10KV变电所的电气部分及继电保护

文档编号:JD102    字数:24701,页数:61

摘要
本次设计是针对10KV变电所的电气部分及继电保护而进行设计的。
电气设计主要是根据原始资料所提供的有关情况，并考虑到变电所在电力系统中所处的地位其所处的地理环境及其电能的输送情况，通过分析并经过技术经济比较，确定出合理的电气主接线方案，选择适当的电气设备。
继电保护部分是本次设计的重点。10KV属于中压配电网，它延伸至用电负荷的中心或居民小区内，直接面对工矿企业和居民等广大用户的供电需要，起着承上启下确保用户供电的作用，因此10KV配电网所处的地位十分重要，在配电工程中，能否保证系统安全、经济、可靠的运行，工程的设计质量是一个重要条件。
另外，本次设计还配有二张图，一张供电系统图，另一张为继电保护及其自动装置配置图。

关键词：电气主接线 继电保护 整定计算 自动装置

Abstract
The design is for 10 KV regional electrical substation and part of the relay and design.
Electrical design are mainly based on raw data provided by the situation and taking into account the substation in the power system in which the position in which its geographical environment and its power transmission, through a technical and economic analysis and comparison, determine a reasonable Electric Wiring the main programme, select the appropriate electrical equipment.
Protection is part of the focus of this design. 10KV belong to the pressure distribution network, which extends to the electricity load centres or residential area, directly face the industrial and mining enterprises and residents and other users of electricity needs, to ensure that users connecting link between the preceding play the role of power supply, power distribution network by 10 KV The position is very important, the power distribution projects, can guarantee security, economic and reliable operation, the design quality is an important condition.
In addition, this design also has two plans, a power supply system maps, another for the protection and automatic device configuration map.
Key phrase: The main electrical wiring  relay  setting calculation   automatic device

目  录
摘要 .....................................................................I
Abstract ................................................................II
第一章 绪论...............................................................1
1.1选题意义...............................................................1
1.2 国内外发展概况........................................................1
1.3原始资料 ..............................................................2
第二章 电气主接线部分.....................................................4
2.1主接线的基本要求.......................................................4
2.2接线方式...............................................................4
第三章 负荷统计及变压器的选择 ............................................7
3.1负荷计算 ..............................................................7
3.2主变压器选择.......................................................... 8
第四章 短路电流计算 .....................................................10
4.1短路的原因 ...........................................................10
4.2短路的种类............................................................10
4.3短路的危害 ...........................................................11
4.4研究短路的目的 .......................................................11
4.5进行短路计算的基本假设 ...............................................12
4.6计算步骤 .............................................................12
4.7短路电流所用方法 .....................................................12
4.8网络的等值变换与简化..................................................12
4.8.1利用对称性化简网络 .................................................12
4.8.2分布系数法 .........................................................13
4.8.3短路点电流计算接线图 ...............................................13
4.9电器设备的选择........................................................16
4.9.1电器设备选择原则及选择、校验条件....................................16
4.9.2按故障情况进行校验 .................................................17
第五章 继电保护设计 .....................................................18
5.1电力系统保护的作用 ...................................................18
5.2继电保护装置的构成及对其基本要求 .....................................18
5.3电力变压器的保护方式 .................................................20
5.3.1电力变压器的故障类型、异常工作情况和继电保护方式....................20
5.3.2变压器的故障类型....................................................21
5.3.3变压器的异常工作情况................................................21
5.3.4变压器应装设的继电保护设置..........................................21
5.4变压器的差动保护......................................................22
5.4.1构成变压器差动保护的基本原则........................................22
5.4.2变压器差动回路不平衡电流的分类......................................24
5.5.3各种变压器主保护的讨论..............................................27
5.6三段式电流保护 .......................................................29
5.7变压器的瓦斯保护......................................................32
5.8母线保护..............................................................34
5.8.1母线保护原理及分析..................................................34
5.8.2母线保护研究的关键问题 .............................................38
结 论 ...................................................................39
致 谢 ...................................................................40
参考文献................................................................ 41
附录1 ...................................................................42
附录2 ...................................................................49

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