110kV降压变电所电气一次系统设计

辽宁科技大学第I页110kV降压变电所电气一次系统设计摘要经济的迅速发展，科学技术的不断进步促使社会中各行各业都在不断地发展壮大，各大高校相继出现了前所未有的发展势头，特别是各种高、新、尖、精的技术应用，而所有的一切都离不开电，而电的中枢—变电所更是必不可少，起到至关重要的作用。目前，我国城市电力网和农村电力网正进行大规模的改造，与此相应，城乡变电所也正不断的更新换代。我国电力网的现实情况是常规变电所依然存在，小型变电所，微机监，测变电所，综合自动化变电所相继出现，并得到迅速的发展。然而，所有的变化发展都是根据变电设计的基本原理而来，因此对于变电设计基本原理的掌握是创新的根本。本毕业设计的内容为ll0kV终端变电所电气一次系统设计，正是最为常见的常规变电所，并根据变电所设计的基本原理设计，务求掌握常规变电所的电气一次系统的原理及设计程。关键词：变电所设计；电气主接线；继电保护辽宁科技大学第II页110kvstep-downsubstationelectricalsystemdesignatatimeAbstractTherapiddevelopmentofeconomy,scienceandtechnologyprogressofsocietyinallwalksoflifearecontinuouslydeveloping,majorcollegesanduniversitieshavebeenhithertounknowndevelopmenttendency,especiallytheapplicationofhightechnology,new,sharp,fine,andallcannotdowithoutelectricity,andelectriccentersubstationitisessential,playacrucialrolein.Atpresent,ourcountrycitypowernetworkandtheruralpowernetworkisalarge-scalerenovation,accordingly,urbanandruralsubstationisalsoconstantlyupgrading.TherealityofpowernetworkinChinaisstillexistsconventionalsubstation,smallsubstation,microcomputermonitoring,measurementofsubstation,comprehensiveautomationsubstationappearinsuccession,andhasrapiddevelopment.However,developmentofallisaccordingtothebasicprincipleofthebasicprinciple,thedesignofelectriccontrolisinnovation.Thisgraduationdesigncontentforthell0kVterminalsubstationelectricaldesignofasystem,itisthemostcommonconventionalsubstation,accordingtothebasicprincipleofthedesignofsubstationdesign,tomastertheprincipleandthedesignprocessofconventionalsubstationelectricprimarysystem.Keywords:substationdesign;Themainelectricalwiring;Relayprotection辽宁科技大学第III页目录摘要..........................................................................................................................IAbstract.....................................................................................................................II第1章概述..........................................................................................................11.1毕业设计目的...................................................................................................11.2毕业设计内容............................................................................................11.3发展趋势....................................................................................................1第2章主变压器选择............................................................................................32.1变压器的设计原则....................................................................................32.1.1主变压器台数的确定原则.............................................................32.1.2主变压器形式的选择原则.............................................................32.2主变压器的计算与选择............................................................................42.2.1主变压器容量的确定.....................................................................42.2.2主变压器形式的选择原则.............................................................5第3章负荷计算....................................................................................................63.1负荷概述....................................................................................................63.2负荷计算....................................................................................................6第4章电气主接线设计.....................................................................................114.1电气主接线设计概述..............................................................................11一、对电气主接线的基本要求...........................................................11二、变电站电气主接线的设计原则..................................................12三、电气主接线设计步骤..................................................................13第5章短路计算与保护......................................................................................185.1短路..................................................................................................................185.2继电保护的基本知识......................................................................................22一、110kv线路的继电保护配置及整定计算...................................221110kV线路继电保护配置.................................................................222110kV线路继电保护整定计算.........................................................23二、变压器的继电保护及整定计算..........................................................281、变压器的继电保护..........................................................................282、变压器的继电保护整定计算........................................................293、母线保护........................................................................................32辽宁科技大学第IV页5.3防雷保护设计.................................................................................................34参考文献................................................................................................................41致谢......................................................................................................................42附录A....................................................................................................................43变压器继电保护图A1............................