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1、龙湾二次60/10KV降压变电所继电保护部分初步设计The relaying design for electrical part of Longwan60KV step down substation 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60/10KV二次降压变
2、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、保护整定计算、配电装置的规划、继电保护和自动装置的规划等主要工作。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、保护配置图、保护展开图）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
3、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，在指导老师的帮助下，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。关键词 变电所, 短路计算，继电保护，保护配置AbstractThe professional graduate in system in electric power design is
4、 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, in
5、crease 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 compar
6、ison 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 60/10 KV a declining to press to change to give or get an electric shock an electricity parts of first steps design. For the sake of
7、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 m
8、ission 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, sh
9、ort circuit computing, electricity equipments choosing, going together with electricity equipping, 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 a
10、ll 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 togeth
11、er 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 increasin
12、gly, 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 a
13、rgument 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 p
14、olicy 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.Key words substation ,short circuit computing ,relaying ,Protect an allocation 目 录摘 要IAbstractII引 言1第一篇 说明书2第一
15、章 主变压器的选择2第二章 电气主接线的选择52.1 主接线的设计原则及基本要求52.2 本变电所主接线的选择6第三章 短路电流的计算说明93.1 短路电流计算的目的93.2 短路的基本类型93.3 短路电流计算的基本假定93.4 一般规定93.5 计算步骤103.6 计算方法10第四章 变电所继电保护配置114.1 变压器保护原则114.2 保护配置说明124.3 各种继电保护原理16第二篇 计算书28第一章 主变压器的选择计算部分28第二章 短路电流的计算302.1 各元件电抗计算公式302.2 系统计算电路图和等值电路图30第三章 变压器继电保护整定计算383.1 变压器继电保护整定383.2 变压器瓦斯保护整定383.3 变压器差动保护整定383.4 过电流保护的整定计算423.4 过负荷保护的整定计算43结 论44参考文献45致 谢46附 录47引 言本毕业设计论文为龙湾二次60kv降压变电所电气部分设计，要求所设计的变电所能长期可靠为其负荷供电。设计过程中遵循国家的法律、法规，贯彻执行国家经济建设的方针、政策和基本建设程序，运用系统工程的方法从全局出发，正确处理生产与生活、安全与经济等方面的关系，实行资源的综合利用，节约
