文档介绍：本科毕业设计(论文)
题目北京市琉璃河镇110kV变电站一次部分设计
摘要
变电站作为电力系统中的重要组成部分,直接影响整个电力系统的安全与经济运行。本论文中待设计的变电站是一座降压变电站,在系统中起着汇聚和分配电能的作用,担负着向该地区工厂、农村供电的重要任务。该变电站的建成,不仅增强了当地电网的网络结构,而且为当地的工农业生产提供了足够的电能,从而达到使本地区电网安全、可靠、经济地运行的目的。
本论文《北京市琉璃河镇110kV变电站一次部分电气设计》,首先进行原始资料分析,负荷计算,确定主变和电气主接线,然后进行短路电流计算,从三相短路计算中得到当短路发生在各电压等级的母线时,其短路稳态电流和冲击电流的值。再根据计算结果及各电压等级的额定电压和最大持续工作电流进行主要电气设备选择及校验(包括断路器、隔离开关、电流互感器、电压互感器等)。
最后,并绘制了电气主接线图、电气总平面布置图、防雷保护配置图等相关设计图纸。
关键词: 电气主接线设计,短路电流计算,电气设备选择,设计图纸
Abstract
Power system substation as an important part of the entire power system directly affects the safety and economic operation. To be designed in this paper is a step-down substation substation in the system plays the role of aggregation and distribution of electric energy, charged with the factory to the region, the important task of rural electrification. pletion of the substation will not only strengthen the local power work structure, but also for the local industrial and agricultural production provides enough power, so that the regional power grid so as to achieve safe, reliable and economic operation purposes.
The paper "Beijing coloured liulihe town110kv substation once part of the electrical design," the first original data through the analysis and selection based on total load of the substation main transformer, the main wiring under both economical and reliable, flexible operation requirements, select the main connection of two programs to be selected A parison, out of poor program to determine the main electrical substation connection program.
Second, the short-circuit current calculation, obtained from the three-phase short circuit calculation occurs when short-circuit the voltage level of the bus, its steady-state current and the impact of short-circuit current value. According to the results and the voltage level of voltage and maximum continuous operating current of the main electrical equipment selection and validation (including circuit breaker, disconnecting switch, current transformer,