文档名：考虑原动机调速特性的中压直流发电机组动态仿真模型
摘要：鉴于原动机调速特性对舰船中压直流(MVDC)发电机组运行影响的重要性,该文基于十二相同步发电机及其三相交流励磁机数学模型提出MVDC发电机组动态建模方法,以解决多相整流发电机及其励磁系统难以考虑原动机动态调速特性的难题.以某型燃气轮机整流发电机组动态仿真模型为基础,建立了频率不同的十二相同步发电机与三相交流励磁机组合模型,阐述原动机调速与发电机励磁调压相互耦合的计算流程.实测与仿真结果表明,该型燃气轮机发电机组在突加20%负载工况时转速跌落较大,且转速恢复过程需约20s,但MVDC发电机组通过调节励磁系统可在1s内使直流母线电压恢复稳定,从而为负载提供稳定直流功率输出.在校准仿真模型的基础上,通过系统分析突加不同比例负载时的转速、燃油流量、励磁电流、输出电压等性能参数变化规律,获取了燃发机组允许突加负载上限约为30%的运行边界认知,为MVDC发电机组励磁系统设计以及如何预留充足的短时强励能力提供了理论支撑.
Abstract：ComparedwiththemediumvoltageAC(MVAC)integratedpowersystem,themediumvoltageDC(MVDC)integratedpowersystemeliminatestheinfluencebetweentherotationalspeedoftheprimemoverandthefrequencyofthepowergrid,providinganeffectivesolutionfortheparallelpowersupplyofmultiplegasturbinegeneratorsets,dieselenginegeneratorsets,andsteamturbinegeneratorsetswithdifferentspeedregulationcharacteristicsandmagnitudedifferencesincapacity.InMVDCintegratedpowersystems,amulti-machineparallelpowersupplyiscommonlyusedtoimprovefueloperationeconomyandpowersupplyreliability.Ifasingleunittrips,itwilltriggeradynamicprocessofsuddenloadapplicationtounitsonthegrid.ThestabilityofthegridvoltageiscrucialatthebeginningofthedesignoftheMVDCintegratedpowersystem,whichiscloselyrelatedtothespeedregulationoftheprimemoverandthevoltageregulationofthegenerator.Therefore,itisnecessarytoestablishadynamicsimulationmodelforMVDCgeneratorunitsconsideringthespeedregulationcharacteristicsoftheprimemover.Basedontraditionalmodelingmethodsforsynchronousgenerators,thispapertakesatimebasevalueof1,unifyingtheelectricalangularvelocityinputinterfaceofthemathematicalmodelsfortwelve-phasesynchronousgeneratorsandtheirthree-phaseexciters.Avariablecoefficientmatrixsimulationmodelwithhighorderandstatespaceisestablishedconsideringthespeedvariation,asshowninFig.A1.AdynamicmodelingmethodforMVDCgeneratorsetsisconstructedwithspeedregulationcharacteristicsofprimemovers.Takingagasturbinegeneratorunitasanexample,thedynamicsimulationmodelisestablishedinMatlab/Simulinksoftware,asshowninFig.A2.TheoutputelectromagnetictorqueoftheMVDCgeneratoranditsexcitationsystemisintroducedintothegasturbineanditsspeedgoverningsystem,andtheoutputrotationalspeedisconnectedtotheMVDCgeneratoranditsexcitationsystem,whichachievesstrongcouplingnumericalsimulationcalculationsfortheprimemover'sspeedregulationandthegeneratorexcitation'svoltageregulation.Thedynamicperformanceofarealsystemundertheno-loadsuddenloadconditionissimulated,comparingtheexperimentaldatafromactualMVDCgas-turbinepowergenerationunitsunderasuddenloadconditionof20%.Thecomparisonrevealsconsistentrotationalspeedoutputwaveforms(Fig.A1)andDCvoltageoutputwaveforms(Fig.A2).Keydynamicperformanceindicatorsareanalyzed,includingtransientspeedregulationrate,transientvoltageregulationrate,rotationalspeed,andvoltagerecoverytime.Themaximumrelativeerrorbetweenthesimulationandtheexperimentis2.91%,verifyingtheaccuracyofthedynamicperformancesimulationanalysisoftheMVDCgeneratorsetmodel.
作者：易新强 王东 刘海涛 赵浩然 袁志方Author：YiXinqiang WangDong LiuHaitao ZhaoHaoran YuanZhifang
作者单位：电磁能技术全国重点实验室(海军工程大学)武汉430033
刊名：电工技术学报 ISTICEIPKU
Journal：TransactionsofChinaElectrotechnicalSociety
年，卷(期)：2024, 39(10)
分类号：TM314
关键词：原动机调速特性 MVDC发电机组 十二相整流发电机 动态仿真模型
Keywords：Speedcharacteristicsofprimemover MVDCgeneratorset twelve-phaserectifiergenerator dynamicsimulationmodel
机标分类号：TM343TM712U665.18
在线出版日期：2024年5月31日
基金项目：国家自然科学基金，国家自然科学基金考虑原动机调速特性的中压直流发电机组动态仿真模型[
期刊论文] 电工技术学报--2024, 39(10)易新强 王东 刘海涛 赵浩然 袁志方鉴于原动机调速特性对舰船中压直流(MVDC)发电机组运行影响的重要性,该文基于十二相同步发电机及其三相交流励磁机数学模型提出MVDC发电机组动态建模方法,以解决多相整流发电机及其励磁系统难以考虑原动机动态调速特性的...参考文献和引证文献
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