沈阳工程学院毕业设计（论文）
中文摘要
电力系统专业的毕业设计是一次比较综合的训练，它是我们将在校期间所学的专业知识进行理论与实践的很好结合，运用理论知识和所学到的专业技能进行工程设计和科学研究，提高分析问题和解决问题的能力。在完成此设计过程中，我们可以学习电力工程设计、技术问题研究的程序和方法，获得搜集资料、查阅文献、调查研究、方案比较、设计制图等多方面训练，并进一步补充新知识和技能。本毕业设计论文是220/60KV一次降压变电所电气部分初步设计。为了保证供电的可靠性和一次性满足远期负荷的要求，按照远期负荷规划进行设计建设，从而保证变电所能够长期可靠供电。
根据毕业设计任务书的要求，综合所学专业知识及《变电所设计》等书籍的有关内容，设计过程中完成了主变选择、电气主接线的拟定、短路计算、电气设备选择、配电装置的规划、继电保护和自动装置的规划和防雷保护的规划等主要工作。在此期间，遇到的种种问题均通过反复比较、验算，并请教老师得以解决。毕业设计论文由设计说明书、设计计算书、一套图纸（电气主接线图、总平面布置图、配电装置断面图、防雷保护图）组成。内容较为详细，对今后扩建有一定的参考价值。
近年来，电力在世界各国能源和经济发展中的作用日益增长，它已成为现代社会实用最广、需要最快的能源。变电所的合理设计与建设是一个极其重要的组成部分。本次设计是通过本人的精心设计论证完成的。整个设计过程中，全面细致的考虑工程设计的可靠性、经济性、灵活性等诸多因素，最终完成本设计方案。通过完成此毕业设计论文，进一步领会我国电力工业建设的政策观念和经济观点，培养对工程技术、经济进行较全面的综合分析能力。
由于时间紧张和能力有限，此论文中难免会出现遗漏和错误，希望老师给予指点和更正。
关键词 电力系统，变电所，短路电流，电气设备
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和平220/60KV一次降压变电所电气部分初步设计
Abstract
The professional graduate in system in electric power design is once more synthesize of training, it is we will during the period of school a profession for learning knowledge proceed theories and practice very good combination, make use of the theories knowledge proceeds with a profession for learning technical ability engineering design with science study, increase analyze problem with problem-solving ability.In complete this design process, we can study the electric power engineering the design, investigative procedure in problem in technique with method, be collected information, checked the cultural heritage, investigate the research, project comparison and design the various training in etc. in graphics, combine further complement the new information knows with technical ability.
This graduate design thesis is a 220/60 KVs a declining to press to change to give or get an electric shock an electricity parts of first steps design.For the sake of dependable that guarantee the power supply with a request that contented long-term burthen, carries according to the forward the programming proceeding design developments, from but guarantee to change to give or get an electric shock can long-term dependable power supply.
Design the request of the mission book according to the graduate, synthesize a programming for learning profession knowledge and 《changing giving or get an electric shock the 》 designed waiting dogs- ear relevantly contents, designing in the process completing lord changing choice, electricity lord connecting linear draw- up, short circuit computing, electricity equipments choosing, going together with electricity equiping, after give or get an electric shock the protection with the programming of the automatic device with defend protective programming in thunder etc. main work.Here period, all kinds problems that meet all passes to compare, check to calculate again and again, and ask the can solution in teacher.Graduate to design the thesis from design the manual, design calculation book, a set of diagrams paper( the electricity lord connects the line diagram, total flat surface arranges the diagram and go together with electricity equip cross section diagram, defend thunder protection diagram) constitute.The contents is more detailed, to from now on extend to consults certainly value.
For this year, electric power is in international community energy with economy develop of the function increases increasingly, it have become modern the society is practical the most widely and need the quickest energy.Change the reasonable design that give or get an electric shock are a with developments very constituting the part importantly.
This design is at guiding teacher descend, passing oneself of design what argument complete with meticulous care.Whole design process inside, completely dependable, economic, vivid...etc. many factors that meticulous consideration engineering design, end complete this design project.
Pass to complete this graduate design the thesis, further appreciating the our country the
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沈阳工程学院毕业设计（论文）
policy idea of electric power industry developments with the economic standpoint, educates to proceed to the engineering technique, economy more completely to synthesize the analytical skill.
