1、摘要 本次毕业设计以110kV变电站为主要设计对象， 该110kV变电站是地区重要变电站， 是电力系统 100kV 电压等级的重要部分。该变电站设有两台主变压器，站内主接线分为 110kV、35kV、10kV 三个电压等级。 本设计的第一章为绪论，主要阐述了变电站在电力系统中的地位，变电站设计的原 则的基本要求，并对原始资料进行分析。第二章是负荷计算及变压器的选择，根据已知 变电站的负荷资料对变电站进行负荷计算。通过得出的负荷结果确定了主变压器的台数 和容量、主变压器的型式。第三章是变电站主接线的设计，分别通过对 110kV、35kV、 10kV 侧电气主接线的拟定与比较，选择出最佳的接线方式
2、。第四章是短路电流计算，首 先确定短路点，计算各元件的电抗，然后对各短路点分别进行计算，得出各短路点的短 路电流。第五章是电气设备的选择，电气设备包括断路器、隔离开关、熔断器、电流互 感器、电压互感器、母线、支柱绝缘子和穿墙套管。第六章是配电装置，主要对变电站 的配电装置进行设计选择。第七章是变电站的防雷和接地设计，对变电站装设避雷针、 避雷器和接地系统的设计。最后绘制出电气主接线图、配电装置布置图和防雷接地布置 图。 通过本次毕业设计， 本人对所学的专业知识进行了巩固， 提高了个人综合运用知识、 查阅分析资料、制定设计方案、精确理论计算的能力，培养了严谨的科学态度，锻炼了 独立分析和解决问题
3、的能力。 关键词：变电站 电气主接线 电气设备 防雷接地 Abstract The graduation design with 110kV substation as the main design target, the 110kV substation is the main area substation, power system is the important part of 100kV voltage class. The substation with two main transformers, the station main wiring is divided into
4、 110kV,35kV,10kV three voltage levels. The design of the first chapter is the introduction, mainly elaborated the substation position in the power system, transformer substation design principle of the basic requirements, and analyze the original data. The second chapter is the load calculation and
5、the choice of transformer substations, according to the known load data of substation load calculation. The third chapter is the transformer substation main wiring design, respectively, through the110kV,35kV,10kV side of the formulation of the main electrical wiring and comparison, the best choice o
6、f wiring mode. The fourth chapter is the short circuit current calculation, first determine the fault point, calculating each component reactance, and then all of the short point are calculated separately, the short circuit short circuit current. The fifth chapter is the choice of electrical equipment, electrical equipment including circuit breaker, isolating switch, fuse, current transformer, voltage transformer. The seventh chapter is the transformer substation lightning protection and gr
