二次变电所计123.doc

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 Abstact This graduate design is a Substation Two Times Electrical Engineering (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, model 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 automatic 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 reasonable 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, 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 reque