Because time strain with ability limited, this thesis inside difficult do not need to will appear the lapse with mistake, hope the teacher give to point out with make correction.
Key word electric power system substation short circuit computing
electricity equip
III
和平220/60KV一次降压变电所电气部分初步设计
目录
中文摘要 .................................................................... I ABSTRACT ................................................................... II 第一篇 说明书 ............................................................... 1 第一章变电所原始资料分析 .................................................... 1 1.1设计题目 和平220KV一次降压变电所电气部分初步设计 ..................... 1 1.2变电所条件 ............................................................ 1 1.3变电所60KV侧负荷表及电力系统接线图 ................................... 1 第二章 主变压器的选择 ...................................................... 3 2.1主变压器台数的确定 .................................................... 3 2.2主变压器容量及型式的确定 .............................................. 3 第三章 电气主接线的选择 ..................................................... 4 3.1设计原则 .............................................................. 4 3.2设计的基本要求 ........................................................ 4 3.2.1 可靠性 ............................................................ 4 3.2.2 灵活性 ............................................................ 4 3.2.3 经济性 ............................................................ 4 3.3变电所电气主接线的选择 ................................................ 5 3.3.1 220KV侧主接线的选择 ............................................... 5 3.3.2 60KV侧接线的选择 .................................................. 6 第四章 短路电流的计算 ...................................................... 8 4.1短路电流计算的目的 .................................................... 8 4.2短路的基本类型 ........................................................ 8 4.3短路电流计算的基本假定 ................................................ 8 4.4一般规定 .............................................................. 8 4.5计算步骤 .............................................................. 9 4.5.1 画等值电抗图 ...................................................... 9 4.5.2 选择计算短路点 .................................................... 9 4.6计算方法 .............................................................. 9 4.6.1 标么值法 .......................................................... 9 4.6.2 网络变换 .......................................................... 9 4.6.3 三相短路电流周期分量的计算 ....................................... 10 第五章 主要电气设备的选择 ................................................. 11 5.1一般原则 ............................................................. 11 5.2高压断路器的选择 ..................................................... 11
沈阳工程学院毕业设计（论文）
5.3隔离开关的选择 ....................................................... 11 5.4电压互感器的选择 ..................................................... 12 5.5电流互感器的选择 ..................................................... 13 5.6母线的选择 ........................................................... 15 5.6.1 母线的选择包括母线材料和母线截面的选择 .......................... 15 5.6.2 导体截面选择和校验 .............................................. 15 5.7避雷器的选择 ......................................................... 15 第六章 配电装置的设计 ..................................................... 17 6.1电气布置 ............................................................. 17 6.2配电装置设计原则 ..................................................... 17 6.3配电装置型式的选择 ................................................... 17 6.3.1 屋外配电装置的特点 ............................................... 17 6.3.2 屋外配电装置的种类 ............................................... 18 6.3.3 屋外配电装置的最小安全净距 ....................................... 18 6.3.4 屋外配电装置的若干问题 ........................................... 18 第七章 继电保护及自动装置设计 ............................................. 19 7.1继电保护配置的作用和要求： ........................................... 19 7.2变压器保护的配置 ..................................................... 19 7.3母线保护和断路器失灵保护 ............................................. 20 7.3.1 母线保护配置原则 ................................................. 20 7.3.2 双母线保护 ....................................................... 21 7.3.3 断路器失灵保护 ................................................... 21 7.4.1 220KV侧线路保护 .................................................. 22 7.4.2 60KV侧线路保护 ................................................... 22 7.5自动装置的规划设计 ................................................... 23 7.5.1 电力系统自动装置的设计 ........................................... 23 7.5.2 合闸装置应按下列规定装设 ......................................... 23 7.5.3 自动重合闸装置应符合以下要求 ..................................... 24 7.5.4 备用电源和备用设备自动投入 ....................................... 24 第八章 防雷保护规划设计 .................................................. 26 8.1变电所的保护对象 ..................................................... 26 8.2配电装置的防雷保护 ................................................... 26 8.3防雷设计要求和所需资料 ............................................... 26 8.3.1 雷电过电压保护情况 ............................................... 26 8.3.2 防雷保护设计所需资料 ............................................. 26 8.3.3 避雷针的选择 ..................................................... 26 第二篇 计算书 .............................................................. 27 第一章 主变压器选择的计算部分 ............................................. 27 第二章 短路电流计算过程 ................................................... 29