基于zigbee的输电线路在线监测英文翻译.docx
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基于zigbee的输电线路在线监测英文翻译.docx
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基于zigbee的输电线路在线监测英文翻译
基于zigbee的输电线路在线监测-英文翻译
StudyonMonitoringSystemofOn-LinePowerTransmissionLinesBasedonZigBeeTechnology*
ZHONGYun-ping1,CHENGXiao-hua1,DAIDong1,ZHANGJian-wei2,ZHAIShao-lei2
(1.SouthChinaUniversityofTechnology,Guangzhou510640,China.
2.ElectricPowerResearchInstituteofYunnanElectricPowerTest&Research
InstituteGroupCorporationLimited,Kunming650217,China)
ReceivedJuly2012;acceptedNovember2012
Abstract:
CombiningtheneedofmonitoringhighvoltageinpowersystemwiththetechnicaladvantagesofZigBee,thispaperproposesasetofhigh-voltagewirelessmonitoringsystemwiththecharacteristicsofZigBeewirelesssensornetworks,thebasicprinciplesanditscomposition,anditpresentstheuseoftheemergingZigBeewirelessnetworkingtechnologyintheon-linemonitoringsystem.ZigBeecommunicationmodule,theinducingpowerdesignonhigh-voltagetransmissionlines,solarmoduledesign,andthestructuredesignofsoftwaresystemarealsodescribedindetail.Thesystemhasadvantagesofhighreliability,simplearrangement,goodexpandability,lowrunningcost.Thelaboratorytestresultsarestableandreliable.
Keywords:
ZigBeetechnology,wirelesscommunicationtechnology,transmissionlinemonitoring,CC2530,wirelesssensornetwork
1.Introduction
Inrecentyears,withthedevelopmentofsocialeconomy,thenationalpowerconsumptionhasskyrocketed,ultra-highvoltagepowergridconstructionandscaleexpandsrapidly.Becauseofthehighvoltagetransmissionlinehasalongdistance,widedistribution,patrolandmaintenancedifficultyetc[1].Inremoteareas,theterraincomplexworkinharshenvironmentnetworkoftransmissionlinesoftransmissionlineanditsenvironment,meteorologicalparameters,thereal-timeremotemonitoringbecomeanurgentwork,basedonthetransmissionlinerunningstatusreal-timemonitoring,establishcorrespondingnaturaldisasterwarningmechanism,canreducethepoweroutagecausedeconomiclosses,improvethestabilityofthesafetyofpowergridoperationefficiency[2].Therefore,toestablishthestableoperationofthetransmissionlineon-linemonitoringsystemforpowergridplaysanimportantrole,andtheestablishmentofatransmissionlineon-linemonitoringsystemisanimportantpartofthesmartgrid[3].
Traditionalmonitoringnetworkisgivenprioritytowithcable,wiringcomplexity,lowreliability,safety,highcost,lowextensionandmaintenancedifficultiesandotherissues.Thecommonwirelesscommunicationtechnology,suchasGPRS,Wi-Fi,thatexistsuchproblemsashighcost,largepowerconsumption.DesignedakindofwirelesssensornetworkbasedonZigBeetechnology,ithaslowpowerconsumption,lowcost,safe,reliableandnetworkadvantagesoflargecapacityandhighefficiencyofthecollection.Atthesametimebecauseofit’snowiring,easyextension,highflexibility,etc.ithasbeenappliedgraduallyinthetransmissionlinemonitoringsystem[4].Transmissiondistanceofeachnetworknodecanfromthestandard80meters,afteraddpoweramplifiercanbeextendedtoafewhundredmeters,evenseveralkilometers;InadditiontheZigBeenetworkcanalsocommunicatewithotherexistingcommunicationnetwork..
Consideringthehighvoltagetransmissionlinemonitoringequipmentworkingenvironmentandconditions,thispaperdesignsawirelesstransmissionlineon-linemonitoringsystembasedonZigBeetechnology,combininginductionwaytofundamentallysolvetheproblemofthehighvoltageinsulation,hasalargecapacityofthenetworkatthesametime,smallvolume,lightweight,lowpowerconsumption,andtheadvantagesofconvenientinstallation,isanideal
nodesofthesensordataacquisitionandcommunicationmodule)andthecoordinatormodule,asshowninfigure2.
Fig.2Blockdiagramofmonitoringdevice
Wirelesssensornodesusuallyconsistoffourmainmodules:
sensor(signaladjusting,transmitter),aprocessormodule(microprocessors,memory),awirelesstransceivermodule,wirelessnetwork,MAC,transceiver)andapowersupplymodule,powersupply,AC-DC).Sensormoduleanddataacquisitionnode(CC2530)communicationusingRS-485,whensendsensorsreaddataacquisitionnodecommand,ifthesensorreceivedreplyreaddatacommand,thecorrespondingdataasaresponse,readsensorserialdataacquisitionnode,andtheserialportreadpacketspackagecheckgeneratesamessage,sendpacketsprocessedtask,thefinaldatatothefrequencyof2.4GHzissenttothecoordinator(orrouternodes).
Coordinatormoduleandterminalnodemoduleisdifferentisthecoordinatorwiththewirelesssensorintheformofwirelessdatacommunication,andeachterminalnodereceivesdataviaaserialportRS-232transmissiontotheARM9datacollectionplatform.
