设计”,电力系统逐渐认可并且推广“保护下放”模式,使位于主控制室内继电保护所遭受的传导性干扰及辐射性干扰比开关厂内的继电保护装置弱许多,微机保护的兼容性问题变得严峻。文章对在这种情况下如何提高继电保护的电磁干扰性能进行了研究。开始会对微机继电保护装置的构成与工作机理,干扰源的形成、特征及其传播到二次回路的途径进行介绍,然后分析了变电站与发电厂的高强度电磁空间辐射、电源电压不稳定、系统数字电路等引起的干扰情况下从硬件、软件两个方面介绍了保护装置的抗干扰设计技术。
关键字:微机继电保护装置;干扰源;抗干扰设计;可靠性
ABSTRACT
Protection devices work in extremely harsh substation ic environment, the level of patibility, reliability, and other factors on the security of the power system stability is extremely important. On the one hand, the puter protection device has broken through the concept of conventional relay work, intelligence, protection, control, measurement and munications integrated development puter hardware and software design more and plex, resulting in device more obvious sensitivity and vulnerability to ic disturbance, integrated substation automation, on the other hand, pleted a major shift "for interval (object) design", "protection Down mode power system to recognize and promote protection devices in the switch factory indoor relay conduction suffered interference and radiated interference than the main control puter patibility issues e very prominent. How to improve the EMI performance of the relay for this case study. Introduced the first puter relay protection devices constitute the working mechanism, the formation of the disturbance source characteristics of its spread to the secondary circuit means, and then analyze the substations and power plants, high-intensity ic space radiation, the supply voltage is unstable, the system digital circuits cause interference case from two aspects of hardware, software, anti-jamming protection device design technology.
Keywords: puter relay protection device; EMI; Anti-jamming design; reliability
目录
第一章引言 1
电磁兼容概述 1
变电站中的电磁兼容环境 1