35-220kv变电站设计外文翻译　

'本科毕业设计（论文）中英文对照翻译院（系部）信息专业名称电气工程及其自动化学生姓名李翰成generallylargercapacityfiltercapacitance,thetransientovervoltageshockabsorptionofacertainextent,thestationLow-voltagetransformersidegotofeedbetweenthescreenusingashieldedcableandequipmenthaveagoodgrounding,theuseofmoderntechnologytoanalyzemine,wemustincreasethecircuit’ssegregationmeasures,becauseitsgrounding,protectionandotherelectricalgroundingallGroundingdevicesusingthesameequipment,andequipmentareinaLPZOB,therelativestrengthofstrongelectromagneticpuIse,thestationchangedtopreventlow-pressuresidealthoughtherearelinesintrusivewavearrester,buttheresidualpressurehigh,inthesubstationoflightning,throughthelineCouplingandthepotentialrisecausedbyover-voltagecounterattackstillexist,andhigh-pressuresideoftheresidualpressureashighasseveralthousandvolts,itisnecessarytotheseschedulingautomationequipmentforthepowersupplyover-voltagecircuitprotection.LightningProtectioninaccordaneewiththeprincipleofregionaldivision,substationequipmentinthesecondarypowersupplysystemover-voltagesensorslightningprotectionmaybetwo(B,Clevel)fortheprotectionofsegregation.B-mineuseisgenerallygreaterflowcapacityofthemineinstallations,theLightningcouldbemorecasualLiuxiepeople,toachieve theobjectiveofcurrentlimit,over-voltageatthesametimewillreducetoacertainextent,c-mineuseWithlowerresidualpressureofthemineinstallations,youcanloopintheremainingscatteredlightningLiuxiepeople,tolimitthepurposeofover-voltage,over-voltageequipmentcanbereducedtotheleveloftolerance.Themainpowersupplysystemisinhibitedlightningprotectionandoperationofthepowerbacktotheroadandover-voltagesurge.Accordingtothesubstationstatusofthesubstationofthesecondmine-sensingsystemandtheoperationanduseoftwoover-voltageprotection.Asbuildmoresubstationsjntheregionmoreopen,relativelystrongelectromagneticstrength,powerlinesandcommunicationcablesareveryvulnerabletolightningattackssensors,sensorsalongtheover-voItagepowerlinesandcommunicationlinesintoonedevice,whichwilldamageequipment,Therefore,theexchangeoffirst-classbustoinstalIthepowerprotection(Blevel)istoensurethesafetyoftheentirecontrolroom,and80percentoftheover-voltageChina,scatteredtotheearth,playaprimaryroleintheprotection,butarestillintheexchangeoffeederSomeoftheB-levelpowersupplyvoltageandminetheresidualpressureincreaseson-lineandmusttheretorebeimportantintheexchangeoffeederlines(DCchargingscreen,UPS,etc.)c-levelpowerprotection,whichwouldcurbover-voltageelectricalequipmenttoback-endTotheleveIoftolerance.Protectivelocation:Itis1ECI312(LEMPprotection"intheregionoflightningprotectionprinciples.Arresterinstallationshouldbeindifferentlocationsatthejunctionofprotectedareas,thisnetwork,thefirst-classprotectionshouldbeIocatedinthebusexchange.InTwoonthebuswiththeinstallationofaB-classmodeIsofathree-phasepowersupplyvoltagesurgeprotector.InstallLocation:ACbus(cabinet).3.2second-classprotectionmeasurestodealwithchargescreen,theinstallationofc-levelthree-phasepowerarrester.AsDCchargingsereenistwo-wayexchangeofelectricitysupply,sothescreenintheDCchargewiththeinstallationoftwomodelsofc-levelthree-phasepowersupplyover-voItagesurgeprotector.IinstallationlocationshouldchoosetheDCchargescreenopenexchangeofairpower.3.3integratedautomationsystemover-voltageprotectionProtectiveposition:Computer-basedintegratedautomationsystem’sabilitytobearaverylowvoltage,severalhundredvoltsofover-voltageisenoughto