220KV变电站电气主接线系统设计摘要本说明书以220KV地区变电站设计为例，论述了电力系统工程中变电站部分电气设计（一次部分）的全过程。通过对变电站的主接线设计，站用电接线设计，短路电流计算，电气设备动、热稳定校验，主要电气设备型号及参数的确定，运行方式分析，防雷及过电压保护装置的设计，电气总平面及配电装置断面设计和无功补偿方案设计，较为详细地完成了电力系统中变电站设计。限于毕业设计的具体要求和设计时间的限制，本毕业设计只对变电站电气一次部分做了较为详细的理论设计，而对其电气二次部分并没有涉及，这有待于在今后的学习和工作中进行研究。关键词：变电站短路电流动稳定热稳定过电压保护装置无功补偿1220KV变电站电气主接线系统设计ABSTRACTThestatementaboutthe220kvtransformerareasubstationdesign,discussedsomeelectricaltransformerstationsdesign(onepart)inpowersystemsengineeringoftheentireprocess.Throughthemaintransformerstationswiringdesign,stationswiringdesignstations,shortcircuitcurrentcalculations,checkelectricalequipmentmovingandthermalstability,setthemainelectricalequipmentmodelsandtheparameters,theoperatingmode,designover-voltageprotectionandminedevices,designgeneralelectricgraphicanddistributiondevicesflood,andwithoutpowercompensation.Lastly,completedsubstationdesigninpowersystem.Limitedtothespecificdesignrequirementsanddesigntimeofconstraints,Thedesignonlyisapartoftheelectricaltransformerstations,anditssecondpartdidnotinvolve,whichresearchitinfuturestudyandwork.KEYWORDS:Substation,Shortcircuitcurrents,Movingstability，Thermalstability，Over-voltageprotectiondevices，Withoutpowercompensation2220KV变电站电气主接线系统设计目录摘要....................................................................IABSTRACT.................................................................II第1章引言...............................................................1第2章.主接线设计........................................................2·2.1电气主接线的一般要求...............................................2·2.2主接线选择的主要原则...............................................3·2.3主接线方案设计.....................................................3·2.3.1方案拟定及技术比较............................................3·2.3.2方案的经济性比较..............................................5·2.3.4主变的选择.....................................................9·2.3.4.1选择原则................................................9·2.3.4.2容量计算..................................................10本章小结.................................................................11第3章站用电接线及设备用电源接线方案....................................12·3.1所用电源数量及容量...............................................12·3.2所用电源引接方式..................................................12·3.3所用变压器低压侧接线.............................................12·3.4所站用电接线......................................................13·3.5备用电源..........................................................13本章小结.................................................................14第4章短路计算..........................................................15·4.1短路故障产生的原因................................................15·4.2短路故障的危害...................................................16·4.3短路电流计算的目的...............................................16·4.4短路电流计算的内容...........................................