3.2Thepowersupplydesign
Atpresent,theelectronicdevicesathighpressuresidecantakewaymainlyincludesolarbatteryandbatterylaserpowerandelectroniccurrentinductioncan(i.e.,inductioncan).Consideringthehighvoltagepowerelectronicdeviceonthetransmissionlinemaintenanceandworkingenvironment,etcfactors,unfavorableusebatteryandsolarbatterypowersupply.Asaresult,thedesignofthepowersystemisdividedintotwokindsofsituations:
thefirstkindofcircumstance,hasgreateradvantagesformonitoringequipmentonthetransmissionline,adoptinductionwaytosensorandZigBeemodulepowersupply.SensormodulevoltagegradeforDC12V,ZigBeemodulepowersupplyvoltageisDC2.5~3.6V,sotheinductioncanshouldhavetwodifferentway,andtheoutputvoltage;Thesecondcase,thetowerforthemonitoringequipmentincludesmonitoringhost,useofsolarbatterypowersupply.
Accordingtothelawofelectromagneticinduction,Whenalternatingcurrentflowsthroughthesetofhighvoltagesideoftheringcorebus(theequivalentofawinding),ontheannularcorecoil(secondarywinding)inductionofinductionelectromotiveforce,calledhighvoltageinduction.Voltageinductionpowersupplyguaranteeforhighvoltagesideofelectronicequipmentandreliablepoweratthesametime,andcanensurethereliabilityoftheinsulation.Thechangeofthehighvoltagesidebuscurrentsituationisverycomplicated,whenresourcesusedcurrentminimummaybeonlyAfewA,andwhenhappentransmissionlinefaulttransientcurrentmayreachtensofkA[6].
Consideringthechangeofthetransmissionlinecurrentunpredictability,electronicdevicefortransmissionlinepowersupplyincreasedthecompensationloop,twowithdifferentmagneticringcorematerial,whichcantakecoreusingtheinitialpermeabilitysignificantlyhigherthantheinitialcompensationcorepermeabilityofsoftmagneticmaterials,andcantakereverseserieswindingandcompensationwindingconnection[7],asshowninfigure3.
Fig.3Deviceofinducingpower
Inductionpowersupplycanbytakingquad,compensatingwinding,impactprotectionunit,thewholebridgerectifier,regulator,filterunitdropofsubsectionpressureunits.Whenthehighvoltagebusbarthroughtheelectriccurrentissmall,duetolargeinitialmagneticpermeabilityofthecompensationwinding,thecompensationwindinginducedvoltageisnegligible,undertheconditionofhighcurrentcancompensationwindinginductionelectromotiveforceandwindinginductionelectromotiveforcepartiallyoffseteachother,toreducetheheatloss,sothatcantakethepowersupplyinthehighvoltagebusarelativelywiderangechangecanworknormally.Whenimpactcurrentistoolarge,duetothelimitedcompensationwinding,toprotectcantakepowerfromdamageunderimpulsecurrent,betweenthewholebridgerectifierandinductionwindingtojoinimpactprotectionunit.Whencurrentflowsthroughtoomuchimpactonabus,impactprotectionunit,thewindingcurrentflowonlyimpactprotectionunitandtheprotectionofthewholebridgerectifiercircuitlevelandafter,duringnormalworkingconditionimpactprotectionunitdoesnotwork.Byvoltagefilteringunitofafterfullbridgerectifiervoltageripplevoltageregulatorandfilteroutnoise,makeitshavethepulsatingmultiplexedoutputdcsmall,littleharmonic,safeandstableoperationtoensureelectronicdevices[8].
Fortoweronelectronicdeviceadoptsolarbatterypowersupplymode,selectstheconversionefficiencyofmonocrystallinesiliconsolarpanels,thestandardforthepowertochoose:
firsttocalculatetheconsumptionofhoursaday,whentheoutputpowerfor
(W),ifeverydayuse
(h),thepowerconsumptionfor
(Wh).Calculatethesolarpanels:
accordingtothedailysunshinetimeisThour’scalculationeffectively,andthelossintheprocessofconsideringthechargingefficiencyandcharging,theoutputpowerofsolarpanelsshouldbe
(W).Where
isthechargingprocess,theactualuseofpowerofsolarpanels?
Batterywithsmallvolume,longlife,goodenvironmentalcompatibility,hightemperatureresistant,suitableforfastcharging,highsafetycoefficientoflithiumironphosphatebatteries,batterycapacitycalculationformula:
(Ah)
Type
isthesafetyfactor;
fordailyaveragepowerconsumption,astheworkingcurrentmultipliedbythefirstdayworkinghours;
forthelongestcontinuousrainydays;The
fortemperaturecorrectioncoefficient;Cforbatterydischargedepth.
4.Thedesignofsystemsoftware
Systemsoftwaredesignisdividedintothecoordinatorroutingnodesoftwaredesign,softwaredesignandsoftwaredesignofwirelesssensornodes[9,10][10][10],inadditiontothethreerequireddifferentfunctionality,itsdesignmethodandprocessarethesame.Afterthesystemispoweredon,performingZMainfile.Thecofthemain()functionrealizationofthehardwareinitialization,including
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