WMZ-41A型微机保护原理及应用(毕业论文).docVIP

专科生毕业设计（论文） 题 目：WMZ-41A型微机保护原理及应用 学生姓名： 系 别： 电气信息工程系 专业年级： 指导教师： 年 月 日 摘要 微机继电保护指的是以数字式计算机（包括微型机）为基础而构成的继电保护Abstract What the microcomputer relay protection refers to is take the digital computer (including miniature machine) as the relay protection which the foundation constitutes. The bus protection is guaranteed that the electrical network safe steady operation the important system equipment, its security, the reliability, the sensitivity and the rapidity to guaranteed the entire region electrical networks security has the decisive significance. Widely applies the mother in the electrical network to unite the current ratio type differential motion protection, the current phase comparison-like differential motion protection, the ratio brake type differential motion protection, but speaking of adaptation bus bar aspects and so on movement way, breakdown type, transition resistance, without doubt is misses the protection effect according to the phase splitting electric current differential motion principle constitution ratio brake type mother to be best. WXH-802 constitutes the entire line by the synthesis from the directional element and zero foreword directional element to speed the main protection, is away from and the touchdown distance as well as by the triadic interaction the zero foreword direction of current protection constitution reserve protection; And has the synthesis to switch on again. Key words: The microcomputer protection, the voltage transformer, the mother misses the protection 目录 前言………………………………………………………………………………… 4 第一章 微机继电保护的特点……………………………………………………… 5 第二章 WMZ-41A型母差保护改造………………………………………………… 6 2.1 WMZ-41A微机母线保护……………………………………………… 6 2.2 WMZ-41A微机母差保护的问题及改进方法………………………………… 8 第三章 红托线微机保护改造 …………………………………………………… 9 3.1 红托线微机保护的特点 …………………………………………………… 9 3.2红托线微机保护的问题及改进方法………………………………………… 10 第四章 110kV、220KV母线电压互感器改造……………………………