變電站電力操作直流電源系統(tǒng)的研究.pdf

1、湖南大學(xué)碩士學(xué)位論文變電站電力操作直流電源系統(tǒng)的研究姓名：彭剛毅申請學(xué)位級別：碩士專業(yè)：控制理論與控制工程指導(dǎo)教師：歐陽紅林20060426碩士學(xué)位論文AbStractElectricityenergyhasbecomemoreandmoreimportantindailylifePowersystemmustworksafeandreliabletoinsurethenormalofpowersupplysystemSoDCpower

2、systemmustworkreliable，whichisthecoreofpowersystem，transformersubstationHighfrequencyswitchingpowersupplyadoptingsoftswitchingtechnology，whichhasreliablehighefficiencyandlongusetimeperformancesbecomestheimportantpartofDC

3、powersystemModemnetworktechnologyandcomputercontroltechnologyhavebeenappliedintotheDCpowersystem，whichrealizesremotemonitorofpowersystemTherefore，itcanbringsafeandreliablepowersupplyforfirstusedevicesinsubstationandmakes

4、productandlivesbetterAtthebeginningofthepaper，everycomponentsofDCpowersystemareintroducedThen，systemdesignrulesaregivenForkeycomponentsandkeytechnologies，theyarediscusseddetailedinanotherpartofpaperChargeanddischargemodu

5、laristhecoreofDCpowersystemAnditisalsothecoreofthepaper，whichinfluencestheuselifeofbatteryandthesystemreliabilityAsisknown，conventionalchargeanddischargemodularusesphasecontrolrectificationtechnology，whichbringsbigchange

6、ofoutputvoltage，interruptofelectricalmagnetic，lowefficiency，andlargesizeBecauseofthese，ahighfrequencyswitchingsupplybasedonphaseshiftcontrolfullbridgePWMsoftswitchingtechnologycansolvetheflawsThephaseshiftcontrolfullbrid

7、gePWMtechnologyrenderstheswitchersofconverterworksunderZeroVoltageZeroCurrentSwitchingcondition，whichcanreducesswitchingtoss，butalsocandecreasethesizeoftheconverterandenhancethepowerdensityofsystemandmaketheoutputmorerel

8、iableItisveryusefulforprotectingthebatteryandthesystemDistributedpowersupplyhasextendable，highefficiencyandresponsefastperformances，whichbecomesthehotintheworldItcombinessmallpowersupplyunittogethertosupplypowerforsystem