中国散裂中子源快循环同步加速器电源系统数字化控制方案

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1、131ò111ÏpUÔn†ØÔnVol.31,No.112007c11HIGHENERGYPHYSICSANDNUCLEARPHYSICSNov.,2007ADigitalControlSchemeofPowerSupplySystemforRCS/CSNS1)HUWeiZHANGJingQIXin(InstituteofHighEnergyPhysics,CAS,Beijing100049,China)AbstractA1.6GeVprotonrapidcyclesynchrotron(RCS)wasdesigne

2、dintheChineseSpallationNeutronSource(CSNS)Project.Themagnetpowersupplysystemofthesynchrotrondrivesninesetsofindependent25HzWhiteCircuit.TheoutputcurrentsoftheninesetsofmagnetpowersupplyaretheDC-biasedACsource.Thecurrents(magneticelds)mustmeettherequirementsofth

3、ephaseandamplitudeaccuracyduringtheacceleratorrepetitioncycle.Becauseoftheadvantagesofthedigitalcontroltechniquesuchasreliability,temperaturedriftrejection,andhighintegrationandsoon,ithasbeenadoptedmoreandmorewidelyintheequipmentdesign.Toachievetherigorousgoalss

4、uchasstabilityandTHD(TotalHarmonicDistortion)intheRCS/CSNSmagnetpowersupplysystem,adigitalcontrolschemewillbeimplementedwhichwillbepresentedinthispaper.KeywordsWhiteCircuit,powersupplysystem,stability,totalharmonicdistortion,digitalcontrol1Introduction2Congurat

5、ionofthepowersupplysystemThereareseventy-twomagnetsintheRCSandtheyaredividedintoninefamiliesshowninTable1:Thespecicationsforthepowersupplyoutputoneforthebendingmagnets(BM)andeightforthecurrentcouldbededucedfromtherequirementsofquadrupolemagnets(QM),andninesetso

6、fpower0.1%magnetcurrenttrackingerroramongtheninesupplyareemployedforexcitingthesemagnetfam-magnetfamilies,andarelistedbelow:iliesrespectively.Accordingtothebeamdynam-1)Amplitudestabilitybetterthan0.1%;ics,thetrackingerrorofthemagnetexcitingcurrent2)Phaseerrorles

7、sthan10s;(magneteld)amongtheninemagnetfamiliesshould3)Frequencystabilitybetterthan0.01%;belessthan0.1%.4)THD(TotalHarmonicDistortion)lessthan0.02%.Table1.MagnetsclassicationinRCS.[1]2.1WhiteCircuitmagnettypenumberbendingmagnetBM24WhiteCircuitiswidelyusedinRCS

8、magnetQFC18QFC28powersupplysystem,becausethepowersupplyisQFC34onlyburdenedwiththeelementsactivelosswhilequadrupolemagnetQD8thereactivepower owsbetweenthemagnetsandQF8