damagetheequipment,somustthehighsidearrestertheresidualpressure(thousandsofvolts)tofurthercurbtomeetequipmentInsulationlevelofneed,andbecauseofthepotentialrisetopowerandtheinductionloopisalsoover-voltagelineuponKV,tobeusedintheexchangeofintegratedautomationsystemtotheexchangeonthec-levelsingle-phaseinstallationofasurgeVoltageprotection.Locationshouldchoosetoinstallautomated-pingintheCompositeAirswitchtheACpower.3.2didnotaskoffpowersupplies(UPS)over-voltageprotectionpplyprotect,theUPSpoection.OptiProtectionhere:becauseoftheinternalcomputersystems,hubs,monitoringequipment,electricenergybillingsystemsandsoonthroughtheUPSpowersuion,inordertoprotectthesafetyofthesemicro-electronicsequipmentwersupplydeviceinfrontoftheinstallationofac-SurgeVoltageprotonalmodels:The(UPSforsingle-phasepowerinput)C-classsinglephasepowersurgeorover-voltageprotection(UPSforthethree-phasepowerinput)ofc-levelthree-phasepowersupplyover-voltagesurgeprotector.InstallationshouldchoosethelocationofUPSintothefrontline.3.5communicationjnterfaceover-voltageprotectionCommunicationInterfaceover-voltageprotectioncomparedwiththegridsupplysystem,thisover-voltagecircuitonthedegreeofsensitivityismuchhigher,andtheseareovervoltageequipmentinthecircumstancesitisveryfragile.Equipmentinsulationtolerancelevelisverylow.Withtheequipmentconnectedtoasignalline,datalines,measurementandcontrollines,andthesearebasicallyinlineLPZOBregion,butalsothroughtheLVZOAregion,ontheIinesofsensorsover-voltagerelativelystrong,accordingtotheIECtestzwhentheelectromagneticfieldStrengthincreasedto0.07GS,willhaveamicro-computerequipmentmalfunction,lossofdata.Andthesafetyofthesecircuitsisdirectlyrelatedtoasystemofsafetyequipment,soimportanttobeontheinterfacecircuitover-voltageprotection.3.5.1remotecomputerinterfacedevicesover-voltageprotectionProtectiveposition:AssubstationcomputerremoteinstaNationsseattereddistributionstructure.Fromremotemodules,intelligenttelemetrymodule,intelligentremotecontrolmodule,intelligentremote-module.Themodulesareinstailedindifferentautomated-ping,throughtheRS232interfacebetweenthemodulesorfieldbuscommunication.Theseinterfacesareintheindoorcircuit,equipmentinterfacecircuitsshorterthedistance,sotherewillbenomoresensorstotheover-voltage,buttheautomationequipmentandothersecondaryequipment(measurementunit,computer,etc.)haveelectricalconnections,whenOthersecondaryequipmentsensorstoastrongover-voltagesensors,willbecountertotheseautomationequipment,communicationsinterface,sothatdamagetoequipmentinterfacecircuits,itisnecessaryinthesedevicesRS232interfacesontheinstallationofasurgeVoItageprotection.Installationlocationshouldchoosetheremotecomputerinterfacedevices,communicationslines.3.5.2electricenergybillingsystemsignalsover-voltageprotectionAprotectiveposition:amulti-functionaIelectronicpowersubstationtable,energyacquisition,theelectronicpowermetertobearaverylowvoltagelevels.AsMeterandremotecomputerstationsinthecommunicationsequipmentusedRS232interfaces,thecommunicationlineisIonger,andinLVZOBregion,nearthesubstationorbydirectlightningstrikeatthesubstation,proximitytothehighvoItagesensors,Inordertopreventdamagetoequipment.E-MeterinandaroundtheRS232portRS232installationoftheover-voltagesurgeprotector.LocationshouldchoosetoinstaIIelectron!c