110kV降压变电站电气一次系统设计.doc

华北电力大学成人教育学院 毕 业 设 计(论文) 题 目 110kV降压变电站电气一次系统设计 系 别 专业班级 学生姓名 指导教师 二○一四年九月 110kV降压变电站电气一次系统设计 摘要 变电站是电力系统的一个重要组成部分，由电器设备及配电网络按一定的接线方式所构成，它从电力系统取得电能，通过其变换、分配、输送与保护等功能，将电能安全、可靠、经济的输送到每一个用电设备的转设场所。作为电能传输与控制的枢纽，变电站必须改变传统的设计和控制模式，才能适应现代电力系统、现代化工业生产和社会生活的发展趋势。随着计算机技术、现代通讯和网络技术的发展，为目前变电站的监视、控制、保护和计量装置及系统分隔的状态提供了优化组合和系统集成的技术基础。 本说明书以110kV变电站设计为例，论述了电力系统工程中变电站部分电气设计（一次部分）的全过程。通过对变电站的主接线设计，短路电流计算，主要电气设备型号和参数的确定，电气设备的动热稳定校验，备用电源的自动投入设计，无功补偿设计，防雷和过电压保护装置的设计以及电气总平面和配电装置的设计，较为详细地完成了电力系统中变电站的设计。 随着电力技术高新化、复杂化的迅速发展，电力系统在从发电到供电的所有领域中，通过新技术的使用，都在不断地发生变化。变电站作为电力系统中一个关键的环节也同样在新技术领域取得了充分的发展。 关键词：变电站；短路电流；动热稳定；输电系统；配电系统 A DESIGN OF ELETRIC SYSTEM FOR 110kV STEP-DOWN TRANSFORMER SUBSTATION Abstract The substation is an importance part of the electric power system, it is consisted of the electric appliances equipments and the Transmission and the Distribution. It obtains the electric power from the electric power system, through its function of transformation and assign, transport and safety. Then transport the power to every place with safe, dependable, and economical. As an important part of power’s transport and control, the transformer substation must change the mode of the traditional design and control, then can adapt to the modern electric power system, the development of modern industry and the of trend of the society life. The statement introduces the 110kV transformer of a campus design, discussed some electrical transformer substations design (one part) in power systems engineering of the entire process. Through the main transformer stations wiring design, short circuit current calculation , set the main electrical equipment models and the parameters, check electrical equipment moving and thermal stability, emergency power supply，without power compensation, design over voltage protection and mine devices, design general electric graphic and distribution devices flood. Lastly, completed substation design in power system. Along with the high and quick devel