I500kV变电站电气部分设计摘要随着近些年来我国经济的高速发展,能源的重要性日趋凸显。电力系统在整个行业中所占的比例逐渐增大,现代电力系统是一个庞大且有领导性地位的整体。各类发电厂、变电站分工完成整个电力系统的发电,变电和配电任务。电力系统是国民经济的重要能源部门,而变电站的设计是电力工业建设中必不可少的一个项目。本毕业设计是500kV(500/220/35)变电站工程电气部分初步设计。其中500kV、220kV侧采用GIS方案,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,从而保证变电站能够长期可靠供电。设计过程中完成了500kV枢纽变电站的电气主接线的选择、主变压器选择、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。本设计书包括原始资料分析、设计说明书、计算书等。关键词:500kV变电站GIS方案电气主接线配电装置变压器IITHEDESIGNOFTHEELECTRICALPARTABOUTTHE500KVTRANSFORMERSUBSTATIONAbstractChina'seconomyinrecentyearswiththecontinueddevelopmentofincreasinglyhighlightedtheimportanceofenergy.Powersystemintheindustryincreasestheproportionofthemodernpowersystemisalargeandtheoverallpositionofleadership.Varioustypesofpowerplants,substationscompletethepowersystemdivisionofpowergeneration,substationanddistributiontasks.Powersystemisanimportantnationalenergysector,andsubstationdesignisessentialfortheconstructionofthepowerindustryasaproject.Thisgraduatedesignthesisisa(500/220/35)kVadecliningtopresstochangetogiveorgetanelectricshockanelectricitypartsoffirststepsdesign.Forthesakeofdependablethatguaranteethepowersupplywitharequestthatcontentedlong-termburthen,carriesaccordingtotheforwardtheprogrammingproceedingdesigndevelopments,frombutguaranteetochangetogiveorgetanelectricshockcanlong-termdependablepowersupply.Thedesignprocesstocompletetheregional500kVelectricalsubstationdesignapartofthecontentanddesign,themainliningselection,thedevelopmentofmainpower,shortcircuitcalculations,electricalequipmentselection,powerdistributionequipmentplanning,relayprotectionandautomaticprotectiondevicesandmineplanningforplanningmajorwork.Thedesignofthebookincludingthedesigningspecification,calculatingandselectingbookandthedrawings.Keywords:500kVsubstationGISschemeMainelectricalconnectionPowerdistributionequipmentTransformer目录中文摘要.......................................................................................I英文摘要.....................................................................................II1绪论..................................................................................11.1引言................................................................................11.2变电站原始资料分析........................................................12变电站各电压等级电气主接线选择...................................32.1概述................................................................................32.2主接线的设计原则及基本要求........................................32.3电气主接线的选择............................................................63主变压器的选择.................................................................123.1主变压器选择的有关规定及原则..................................123.2本设计主变压器的选择..................................................134短路计算..............................................................................144.1短路电流计算..................................................................144.2短路电流和短路容量......................................................144.3短路电流所引起的后果..................................................144.4限制短路电流的措施......................................................154.5计算结果..........................................................................155电气设备和导体的选择.....................................................165.1电气设备选择的一般要求..............................................165.2断路器的选择..................................................................195.3隔离开关的选择..............................................................215.4互感器选择......................................................................235.5电抗器的选择..................................................................285.6电容器的选择..................................................................295.7导体的选择......................................................................305.8避雷器的选择..................................................................315.9配电装置及电气平面布置..............................................326设计计算书..........................................................................346.1短路电流计算..................................................................346.2断路器选择......................................................................387总结..................................................................................40参考文献....................................................................................41致谢........................................................................................42附录1外文参考文献(原文)............................................43附录2外文参考文献(译文)............................................5011绪论1.1引言我国是世界能源消耗大国,煤炭消费总量居世界第一位,电力消费总量居世界第二位,但一次能源分布和生产力发展水平却很不均匀。水能、煤炭主要分布在西部和北部,能源和电力需求主要集中在东部和中部经济发达地区。这种能源分布与消费的不平衡状况,决定了我国的能源配置上必须以大煤电基地、大水电基地为依托。实现煤电就地转换和水电大规模开发。而变电站担负着从电力系统受电,经过变压,然后分配电能的任务,是输送和分配电能的中转站,是供电系统的枢纽,在全国电网中占有特殊重要的位置。近年来,电力在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。变电站的合理设计与建设是一个极其重要的组成部分。针对自己的专业相关性选择了本毕业设计课题:500kV变电站工程电气部分设计,为自己以后的工作打下一定的专业基础,让自己以后能尽快地适应工作,融入工作环境中,更加得心应手的工作,,为以后的工作打下必需的基础。鉴于所学的专业知识有限,只是对变电站电气部分进行初步的设计,初步设计将宏观勾画出工程概貌,控制工程投资,初步设计是工程设计中的主要阶段。设计应基本达到实际工程设计的要求,具有