110KV降压变电所继电保护设计

I摘要本次设计根据相关资料及参考书籍，作出了110KV降压变电所继电保护设计。本设计说明书内容大致共分为五章，包括设计资料分析、参数计算、保护装置选择、各保护的整定计算、微机保护等。本设计以实际负荷为依据，变电所的最佳运行为基础，按照有关规定，完成了满足要求的110KV降压变电所继电保护设计。变电所担负着从电力系统受电，经过变压，然后配电的任务。它也是电力系统中对电能的电压和电流进行变换、集中和分配的场所。为保证电能的质量以及设备的安全，在变电所中还需进行电压调整、潮流控制以及输配电线路和主要电工设备的保护。继电保护的发展是伴随电力系统、电子技术、计算机技术、通信技术的发展而发展。从它的构成原理方面来看，一直是随着电力系统发展而不断提出相应的新原理保护，新原理保护又在电力系统运行中不断完善，不断趋向成熟。目前微机保护已经普遍应用，它与以往的各种类型的继电保护相比，是采用数字计算技术实现的各种保护功能。它具有灵活性大、可靠性高、易于获得附加功能和维护调试方便等优点，因此必将越来越多的应用，有着很好的发展前途。[关键词]110KV变电所继电保护微机保护IIAbstractThisdesignaccordingtotherelevantmaterialsandreferencebooks,madea110kvstep-downsubstationrelayprotectiondesign.Thisdesigncontentisdividedintofivechapters,includingthedesignofdataanalysis,parametercalculationandprotectivedeviceselection,theprotectionsettingcalculationandmicrocomputerprotection,etc.Thisdesignwasbasedontheactualload,basedontheoptimaloperationofsubstation,shall,inaccordancewiththerelevantregulationsandspecification,andfinishedthemeettherequirementsof110kvstep-downsubstationrelayprotectiondesign.Substationforthepassbytheelectricpowersystem,transformer,thenthedistributionoftasks.Itisalsointhepowersystemvoltageandcurrentofelectricalenergytransformation,concentrationanddistributionofplaces.Inordertoensurethesafetyofelectricenergyqualityandequipmentinthesubstationandvoltageregulation,currentcontrolandpowertransmissionanddistributionlinesandtheprotectionofthemainelectricalequipment.Thedevelopmentofrelayprotectionisalongwiththeelectricpowersystem,thedevelopmentofelectronictechnology,computertechnology,communicationtechnologyanddevelopment.Initsconstitutionprincipleways,hasbeenwiththedevelopmentofpowersystemprotectionandcontinuouslyputforwardnewprinciples,newprinciplesandprotectioninpowersystemintheoperationoftheconstantlyimprove,constantlytomature.Microcomputerprotectionhasbeenwidelyusedatpresent,itiscomparedwiththepreviousallkindsofrelayprotection,istousedigitalcomputingtechnologytoachievevariousprotectionfunctions.Ithasgreatflexibility,highreliability,easytogetadditionalfeaturesandmaintenanceconvenientdebugging,sowillbemoreandmoreapplications,hasaverygooddevelopmentfuture.[Keywords]110KVSubstationrelayprotectionmicrocomputerprotectionIII目录摘要.......................................................................................................................................................................IAbstract..............................................................................................................................................................II目录....................................................................................................................................................................III1引言..................................................................................................................................................................12设计分析..........................................................................................................................................................22.1设计原始资料......................................................................................................................................22.2继电保护简介......................................................................................................................................22.2.1继电保护任务..........................................................................................................................22.2.2继电保护装置的组成..............................................................................................................23参数计算..........................................................................................................................................................43..1系统中短路电流计算........................................................................................................................44保护装置选择..................................................................................................................................................65各保护的整定计算..........................................................................................................................................75.1纵差保护的整定计算...........................................................................................................................75.2110KV侧复合电压起动的过流保护的整定计算...............................................................................95.338.5KV侧方向电流保护...................................................................................................................105.4110KV侧零序过电流保护..................................................................................................................115.5变压器瓦斯保护的整定.....................................................................................................................115.6变压器保护接线全图.........................................................................................................................116微机保护.................................................................................