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内蒙古科技大学本科生毕业设计说明书（毕业论文）题目：2×350MW火力发电厂厂用电设计学生姓名：叶斌学号：0705130113专业：电气工程及其自动化班级：电气07-1班指导教师：李洁(教授)内蒙古科技大学毕业设计说明书（毕业论文）I摘要本文将针对某火力发电厂的设计，主要是对电气方面进行研究。本次设计的电厂在电网占有重要位置，一旦发生事故将引起主网的解裂，所以对电厂主接线形式进行了详细的分析比较，以确定一种安全经济成熟的主接线形式。首先对火力发电的有关内容做以阐述，并对电力主接线中的设备做以描述。依据所给出的原始数据和接线的基本原则进行了主接线形式的设计,选择了低压侧用双母线三分段，而高压侧用双母线的接线形式。简单的介绍了厂用电，对主变压器进行了选择。在三相短路实用计算基本假设的前提下，对三相短路电流进行了计算。根据负荷计算和短路电流计算的结果对断路器等电气设备进行了选择和校验。根据基本原则结合具体要求，绘制完成电气主接线图的一次部分。本毕业设计只对电气主接线一次部分做了较为详细的理论设计。通过对本次的设计设计，掌握了一些基本的设计方法，在设计过程中更加稳固了理论知识。关键词：火力发电电气主接线主要设备内蒙古科技大学毕业设计说明书（毕业论文）IIElectricalDesignfortheprimarysaidofthecoal-firedpowerplant-2*300MWAbstractInthispaper,thedesignofcoal-firedpowerplantsismainlytotheelectricalstudies.Thedesignofthepowerplanttopowergridplayanimportantrole,onceaccidentwillcausethesolutionofthecrack.Sotowiringformofthepowerplantcarrysonthedetailedanalysiscomparison,todetermineasafeandeconomicmatureLordconnectionform.Firstofalltherelevantcontentsofthepowertodothis,andtotheelectricwiringtheequipmenttodoarguedthatdescription.Accordingtotheoriginaldataandthebasicprinciplesofthewiringdesignthewring.Choosethelowvoltagesidewithabus,andthreesegmentationhighpressuresidewithabusofwiringform.Simpleintroducedthestationservice,andchoosethemaintransformer.onthepremiseofthethree-phaseshort-circuitbasicassumptionscarryoutthethree-phaseshort-circuitcurrentcalculation.Accordingtotheresultsofloadcalculationandshort-circuitcurrentcalculation,circuitbreakerelectricalequipmentwerechosenandcalibration.Accordingtothebasicprinciplewithspecificrequirements,paintthemainelectricalwiring.Thegraduationdesignonlyforapartofthemainelectricalwiringgoesondetaileddesignoftheory.Throughthisdesign,havesomebasicdesignmethods,inthedesignprocessandsolidtheoreticalknowledge.Keywords:Thermalpowerelectricalmainwirelightningprotection内蒙古科技大学毕业设计说明书（毕业论文）III目录摘要.......................................................................................................................................IAbstract......................................................................................................................................II目录..........................................................................................................................................III前言............................................................................................................................................1第一章原始资料......................................................................................................................2第二章电气主接线的设计......................................................................................................32.1电气主接线的设计......................................................................................................32.1.1电气主接线的设计原则....................................................................................32.2电气主接线的叙述......................................................................................................32.2.1两种方案的比较................................................................................................62.3主接线的确定..............................................................................................................7第三章厂用电的设计..............................................................................................................83.1厂用电负荷的分类......................................................................................................83.2厂用电的设计..............................................................................................................9第四章短路电流的计算........................................................................................................104.1短路的基本概念........................................................................................................104.1.1故障类型及原因..............................................................................................104.1.2短路的危害及措施..........................................................................................114.1.3短路电流计算的目的......................................................................................124.1.4短路电流计算的基本假设..............................................................................124.2短路电流的计算........................................................................................................134.2.1电气设备标幺值的计算..................................................................................134.2.2各短路点三相短路计算..................................................................................144.3短路容量、全电流最大有效值及冲击电流的计算................................................16第五章电气设备的选择........................................................................................................185.1主变压器型式的确定................................................................................................185.2主变压器容量的确定................................................................................................195.3电气设备选择的一般要求.......................................................................................