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1、江淮二次降压变电所设计 摘 要本次毕业设计是60kV二次降压变电所电气工程（部分）初步设计。 本次设计除了摘要、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。 根据毕业设计任务书的要求，设计过程中完成了主变选择、电气主接线的拟定、短路计算、电气设备选择、配电装置的规划、继电保护和防雷保护的规划等主要工作。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、基本要求、各种接线形式以及主接线的比较选择，并制定了适合本所要求的主接线。短路电流计算是最重要的环节，因为它是变电所许多重要电气设备选择校验的重要依据。本论文介绍了短
2、路电流计算的目的、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 。在被此设计中，我们对10kV线路进行了继电保护设计。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普通中型布置。变电所的防雷保护则主要针对避雷针和避雷器的设计。关键词 变电所，短路计算，设备选择，继电保护AbstactThis graduate design is a Substation Two Times Electrical Enginee
3、ring (part) Design. 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, mod
4、el number etc. Designing in the process completing lord changing choice, electricity lord connecting linear draw- up, short circuit computing, electricity equipments choosing, going together with electricity equipping, after give or get an electric shock the protection with the programming of the au
5、tomatic device with defend protective programming in thunder etc. For this year, electric power is in international community energy with economy develop of the function increases increasingly, it have become modern the society is practical the most widely and need the quickest energy.Change the rea
6、sonable design that give or get an electric shock are a with developments very constituting the part importantly.Inset 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, th
7、e 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 factory connects with the electricity the line includes: The factory connect
8、 the linear total request and factory to connect the line design with the mother line with the electricity. 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
9、 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 e
10、ach 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
11、, request to go together with the electricity device with 60 KV according to this thesis a high pressure for introducing, decide this time design to adopt the cent the usually medium-sized arranging to the my plant. power plant with change to give or get an electric shock a design for defending thun
12、der protecting then primarily aiming at lightning rod with lightning arrester. Key Words substation，Short circuit calculation ,the choice of the equipment，relay protectionI目 录摘 要IAbstactII第一篇 说明书11 变电所设计原则12 10kV线路导线的选择32.1按经济电流密度选择导线经济截面积32.2导线截面积选择的步骤33 主变压器容量、台数和型式的选择63.1变压器选择的规定63.2主变压器容量和台数的选择6
13、3.3变压器型式的选择74 补偿电容器的选择84.1 无功补偿装置84.2 电容器型号选择84.3 补偿前平均功率因数计算公式94.4变压器的功率损耗94.5补偿容量的计算94.6确定电容器台数94.7补偿后总平均功率因数计算公式105 电气主接线方案设计115.1 主接线设计原则115.2 主接线设计的基本要求115.3 电气主接线的选择126 短路电流的计算146.1短路的定义及发生短路的原因146.2计算短路电流的目的146.3短路电流的计算过程147 电气设备的选择177.1断路器的选择177.2隔离开关的选择197.3互感器的选择217.4避雷器的选择257.5高压开关柜的选择267
14、.6母线的选择278 继电保护308.1电力系统继电保护的作用308.2线路保护309 防雷保护329.1避雷针的装设原则及接地装置的要求329.2避雷针高度的计算32第二篇计算书341 选择10kV输电线路导线341.1选择高压设备厂出线架空线型号341.2选择陶瓷厂出线架空线型号351.3 选择玩具厂出线架空线型号361.4选择炼油厂出线架空线型号371.5 选择首饰加工厂出线架空线型号381. 6选择针织厂出线架空线型号391.7选择区小学出线架空线型号401.8选择海飞学院出线架空线型号412 选择主变压器的台数、容量、型号432.1计算输电线路的功率损耗432.2选择变压器型号453
15、 选择补偿电容器的容量、台数、型号463.1 .归算变压器高压侧功率463.2 计算无功补偿前系统的功率因数463.3.计算需要补偿的无功容量463.4.选择电容器464 电气主接线方案设计475 短路电流的计算485.1 画等值阻抗图485.2 求各元件等值电抗485.3 各点发生短路时的短路电流496 电气设备的选择506.1高压断路器的选择506.2隔离开关的选择516.3 电压互感器的选择526.4 电流互感器的选择536.5 避雷器的选择546.6 高压开关柜的选择556.7 母线的选择577 继电保护597.1 瞬时电流速断保护597.2 定时限过电流保护598 避雷针的选择608.1 保护半径计算608.2 保护范围最小宽度和最小高度的计算：60结 论62致 谢63参考文献64附 录65电气设备清单65江淮二次变电所设计第一篇 说明书1 变电所设计原则（1）待设计的变电所应根据变电所设计技术规程中有关条例来进行设计，以保证待设计变电所可以安全供电。（2）变电所的设计必须贯彻执行党的有关方针、政策。设计中不
