[工学]35kV变电所毕业设计.doc

中文题目：**** 35kV 变电站电气部分设计 外文标题：THE DESIGN OF ELECTRICAL PART OF YUJIAN 35kV SUBSTATION 毕业设计（论文）共 页（其中：外文文献及译文 页） 图纸共 张 完成日期 20 年 * 月 答辩日期 20 年 6 月   随着电力行业的不断发展，人们对电力供应的要求越来越高，特别是供电系统的稳定 性、可靠性和持续性。然而电网的稳定性、可靠性和持续性往往取决于变电所的合理设计 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。出于这 几方面的考虑，本论文设计了一个 35kV 降压变电站，此变电站有两个电压等级，一侧是 35kV，另一侧是 10kV。本设计按照传统变电站的设计步骤进行设计，包括负荷计算，无功 补偿，变电站形式，变压器的选择，主接线设计，短路电流计算，一二次设备的选择和继 电保护设计以及防雷和接地等内容，同时对于变电站内的主设备进行合理的选型。 本设计选择两台主变压器，其他设备如断路器，隔离开关，电流互感器，电压互感器， 无功补偿装置和微机保护装置等等也按照具体要求进行选型、设计和配置，力求做到运行 安全可靠，操作简单、方便，经济合理，技术先进，具有扩建的可能性和改变运行方式时 的灵活性。使其更加贴合实际，更具现实意义。 关键词：变电站；变压器；负荷；短路电流；微机保护；防雷接地 Abstract With the continuous development of electric industry, the demand of power supply system is increasing, especially its stability, reliability and continuity. However，the stability, reliability and continuity of power net are determined by the power grid’s rational design and configuration of substation. A typical substation needs its requirement reliable, flexible, economic, rational and convenient for expansion. Taking the above aspects into consideration, the paper designs a transformer substation of 35kV which has tow level of voltage, one is 35kV, and the other is 10kV. This design has its steps be in accordance with traditional substation design. It contains load calculation, reactive compensation, substation form, the choice of the transformer, the design of the main connection, short circuit current calculation, choice and protection of the secondary equipment design, as well as lightning protection and grounding, etc. At the same time, this design rationally selects the mode of the main equipments in substation. This design chooses two main transformers. Other equipments, such as Circuit Breaker, Isolating switch, Current Transformer, Voltage Transformer, Reactive power compensation device, Protective Relay and so on, are also selected, designed and configured in accordance with specific requirements. The purpose is to make it safe and reliable t