河东降压变电所电气部分设计

电气自动化论文编号:ZD306  论文字数:25124,页数:72  有外文翻译

目 录
 第1章 绪 论 1
1.1 电力工业现代化 1
1.2 设计的主要内容 2
 第2章 变电所电力负荷计算 3
2.1 负荷计算的目的 3
2.2 负荷计算 3
2.3 无功补偿方案 4
 2.3.1 无功补偿装置的种类 5
 2.3.2无功补偿计算 6
 第3章 变压器台数和容量的选择 8
3.1 主变压器的选择 8
3.2 主变压器的确定 8
 3.2.1 主变压器台数的确定 8
 3.2.2 主变压器型式的选择 8
 3.2.3 主变压器容量的确定 9
 第4章 电气主接线方案的确定 11
4.1 电气主接线的概况 11
4.2 电气主接线基本要求 11
 4.2.1 主接线的设计原则 11
 4.2.2 电气主接线设计的基本要求 12
4.3 变电所主接线的选择 12
 4.3.1 220kV侧接线方式的选择与论证 12
 4.3.2 60kV侧接线方式的选择与论证 15
 第5章 短路电流计算 16
5.1 短路电流计算的目的 16
5.2 短路计算点的选择 16
5.3 三相短路电流冲击值的计算 17
 5.3.1 三相对称短路初步计算 18
 5.3.2 短路电流具体计算 21
 第6章 高压电气设备及载流导体选择 26
6.1 电气设备的选择原则 26
 6.1.1 电气设备选择的一般要求 26
 6.1.2 电气设备选择的一般原则 26
6.2 断路器的选择 27
 6.2.1 220 kV断路器侧选择 28
 6.2.2 60kV侧断路器选择 30
6.3 隔离开关的选择 32
 6.3.1 220kV侧隔离开关选择 33
 6.3.2 60kV侧隔离开关选择 34
6.4 电流互感器的选择 35
 6.4.1 220 kV侧电流互感器选择 37
 6.4.2 60kV侧电流互感器选择 38
6.5 电压互感器的选择 40
6.6 母线的选择 42
 6.6.1 硬母线的选择 42
 6.6.2 母线的选择 43
6.7 避雷器的选择 46
 6.7.1 避雷器的参数 46
 6.7.2 避雷器的配置 47
 6.7.3 220kV侧避雷器选择 48
 6.7.4 60kV侧避雷器选择 48
 6.7.5 变压器避雷器选择 48
 第7章 防雷保护及其配置 50
7.1 避雷针及其保护范围 50
 7.1.1 避雷针保护范围的计算 50
 7.1.2 避雷针接地的主要要求 51
 7.1.3 防雷保护的有关规定 52
7.2 直击雷过电压保护装置设计 52
7.3 侵入波及内部过电压保护设计 54
7.4 避雷针的定位及针距 54
7.5 单根避雷针的保护半径计算 55
7.6 多根等高避雷针的保护范围计算 56
 第8章 结 论 58
 参考文献 59
 致 谢 60
 附录I  电气主接线图 61
 附录II 防雷接线图 62
 附录III 英文文献 63

摘 要
 此次设计的题目是《河东降压变电所电气部分设计》，其主要任务是对220kV降压变电所电气部分初步设计。包括对电气主接线的确定，主要电气设备的选择，包括断路器，隔离开关，电流互感器，电压互感器，母线，站用变压器等。
 全论文除了摘要、毕业设计书之外，还详细的说明了各种设备选择的最基本的要求和原则依据。 变压器的选择包括：主变压器的台数、容量、型号等主要技术数据的确定；电气主接线主要介绍了电气主接线的重要性、设计依据、基本要求、各种接线形式的优缺点以及主接线的比较选择，并制定了适合要求的主接线； 短路电流计算是最重要的环节，本论文详细的介绍了短路电流计算的目的、假定条件、一般规定、元件参数的计算、网络变换、以及各短路点的计算等知识；高压电气设备的选择包括母线、高压断路器、隔离开关、电流互感器、电压互感器的选择原则和要求，并对这些设备进行校验和产品相关介绍 。而根据本论文所介绍的高压配电装置的设计原则、要求和60kV的配电装置，决定此次设计对本厂采用分相中型布置。继电保护和自动装置的规划，包括总则、自动装置、一般规定主变压器、母线等设备的保护，而变电所的防雷保护则主要针对避雷针和避雷器的设计。此外，在论文适当的位置还附加了图纸（主接线、防雷保护等）及表格以方便阅读、理解和应用。通过本次设计了解目前220kV变电站的实际配置，防雷保护和接地网的实际布置,同时也对以前学过的知识加深了理解。
 关键词：变电站；负荷计算；接线选择；配电系统；防雷保护
 
Abstract
 The topic that I design is that a topic designed this time is that " electric a part of  He Dong transformer substation is designed ", its main task is a preliminary design  of a part to the transformer substation of He Dong.Including to the electric sureness that mainly wire, the choice of the main electric equipment, including circuit breaker, isolate the switch, the mutual inductor of electric current, voltage mutual inductor, bus bar, stand with the voltage transformer and wait.
 Whole thesis besides summary graduate to design the book outside, returned the expatiation every kind of most   basic request that equipments choose with principle according to. The choice of the transformer includes: Main transformer use the main technique in number, capacity, model number...etc. in set data of the transformer to really settle; The electricity lord connected the line to introduce primarily the electricity lord connects the linear importance, design according to, the basic request, every kind of merit and shortcoming and lords that connect the line form connects the linear choosing more, the lord that combine to establish the in keeping with my plant the request connects the line; The short-circuit galvanometer is regarded as the most important link, this thesis introduced the calculating purpose in short-circuit electric current, assumption term, general provision, the calculation, network transformation of a parameter detailed, and each calculation etc. knowledge that short circuit order; The choice of the high pressure electricity equipments includes the mother line, high pressure breaks the road machine and insulate the switch, electric current to feels with each other the machine, electric voltage feels with each other the choice principle of the machine, high pressure switch cabinet with request, and proceed to these equipments the school check with the related introduction in product. But go together with the design principle of the electricity device, request to go together with the electricity device with 220/60 kV according to this thesis a high pressure for introducing, decide this time design to adopt the cent the mutually medium-sized arranging to the my plant. After electricity protection with the programming of the automatic device, include total, automatic device, general provision with the protection of generator, transformer, mother line etc. equipments, but power plant with change to give or get an electric shock a design for defending thunder protecting then primarily aiming at lightning rod with lightning arrester. In addition, return in the appropriate position in thesis additional diagram paper ( the lord connects the line diagram, plane chart defend thunder protection disgram, Cross section diagram etc.) and forms read, comprehend with the convenience with applied.
 
 Key words：Transformer substation；Power system ；Mainly wire；power transmission systems