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本文详细介绍了*****新北区希望化工厂35kV总降变电所的设计。文中对主接线的选择、高压设备的选择、负荷计算、短路电流计算,各种继电保护选择和整定计算皆有详细的说明。特别对主接线的选择,变压器的选择,还有一些电气设备如断路器、电流互感器、电压互感器等的选择校验作了详细的说明和分析。其中还对变电所的主接线，平面布置，高低压侧的一些保护装置等通过CAD制图直观的展现出来。
本次设计的内容紧密结合实际，通过查找大量相关资料，设计出符合当前要求的变电所。设计中除采用了一些固定方式的保护和常规保护外，还采用微机保护，通过电力监控综合自动化系统，可以使变电站内值班人员或调度中心的人员及时掌握变电所的运行情况，直接对设备进行操作，及时了解故障情况，并迅速进行处理，达到供电系统的管理科学化、规范化、并且还可以做到与其他自动化系统互换数据，充分发挥整体优势，进行全系统的信息综合管理。
在本次设计中，得到了学校老师、同学的耐心指导和大量帮助，在此对他们表示衷心的感谢和崇高的敬意。
关键词: 短路电流计算,继电保护,断路器，微机保护
This paper mainly introduces the design of 35kV substation in south city of *********. It also discusses the choice of main wiring, high pressure equipment and all kinds of the protection of relay, the calculation of load, short current and so on in detail, especially, the choice of main wiring, transformer and some electric equipment such as circuit breaker, current and Voltage sensor. It shows main wiring of substation, the distribution of plane and some protection equipment of high and low Voltage by the graphics of CAD.
This design is closely related to reality in order to design the suitable substation by studying a lot of materials. The design not only adopts some stable-form and general protections but also adopts PC protection. The synthetical automation system of electric power superVision, which can make workers on duty control the situation of substation timely, operate the equipments directly, know the breakdown and deal with it without delay, so that the system of power supply is scientific and standard in management. What’s more, it can exchange data with other automatic systems and giVe full play to whole adVantage in order to manage information in all systems as a whole.
Keyword: the calculation of short current, the protection of relay, circuit breaker, PC protection
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