文档介绍：毕业设计(论文)
题目: 110KV电力系统继电保护设计
学院: 电子信息学院
专业班级:电气工程及其自动化06级2班
指导教师: 职称: 教授
学生姓名:
学号:
摘要
本次设计任务旨在体现对本专业各科知识的掌握程度,同时检验本专业的学习成果。首先,根据毕业设计的要求,建立合理的电力系统,本次毕业设计以拟建110KV变电站为例。其次,根据毕业设计的主要内容,对110KV电力系统进行继电保护配置,并依据继电保护配置原理,对所选择的保护进行整定和灵敏性校验,确定保护方案。
本次毕业设计分为六个章节,第一章主要讲述电力系统继电保护概述,包括继电保护发展简史,继电保护的作用,继电保护的基本要求,继电保护的基本原理、构成和分类,简单叙述电力系统继电保护的基本情况;第二章变电站分析主要是对负荷的分析,主变压器台数、容量,绕组的连接方式,以及冷却方式的确定,最后是电气主接线的确定;第三章是系统短路电流的计算,包括短路电流的概念、种类,短路电流计算的目的,以及短路电流标幺值计算法;第四章线路保护,包括线路保护原理分析、保护整定计算和灵敏性校验,本系统采用单测电源网络相间短路的电流保护,包括电流速断保护,定时限过电流保护,简单实用;第五章变压器保护,包括变压器保护原理分析、保护整定计算和灵敏性校验,主保护采用的是纵联差动保护和瓦斯保护,两者结合做到优势互补,后备保护是过电流保护。第六章母线保护,包括母线保护原理分析、保护整定计算和灵敏性校验,本系统主要采用了完全电流差动保护,简单可靠。
关键词:短路电流,整定计算,灵敏度,继电保护
ABSTRACT
The design task is to reflect on the subjects of the professional knowledge levels, while testing the professional learning es. First, according to the requirements of graduation, to establish a rational system, this graduation design to the proposed 110KV transformer substation as an example. Secondly, according to the main content of graduation, on the 110KV power system relay protection, relay protection according the principle of conservation of the chosen sensitivity setting and checking, determine the protection program.
The graduation project is divided into six chapters, the first chapter describes an overview of power system protection, including the brief history of relay protection, relay protection, the role of the basic requirements of relay protection, relay protection of the basic principles position and classification, a brief description of the basic situation of the power system protection; second chapter of the main substation is a load analysis, the number of main transformers, capacity, winding connections, and cooling methods to determine, finally, determination of main electrical wiring ; The third chapter is the system short-circuit current calculation, including the concept of short-circuit current, type of short circuit current purposes of the calculat