电气工程及其自动化专业毕业论文--110kV降压变电站一次设计.docVIP

摘 要 随着工业时代的不断发展，人们对电力供应的要求越来越高，特别是供电的稳定性、可靠性和持续性。然而电网的稳固性、可靠性和持续性往往取决于变电站的合理设计和配置。一个典型的变电站要求变电设备运行可靠、操作灵活、经济合理、扩建方便，只有这样的变电站才能为国民经济服务，为社会创造效益。出于这几方面的考虑，本次毕业设计内容为110kV降压变电站的一次设计。论文首先根据原始资料提供的负荷数据，分析负荷的增长趋势，从负荷计算结果确定主变压器台数，容量及型号，通过对变电站的安全、经济及可靠性方面考虑，比较有可能的主接线方案，根据经济可靠，运行灵活的原则确定适合的主接线设计方案；然后进行短路电流计算，计算出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，包括断路器、隔离开关、互感器、母线及无功补偿装置的选择；最后介绍接地保护装置及防雷保护的设计。 关键字：变电站设计； 短路计算； 设备选择； 校验 Abstract Along with industry time unceasing development, the people are more and more high to the electric power supply request, specially supplies power robustness, reliability and endurance.However the electrical network robustness, the reliabilityand the endurance are often decided by the transformer substation reasonable design and the disposition.A typical transformer substation requests to change the electricity equipment movement reliable, only then such transformersubstation can serve for the national economy, creates the benefit for the society.Stemming from these aspect consideration, this graduation project content is a 110kV voltage dropping resistor transformer substation design.The paper first acts according to the load data which the firsthand information provides, the analysis load growth tendency.From the load computed result determination main transformer Taiwan number, compared with has the possibility main wiring plan, is reliable according to the definite economy, then carries on the short-circuit current computation, calculates the short circuit steady current and the surge current value.Again and the most greatly continually operating current carries on the main electrical equipment according to the computed result and various voltages rank rated voltage, finally introduces the earth protective device and the anti-radar protection design. Key words: 110kV voltage dropping resistor transformer substation; Short circuit computation; Equipment choice; Verification 目录 1设计任务书 1 1.1 设计题目 1 1.2 待建变电站的基本资料 1 1.3 用户负荷统计资料 1 1.4 设计任