上海西郊变STATCOM的测控技术研究

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1、上海交通大学硕士学位论文上海西郊变statcom的测控技术研究姓名：李珅申请学位级别：硕士专业：电力系统及其自动化指导教师：邰能灵;吴均20070701上海交通大学工程硕士学位论文《上海西郊变statcom的测控技术研究》接方式对所有的链节两两进行试验。实验结果表明，主电路单元、控制与保护单元、检测与故障诊断单元及冷却系统在试验期间都应无异常现象发生。论文最后对上述研究成果进行了总结，指出发展STATCOM装置具有巨大的社会效益，对国民经济发展有积极的意义，代表了现阶段无功补偿、电能质量控制的发展方向。关键词：上海西郊变，STATCOM，电压稳定，测控技术，主电路单元，控

2、制与保护，监测与故障诊断，链式结构II上海交通大学工程硕士学位论文《上海西郊变statcom的测控技术研究》Researchofthemeasurementandcontrolsystemfor±50MVAcascadedSTATCOMABSTRACTThe220kvXijiaosubstationislocatedatthecentralareaofnorthwestdistinctinShanghai,whichisthecoresubstationinHuangdusubzoneofShanghaielectricpowergrid.Theloadinthisare

3、aisconcentratedlargeandthevolumeofpowerexchangeisnumerous.Thechangerateofbusvoltagealongwiththeloadisalsoquick.Thecurrentreactivepowercompensationequipmentcannotprovidethedynamicvoltagesupportingwhenthereisthesystemfailure.Eventuallyitcannotguaranteetheoperationalstabilityofthepowernetwor

4、kinthearea.Itisdeservedtopayacloseattentiontotheprojectthathowtocontrolthebusvoltageinwestsuburbinasafe,reliable,effectiveway,especiallyinthecaseofsystemfailure.TheStaticSynchronousCompensator(STATCOM)belongstothepowerflowcontrolequipmentofFlexibleACTransmissionSystems(FACTS).Thereactivec

5、urrentoutputcanbestablewhenthevoltagefluctuatesinalargerange.Itcanstillprovideapowerfulreactivepowersupportingwhenthevoltageislow,andcanbecontinuousfromcapacitivestatustoinductivestatus.STATCOMcanalsorestraintvoltageflickerandincreasesystemtransientstability.Consideringourcountry’sbasicco

6、nditionandcurrenttechnology,developingSTATCOMisaneffectivemethodtosolveproblemofthevoltagestabilityinourcountry.Thispaperconcludestheauthor’sresearchworksonSTATCOM,themaincontentsarestatedbelow:1.Itproposesageneraldesignof50MVASTATCOMproject.Aftercomparisonandanalysisofseveralversionsandt

7、heexperienceof20MVASTATCOM,themaincircuitof50MVASTATCOMusechainpatterninverter,andthepowerdeviceuseIGCT.STATCOMmainlyconsistofsinglephaseinverterwiththreephaseschainpattern,6connectedreactors,highvoltageswitchboard,boostingtransformer,control/supervisorunits,protect