基金项目:国家自然科学基金(61963034)收稿日期:2021-05-25修回日期:2021-06-07第40卷第4期计算机仿真2023年4月文章编号:1006-9348(2023)04-0083-06基于键合图的T型逆变器参数性故障诊断樊鹏帅,帕孜来·马合木提,魏胜风(新疆大学电气工程学院,新疆乌鲁木齐830046)摘要:针对三电平并网逆变器早期参数性退化特征难以提取,传统的基于电压和电流的故障诊断方法存在诊断困难的问题,提出基于键合图(BondGraph,BG)理论来建立三电平T型逆变器的键合图模型,根据T型三电平逆变器的BG模型推导出了其全局解析冗余关系式(GlobalAnalyticalRedundancyRelatIons,GARRs),列出了故障特征矩阵(faultsignaturematrix,FSM)。通过比较T型逆变器在正常情况下与参数退化情况下的残差信号实现了对逆变器多故障源的参数性故障诊断。最后在20-sim仿真平台上验证了上述方法的有效性。关键词:键合图;参数性故障诊断;解析冗余;三电平逆变器中图分类号:TP391.9文献标识码:BParametricFaultDiagnosisofT-TypeInverterBasedonBondGraphFANPeng-shuai,PAZi-lai,WEISheng-feng(ElectricalEngineeringCollege,XinjiangUniversity,UrumqiXinjiang830046,China)ABSTRACT:Inviewofthedifficultyofextractingtheearlyparametricfaultcharacteristicsofthethree-levelgrid-connectedinverter,thetraditionalfaultdiagnosismethodbasedonvoltageandcurrenthasdifficultyindiagnosing,andthekeyingdiagrammodelofthethree-levelT-typeinverterisproposedbasedonbondGraph(BG),anditsglobalresolutionredundancyrelationship(AnalyticalGlobalRedundancyInters)isderivedaccordingtotheBGmodeloftheT-typetriple-levelinverter,whichliststhefaultcharacteristicmatrix(faultsignaturematrix,FSM).Parametricfaultdiagnosisoftheinverter'smultiplefaultsourcesisachievedbycomparingtheresidualsignaloftheT-typeinverterundernormalconditionswiththeparameterdegradation.Finally,theeffectivenessofthismethodisverifiedonthe20-simsimulationplatform.KEYWORDS:BondGraph(BG);Parametricfaultdiagnosis;Analyticalredundancy;Three-levelinverter1引言逆变器在实际运行中,由于环境及内部应力的影响,元器件的标称参数会发生退化现象。当参数退化超出阈值即发生参数性故障(软故障)。此类故障发生后如果不能找出故障原因,故障会持续存在并诱发连锁效应[1]:可能使输出特性改变,影响电能质量;或...
