本科生毕业设计（论文）摘要本毕业设计是对发电厂厂用电进行设计，主要运用发电厂电气部分、高电压技术、电力系统分析、电力系统自动化、电力系统继电保护等专业知识完成“发电厂厂用电的设计”，具体设计内容包括厂用电接线设计、负荷分析计算、变压器选择、电动机自启动校验，继电保护设计、配电装置设计、防雷设计、绘制厂用电接线图、继电保护二次回路接线图、绘制配电装置图。本设计严格遵循发电厂电气部分的设计原则，并结合实际情况确定了厂用电母线电压等级确定为6KV，利用换算系数法进行负荷分析计算，变压器选择低压分裂三绕组变压器，确定了合适的短路点进行短路电流计算。根据防雷保护要求确定避雷器；最后绘制了相关的图纸。关键词：发电厂；变压器；继电保护；避雷器本科生毕业设计（论文）ABSTRACTThetextisdesignedtowardstheelectricitypowerplant,usingelectricalpowerplants,high-voltagetechnology,powersystemanalysis,powersystemautomation,powersystemprotection,andotherexpertisetocomplete,“PowerPlantpowerofdesign”mainly.Specificdesignelementsincludingelectricitycableplantdesign,loadanalysis,thechoiceoftransformers,motorsstartchecking,protectiondesign,distributiondesign,minedesign,drawingelectricityplantwiringdiagram,thesecondcircuitprotectionwiringdiagram,mappingdistributionsetup.Thedesignfollowsstricklytothedesignprinciplesoftheelectricalpowerplants,combinedwiththeactualsituationidentifyingthebusvoltageelectricityplantas6KV,usingconversionfactormethodtocalculatetheload,transformerchoosesthelow-voltagewinding.Fixtheappropriateshort-circuitpointtocalculatetheshort-circuitcurrent.Keyword:powerplant;transformer;relayprotection;arrester本科生毕业设计（论文）目录0前言...........................................................................................................................................11厂用电电压等级确定及接线设计.............................................................................................21.1厂用电的电压等级确定...........................................................................................21.2厂用电接线设计.......................................................................................................22厂用电负荷计算及变压器选择.................................................................................................42.1厂用电负荷的计算原则...........................................................................................42.2厂用负荷的计算方法...............................................................................................62.2.1换算系数法....................................................................................................62.2.2电动机计算功率确定....................................................................................62.3厂用变压器的选择.................................................................................................102.3.1额定电压......................................................................................................102.3.2厂用变压器的容量......................................................................................103电动机的自启动校验...............................................................................................................143.1电动机自启动校验定义.........................................................................................143.2电动机自启动分类.................................................................................................1...
