變電站直流電源的監(jiān)控系統(tǒng)設(shè)計(jì)與實(shí)現(xiàn).pdf

1、大連理工大學(xué)碩士學(xué)位論文變電站直流電源的監(jiān)控系統(tǒng)設(shè)計(jì)與實(shí)現(xiàn)姓名：薛瑞琮申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：軟件工程指導(dǎo)教師：江榮安20080607變電站直流電源的監(jiān)控系統(tǒng)設(shè)計(jì)與實(shí)現(xiàn)DesignandRealizationofSupervisoryControlSystemofDCPowerSupplyinTransformerSubstationAbs仃actDCPowerSystemprovidesreserveenergyfortheelect

2、ricequipmentsofsignalappliances，relayingprotection，automationaccidentsillumination，opencircuitandswitchingespeciallyincaseofalloutsidealternatingcurrentfailure，thusitServesasafundamentalguaranteefortheproperfunctioningof

3、thesedevices，thestabilityofwhichplaysakeyroleinthepreventionofsystemdestructionaccidentdeteriorationandequipmentdamageThecharginganddischargingboard嬲thecorecomponentoftheDCpowersupplyisthetopemphasisofthisresearchasitsfu

4、nctioningdirectlyimpactstheenduranceexpectancyofthestoragebatteryThispapercarriesoutallcarefulanalysisofdemand，structure，functionsandprocessesofDCPowerSupplyandSupervisoryControlSystem，based011whichthePaperimplementsadet

5、aileddesignInthetraditionalapproachthecharginganddischargingboardemploysthemutualrectificationtechnique，whosedrawbackisevidentinbringingaboutalargeoutputvoltagewave，seriousharmonicwavepollution，lowconversionefficiencyand

6、giganticvolumeTosolvethedrawbackoftraditionalsystem，thissystemtakesadvantageoftheFastTransientsConvertertechnique，appliesautomatedlowdifferenceandmixedcurrenttechniqueaswellasboththebalancedbridgeandunbalancedbridgeformu

7、latoimplementInthefieldofteclmique，thissystemisbasedonC／Sstructure，usingVisualC60forthedevelopmentofsoftwareandSQLSever2000asdatabasetodevelopTheapplyingofkindsoftechniquesCallgreatlyreducethepowerleakageresultingfromswi

8、tchingprocessesandthusincreaseconvertingefficiencywiththefullloadedeffectivepowerreaching94％Meanwhile，thepowerswitchdevicesundergolowerstress，whichcontributestolongerfunctioningperiodandenhancedreliabilityIncaseofonemodu

9、le’Sfailureinfunctioningforsomeunknownleasons，thesystemwilladjusttheoutputcurrentspontaneouslyandreachanewbalance，thusavoidingasystemblackoutowingtosomemodulebreakupandthereforetransformingreliabilityCanbegreatlyincrease

10、dBesides，thedetectionspeedforgroundconnectiondefectsandtheprecisionofmeaSurementingroundconnectionresistanceCanbehighlyimprovedKeyWords：Integrativemonitor；Intelligentbatterymanagement；Returnvoltagedifference：Selfcalibrat