基于Zigbee的地鐵雜散電流監(jiān)測(cè)系統(tǒng)的設(shè)計(jì).pdf

1、西南交通大學(xué)碩士學(xué)位論文基于Zigbee的地鐵雜散電流監(jiān)測(cè)系統(tǒng)的設(shè)計(jì)姓名：胡楠申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：電力系統(tǒng)及其自動(dòng)化指導(dǎo)教師：王倩20090501西南交通大學(xué)碩士研究生學(xué)位論文第1I頁AbstractInDCrailtransitsystemstherunningrailsareusuallyusedasthereturnconductorfortractioncurrentThisarrangementmainlyfocuseso

2、neconomicconsiderations，sinceitdoesnotrequiretheinstallationofanadditionalreturnconductorTherailsalongtherailway，whichlieexposedontheground，willeasilycauselargerstraycurrent、7ivhenthetrainoperatesinheavytransportationofm

3、assrailtransit(MRT)systems，thecurrentrequiredbythetrainwillbequitelargeuptoseveralthousandamperesandtheresistanceoftherunningrailwillbeaboutseveralmilliohmstotensofmilliohmsperkilometerTherefore，asignificantvoltagedropon

4、therunningrailwillbegeneratedThisvoltagedropwillforcepartsofthecurrenttoleakfromtherailandflowintopipeworkintheearthorsteelbarsinastructureAfterwardsthecurrent1eavesthepipeorsteelbarandflowsthroughtheearthbackintothenega

5、tivesideofthetractionsubstationThiscurrentisknownasthestraycurrentortheleakagcurrentStraycurrentcauseselectricalcorrosionnotonlytothestructureandpipinginMRTsystemsbutalsotoadjacentstructuresandundergroundpiping，including

6、thosecarryingoil，gasandwaterwiththeadvantageoflowpowerconsumption10wcostandeasygroupnetwork，Zigbeeisanewglobalstandardforwirelessconnectivityhavingwideforegroundofproductswithinhomecontrol，buildingautomationandindustrial

7、controlandmonitoringThisthesisanalyzedthemonitorsystemofstraycurrenthomeandabroadandposedanewmonitorsystemofstraycurrentbasedonwirelessnetworkFirst，posedatransformersbstaionmonitorsystemofstraycurrentsystemdesignbasedonZ

8、igbeewirelessnetworkSecond，ZigbeestudiedvariouscommunicationprotocolslevelofthespecificfunctionandroleUsedJenniccorporation’SⅢ5139R1modulewhichconforillstotheZigbeestandardandAI洲9astheCOre，thethesisdesignedtheterminaland