变电站蓄电池在线监测系统的设计与实现

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1、西南交通大学硕士研究生学位论文第l

2、I页AbstractVRLAbatteryisoftenusedasback—uppowerinthepowersupplysystem．ItisaDCpowersupplyandwhenthemainpowersupplysystemfails，thesecondarypowersystemmaintainsitsnormaloperatingsystempoweredbybatteries．ThereforethestabilityofVRLAbatteryandthea

3、ctualcapacity,providingfortheloadinthedischargeprocess，hasahighlysignificanceinmakingsurethatelectricalequipmentworkregularly．Inmostcases，batterymanagementdetectthecapacityofbaReriesbyadischargetest，orbyreplacingbatteriesperiodicallyinsubstation，inordertopro

4、tectelectricequipmentfromappearingfaultsduetolackingofcapacity．Butadischargetestwillspendmuchtimeandreplacingbatteriesresultsawasteofbatteriesandeconomiclosses．Tosolvetheseproblems，thepaperdesignsandcompletesareal-timeonlinesystemtomonitorthestatusofbatterie

5、s．Thesystemconsistsofdataacquisitionunit，SBUSconversionunit，theprimarycontrollerunitandmonitoringhostunit，withusingsensortechnology,computertechnologyandmodemcommunicationtechnologycomprehensively．Batterysensorsandcurrentsensorsareusedtodetectbatteriesoperat

6、ingparametersreal-timebybatteryacquisitionunit．TheSBUSserialbuscommunicationprotocolhasbeenusedinbatterysensors，andthesensorsconnectedtogetherviacommunicationlineswithSBUSconverters．Thereliableofdatatransmissionwillbeensured、析mtheredundancyofSBUSeffectively．

7、ThesystemusesaSBUSconversionunit，whichCanchangethebatteryparametersignaltotheserialdatastream，whichCanbereceiveddirectlybytheprimarycontroller．Theprimarycontrollerunitreceivesthebatteryparametersandprocessesthem，thendisplaythenontheLCDdisplay．Meantime，thepri

8、marycontrollertransmitsbatteryparameterstothemonitoringhostthroughGPRSwirelesscommunication，andthecontrollercomparesbatteryparameterswiththepre-setbatteryparameterthresholds．Ifithasbeendetectedthatthedetectingbatteryparametersexceedthepre-setbatteryparameter

9、thresholds，thecontrollerwilldrivethebuzzertogiveawarning．Monitoringhostreceivesbatterydata,uploadingfromthecontroller,storesdataanddisplaystheworkingstatusofthebattery．Throughanalgorithm，thesyst