Overview_of_the_HVDC_Control_System

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1、ABBPowerSystemsTechnicalReportDocumentNumberNoofPagesTheThreeGorges-Changzhou±500kVDC1JNL100033-10627TransmissionProjectNoofAttachedPagesPreparedTitleReg./Classno.KerstinLindén2001-01-08OverviewoftheHVDCControlWS-F-10ApprovedRespDeptSystemAnna-KarinSkytt,2001-03-26LSTThis

2、documentisissuedbymeansofacomputerizedsystem.Thedigitallystoredoriginaliselectronicallyapproved.Theapproveddocumenthasanameanddateenteredintheapproved-field.Amanualsignatureisnotrequired.SummaryThisreportgivesapresentationofthebasicprinciplesoftheHVDCcontrolsystemfortheTh

3、reeGorgestransmissionsysteminaneasilyunderstandableform.Itcoversallessentialcontrolfunctionsusedforpowerflow-controlandreferstofiguresofthetypesblockdiagrams,waveformsandcharacteristics,specificallydrawnforthisreport.Theintentionhasbeentopresentcompactdiagramsinwhichthenu

4、mberofdetailsissufficientenoughtomakeiteasytounderstand,followthesignalpaths,supportedbythewaveformdiagramsandthecharacteristics.RevindRevisiontextPreparedApprovedWereserveallrightsinthisdocumentandinthe-1-informationcontainedherein.Reproduction,useordisclosuretothirdpart

5、ieswithoutexpressauthorityisstrictlyforbidden.ABBPowerSystemsAB(SE)ABBPowerSystemsTechnicalReportOverviewoftheHVDCControlSystem1JNL100033-106TableofContents1INTRODUCTION..................................................................32BASICSOFCONTROLPRINCIPLES..........

6、.......................32.1BasicControlCharacteristics...............................................33THEPOLECONTROLSYSTEM.........................................63.1TheConverterFiringControlCFC).......................................73.1.1Thephased-lockedloop(PLL).....

7、........................................83.1.2Generationofthearesponse,aPCO....................................103.1.3MeasuringaPLL...................................................................103.1.4Firingtimegeneration...............................................

8、..........113.1.5Invertercontrolincommutationmarginmode.....................124THECURRENTCONTROL