zz-ay市郊110kv变电站设计.doc

ZZ-AY 市郊 110kV 变电站设计毕业设计(论文) AY 铁矿 35kV 变电站毕业设计专业: 电力系统继电保护与自动化姓名: 指导老师: 2016 年9月 28日 AY 铁矿 35kV 变电站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 AY 位于钢铁企业厂区内的新建降压变电站, 向铁矿区的 4 个分矿、选矿区、办公区和生活区等负荷供电。该变电站的线路规划是: 35kV 近期 2 回; 10kV 近期 6 回,远景发展 2 回。本论文首先通过对原始资料的分析及根据变电站的总负荷分析计算选择主变压器, 同时根据主接线的经济可靠、运行灵活的要求, 设计了变电站电气主接线方案。其次, 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。最后, 列出主要配电装置清单( 包括断路器、隔离开关、电流互感器、电压互感器等) ,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 AY 铁矿 35kV 变电站设计 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 isa newly built 110/10kV step-down substation substation in the factory ofa pany, supplies power to4 ore deposits in the iron ore district, mineral processing area, office area and living area , etc. The line planning of the substation is: 35kV near future two lines; 10kV six lines in the near future, the future development of two lines. The paper "110kv 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 Finally, make list of main power distribution devices(including circuit breaker, disconnecting switch, current transformer, voltage transfo