毕业设计_电力变压器保护.doc

I 电力变压器保护摘要电力变压器是电力系统中不可缺少的重要设备,他的故障给供电可靠性和系统的正常运行带来严重的后果,同时大容量变压器也是非常贵重的元件,因此, 必须根据变压器的容量和重要程度装设性能良好的、动作可靠的保护元件。本文是笔者在阅读了大量专业资料、咨询了很多的专家和老师的前提下,按照指导老师所给的原始资料,通过系统的原理分析、精确的整定计算。做出的一套电力变压器保护方案。本文语言简练、逻辑严密、内容夯实。可作为从事电气工程技术人员的参考资料。关键词电力系统故障,变压器,继电保护,整定计算Ⅱ A BSTRACT The transformer is the essential equipment in the electrical power system .I ts breakdown might bring the serious influence to the power supply reliability and the system safe ly operation .At the same time the large capacity power transformer is the extremely precious equipment .T herefore .We must install the reliable relay protection installment according to the transformer capacity rank and the important degree . The article is about the relay protection of the transformer .I had consulted many experts and teachers before I finished the article . At the same time the massive specialized materials was consulted by me . It isnot diffcult to understand the aniztion of the article for readers . And the article will bring the usful help to rades who is working asa electrical engineer. Keywords Power System Fault Condition, Power Transformer, Relay Protection, Setting Calculation I 目录摘要………………………………………………………………………………………Ⅰ ABSTRACT ………………………………………………………………………………Ⅱ 1 绪论……………………………………………………………………………………………… 1 1 .1 课题背景………………………………………………………………………………………… 1 设计题目……………………………………………………………………………………… 1 毕业设计原始资料…………………………………………………………………………… 1 待保护变压器的在系统中的连接情况…………………………………………………… 1 设计任务………………………………………………………………………………… 1 继电保护的综述…………………………………………………………………… 2 电力系统的故障和不正常运行状态及引起的后果……………………………………… 2 继电保护的任务…………………………………………………………………………… 2 继电保护装置的组成……………………………………………………………………… 3 继电保护的基本要求…………………………………………………………………… 3 电力变压器故障概况………………………………………………………………………… 6 继电保护发展……………………………………………………………………………… 7 计算机化…………………………………………………………………………………… 7 网络化………………………………………………………………………………………… 8 保护、控制、测量、数据通信一体………………………………………………………… 9 智能化………………………………………………………………………………………… 9 2 短路电