35KV降压变电所继电保护系统设计

论文编号:DQ319   论文字数:10954,页数:27
 摘要
 在工业生产自动化中，工厂高压供电和配电是一个工厂最基本的能源保证。即对总降压变配电所的设计要求在不断地提高，尽可能地使得电网和电力系统安全、经济、稳定的运行，才能保证工业生产和人身安全。本次设计的内容紧密结合实际，通过查找大量相关资料，设计出符合当前要求的变电所。设计中除采用了一些固定方式的保护和常规保护外，还采用微机保护，通过电力监控综合自动化系统，可以使变电站调度中心的人员及时掌握变电所的运行情况，直接对设备进行操作，及时了解故障情况，并迅速进行处理，达到供电系统的管理科学化、规范化、并且还可以做到与其他自动化系统互换数据，充分发挥整体优势，进行全系统的信息综合管理。并通过对设计原始资料的分析，全厂负荷的计算，选择相应的主变压器台数和容量，从而确定其具体的供电系统。再对其初选的系统进行相应的短路计算和高压设备的选择及校验，选择和校验高压线路，最后进行继电保护设置的说明。
关键词：继电保护，35kv变电所， 负荷计算， 微机保护， 短路电流，
  
 
 Abstract
  In the automation of industrial production, high-voltage power supply and power distribution are the most fundamental energy guarantee for a factory. That is to say, in order to make the systems of electric grid and electric power work safely, economically and stably as much as possible, the design requirements of the substation improve continuously, which is the only way to ensure industrial production and personal safety. This design is closely related to reality in order to design the suitable substation by studying a lot of materials. The design not only adopts some stable-form and general protections but also adopts PC protection. The synthetically automation system of electric power supervision, which can make workers on duty control the situation of substation timely, operate the equipments directly, know the breakdown and deal with it without delay, so that the system of power supply is scientific and standard in management. What’s more, it can exchange data with other automatic systems and give full play to whole advantage in order to manage information in all systems as a whole.  And through analyzing the original design materials, calculating the load throughout the factory and choosing the corresponding quantity and capacity of the main transformer, the concrete power supply system can be determined accordingly. Then for the primary system, not only the relevant short-circuit should be calculated but also the high-voltage equipments should be selected and examined. Meanwhile, the high-voltage circuit should also be selected and examined. Finally the relay protection of power system should be given explanation.
Key words: relaying protection,35kv transformer station,  Load forecasting PC protection,  electric calculation

目录
摘要  I
Abstract Ⅱ
第1章 前  言 1
1.1 课题背景 1
1.2 课题意义 1
1.3 设计主要内容 1
1.4 本文的组织结构 2
第2章 设计原始资料 3
2.1 设计依据 3
2.2 所址概况 3
2.3 设计规模 3
2.4 设计原始资料 4
第3章 变电所继电保护及配置 6
3.1 系统分析及继电保护要求： 6
3.2 本系统故障分析 6
3.3 变电所10kV中性点接地方式的确定： 6
3.4 本设计继电保护装置原理概述 7
3.4.1 10KV线路电流速断保护 7
3.4.2 10KV线路过电流保护 7
3.4.3 平行双回线路横联方向差动保护 7
3.4.4 变压器瓦斯保护 7
3.4.5 变压器纵联差动保护 8
3.5 主变压器继电保护装置设置： 8
3.5.1 35 kV进线保护配置 8
3.5.2 主变保护 9
3.5.3 10kV线路保护 9
3.5.4 10kV电容器保护 10
3.5.5 10kV接地变保护 10
第4章 变电所自动装置配置 12
第5章 主变继电保护整定计算、校验 14
5.1 主变  Y/△-11  全星形接线 14
5.2 差动保护单元 14
5.3 高后备保护单元 14
第6章 保护出口和保护电源 16
6.1 出口方式 16
6.2 信号出口方式 16
6.3 保护电源 16
第7章 防雷与接地设计 17
7.1 变电所的防雷保护 17
7.1.1 电力线路的防雷措施 17
7.1.2 变配电所的防雷措施 17
7.1.3 雷电侵入波的防护 19
7.2 变电所公共接地装置的设计 19
7.2.1 接地电阻的要求 19
7.2.2 接地装置的设计 19
总  结  21
致  谢  22
参考文献： 23
附录1 35KV降压变电所一次接线图 24
附录2消弧系统一次接线图 25
附录3保护配置图 26
附录4主变保护原理展开图 27