powermeterinandaroundtheport,RS232.Thelocationofprotection:electronicpowermeterthroughtheacquisitionofinformationonthecollector"sMODEM(modem)fromtelephonelinestosenddatatoaremote,sincetheintroductionoftelephonelinesfromtheoutside,thelinesonthesensortosensorlightningcurrentrelativelystrong,easytoModeminterfaceequipmentdamage,itisnecessaryinthetelephonelinemodeminterface,theinstallationofaninterfaceover-voltagesurgeprotector.LocationshouldchoosetoinstalltelephoneChuxianinsideandoutsidephonelines-the-linepeople.3.5.3distancecommunicationinterfaceover-voltageprotectionProtectiveposition:Sincethebasicuseofunmannedsubstation.Onthefirstcircuitprotection,measurement,controI,regulationofsignalthroughtheopticalanddatacommunicationsnetworkorcarriertothedistance(intune,andstressedthatthecentralizedcontrolstations,etc.)totransmitdata.Ifthecarrier,thecarrierandthecomputerautomationofthesignaldevicesconnectedrelativelylonglines,substationsinthevicinityofadirectlightningstrikeorsubstations.Shouldbeastrongover-voltagesensors,tobenearthecomputerautomationdevicestosignalI:卜theinstaNationofsignalarrester,whileintheareaandextendtoLPZOBLPZOAareaofcommunicationlines(DDN,X.25)veryeasyLightningsensorsontheover-voltage,mustalsobetheinstallationofover-voltagesurgeprotector.InstallationlocationshouldchoosetheremotedevicecommunicationlineinterfaceDepartment.systernover-voltagesubstationprotectionissuesinrecentyearsbyanewtask,theaboveisonlyrelatedtothesceneoftheunitintotheactualsituationontheProtectionofthepreliminarymeasures,itwillbeincontinuingtodrawonpracticalexperienceofrunningasummaryanalysisandcontinuousimprovement,Hopethatthenewsubstationinthefutureortheoldsubstationautomationofintegrated,strengthenthesecondaryover-voltageprotectionsystemofpianninganddesign,equipmeritandensurethesafeandstableoperationofpowergrids. 3.1.2第二级防护处理措施对于较为重要的交流馈线上的设备，此处为直流充电屏，加装c级三相电源避雷器。由于直流充电屏是两路交流供电，所以在直流充电屏处加装两个同型号的c级三相电源浪涌过电压保护器。安装位置宜选择在直流充电屏交流电源空气开关处。3.2综合自动化系统过电压防护防护位置：微机型综合自动化系统承受过电压的能力极低，儿百伏的过电压就足以将设备损坏，因此必须对高压侧避雷器的残压（儿千伏）进行进一步的抑制，以满足设备绝缘水平的需要，同吋由于地电位升高而感应到电源回路零线的过电压也高达上千伏，因此必须在采川交流综合自动化系统的交流回路上加装c级单相浪涌过电压保护器。安装位置宜选择在综合自动化屏交流电源空气开关处。3.3不间断电源设备（UPS＞过电压防护防护位罝：由于A部计算机系统、集线器、监控设备、电能量计费系统等均经由UPS供电保护，为了保障以上微电子设备的安全，故在UPS电源装置前端加装c级浪涌过电压保护器。选川型号：选用（UPS为单相电源输入时）C级单相电源浪涌过电压保护器或（UPS为三相电源输入时）的c级三相电源浪涌过电压保护器。安装位置宜选择在UPS电源进线前端。3.4通信接口过电压防护通信接口过电压防护同电网供电系统相比，此回路对过电压的敏感程度要高得多，且这些没备在有过电压的情况下显得非常脆弱。设备的绝缘耐受水平也相当低。与这些设备相连的有信号线、数据线、测量和控制线路，并且这些线路基本上是处于LPZOB区域，也有穿过LVZOA区域的，线路上的感应过电压相对较强，根据IEC的测试，当电磁场强度增大到0.07GS吋，微型计算机设备将产生误动，丢失数据。而且这些M路运行的安全与否直接关系到一次系统设备的安全，因此须对重要回路的接口进行过电压防护。3.4.1微机远动设备接口过电压防护防护位置：巾于变电站微机远动装置采用分布分散式结构。巾遥信模块、智能遥测模块、智能遥控模块、智能遥调模块组成。各单元模块都装设在不同的向动化屏内，模块之间通过RS232接口或现场总线进行通信。这些接口线路都处在室内，设备接口线路的距离较短,因此不会感应到较强的过电压，但是各自动化设备与其它二次设备（测量单元、计算机等）有电气连接，当其它二次设备感应到很强的感应过电压时，将会反击到这些自动化设备的通信接口上，从而使没备接口电路损坏，因此有必要在这些没备的接口上加装RS232的浪涌过电压保护器。安装位置宜选择在微机远动装置通信线路接口处。3.4.2电能量计费系统信号过电压保护防护位置一：变电站采用多功能电子电能表进行电能量采集，电子电能表承受过电压的水平极低。由于电能表与站内微机远动设备的通信采川RS232的接U,其通信线路较长，又处在LVZOB区域，在变电站附近或变电站遭受直接雷击时，将感应出较强的感应过电压, 为了防止设备的损坏。在靠近电子电能表的RS232端口加装RS232的浪涌过电压保护器。安装位罝宜选择在靠近电子电能表的RS232端口处。防护位置二：电子电能表采集的信息通过集中采集器的MODEM（调制解调器）由电话线将数据传送到远端，由于电话线路从室外引入，线路上感应到的感应雷电流相对较强，容易将调制解调器没备的接口损坏，因此必须在调制解调器的电话线路接口处加装一个接口浪涌过电压保护器。安装位置宜选择在内线电话出线端和外线电话的人线端。3.4.3远方通信接口过电压保护防护位置：由于变电站基本采用无人值守。对一次回路的各种保护、测量、控制、调节信号通过光纤、数据通信网络或载波向远方（省调、地调、集控站等）传送数据。如果采用载波，由于裁波机与微机自动化装置的信号连接线路相对较长，在变电站附近或变电站遭受直接雷击吋，处在LPZOB区的通信线路将感应岀较强的感应过电压，因此必须在靠近微机自动化装置的信号接hI端加装信号避雷器，同时处在LPZOB区并延伸到LPZOA区的通信线路(DDN、X.25)非常各易感应上雷电过电压，也必须加装浪涌过电压保护器。安装位置宜选择在远动装置通信线路接口处。变电站系统过电压防护问题是近年来提出的一个新课题，以上仅是结合本单位相关现场实际情况对防护技术措施的初步探讨，还需在不断吸取实际运行经验进行总结分析和不断完善，希望在今后新建变电站或者对老旧变电站进行综合自动化改造时，加强对过电压防护系统的同时规划和没计，确保设备和电网的安全稳定运行。'