110kv降压变电站设计毕业论文设计.docVIP

摘 要 本次的毕业设计是110kV工业区降压变电站的设计，该变电站位于新城区，是工业集聚区负荷中心的新建变电所，整个设计分为两部分，电气一次部分和二次部分。电气一次部分的主要内容有：变电所总体分析、负荷分析计算与变压器选择、电气主接线设计、短路电流计算及电气设备选择、配电装置及电气总平面布置设计和防雷保护设计。电气二次设计主要内容有：三个电压等级线路保护整定计算、变压器和电容器保护整定计算。 在这次设计中，我通过总体分析与负荷分析对主变进行选择，在满足可靠性、经济性和灵活性的条件下进行主接线的选择，通过短路电流的计算对主要电气设备进行选择和校验，根据变电所设计规范选择配电装置、电气总平面和防雷设计，然后进行了各电压级线路保护整定计算及变压器、电容器保护正定计算，最后用Auto CAD绘制了一次接线图和二次保护图。 关键词：变电站，变压器，电气主接线，设备选择，继电保护 Abstract The graduation project is to design industrial zone buck 110kV substation, the substation is located in the new city, and is the center of industrial agglomeration area load the new substation, the whole design is divided into two parts, the first part and the second part of the electrical. A portion of the electrical main content are: overall analysis substation, transformer load calculation and analysis to select the main electrical wiring design, short-circuit current calculation and electrical equipment selection, electrical distribution equipment and general layout design and lightning protection design. Secondary electrical design of the main contents are: three voltage levels line protection setting calculations, transformer and capacitor protection setting calculations. In this design, I passed the overall analysis of the main transformer and load analysis to choose, to meet the reliability, economy and flexibility in the choice of main wiring conditions, by calculating the short-circuit current selection of major electrical equipment and parity, according to the design specifications choose substation distribution equipment, electrical general plan and mine design, then the voltage level of each line protection setting calculation and transformers, capacitors, protective definite calculations, and finally drawing a wiring diagram and secondary protection map with Auto CAD. Key Words: substations, transformers, electrical main connection equipment selection，equipment selection, relay protection ：绪论 1.1 设计的目的和意义 1.1.1 变电站基础知识 本次的设计是110kV工业区变电站