Article(id=1193220114129584280, tenantId=1146029695717560320, journalId=1190306094246359042, issueId=1193220111252287672, articleNumber=null, orderNo=null, doi=10.19595/j.cnki.1000-6753.tces.240752, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1715270400000, receivedDateStr=2024-05-10, revisedDate=1728576000000, revisedDateStr=2024-10-11, acceptedDate=null, acceptedDateStr=null, onlineDate=1762415444166, onlineDateStr=2025-11-06, pubDate=1749484800000, pubDateStr=2025-06-10, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1762415444166, onlineIssueDateStr=2025-11-06, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1762415444166, creator=13701087609, updateTime=1762415444166, updator=13701087609, issue=Issue{id=1193220111252287672, tenantId=1146029695717560320, journalId=1190306094246359042, year='2025', volume='40', issue='11', pageStart='3339', pageEnd='3690', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1762415443479, creator=13701087609, updateTime=1762417281749, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1193227821549056568, tenantId=1146029695717560320, journalId=1190306094246359042, issueId=1193220111252287672, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1193227821549056569, tenantId=1146029695717560320, journalId=1190306094246359042, issueId=1193220111252287672, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=3446, endPage=3459, ext={EN=ArticleExt(id=1193220114343493786, articleId=1193220114129584280, tenantId=1146029695717560320, journalId=1190306094246359042, language=EN, title=Identification of Open-Circuit Fault in Wind Power Converter Based on Mathematical Morphology and Pearson Correlation Coefficient, columnId=null, journalTitle=Transactions of China Electrotechnical Society, columnName=null, runingTitle=null, highlight=null, articleAbstract=
The increasing deployment of wind turbines in challenging environments has led to the prevalent issue of converter faults, which significantly affect the reliability and efficiency of wind power systems. Given the critical role that the converter plays in optimizing the wind power conversion process, detecting and identifying open-circuit fault in wind converter is essential for maintaining operational integrity and maximizing energy output. Current fault identification methods often suffer from limitations related to robustness and computational complexity, necessitating improved solutions. To address these shortcomings, this paper introduces an innovative fault identification method that integrates analysis of the direct current (DC) bus voltage and rotor current characteristics. It can accurately recognize the single and double tube faults of converter power tubes.
Firstly,Fault detection is facilitated by the fact that the DC bus voltage signal is easily accessible, independent of the load and control strategy. Extraction of DC bus voltage edge gradients using mathematical morphology as a feature to detect the occurrence of faults. Secondly, the Pearson correlation coefficients of the rotor side currents are calculated to analyze waveform characteristics. The coupling relationship between the three-phase currents is theoretically deduced, and it is proved that the Pearson correlation coefficients between the two-phase currents are significantly different under different fault conditions, enabling precise identification of the fault phase. Moreover, the location of the fault bridge arm is determined using the average value of the current, enhancing the accuracy of fault identification. Finally, the decision function is used to locate the faulty power tube and realize the fault classification.
Simulation results of the open-circuit fault model of doubly-fed wind power converter show that the proposed method in this paper can accurately determine the occurrence of faults and locate the position of power tubes. By comparing under large data sets, it is found that the proposed method improves the accuracy while maintaining a shorter detection time compared to other methods, which is more practical and reliable. The simulation results show that the wind speed fluctuation has a negligible effect on the DC bus voltage and rotor current, and no fault occurrence is detected, while the current characteristics are stabilized in the range of the fault-free case, which indicates that the proposed method can overcome the interference of wind speed fluctuation. By simulating voltage dips to model the load fluctuations, it is found that the fault detection module misjudges the occurrence of faults, and the current characteristics is small affected but similar in size. It is judged that no faults have occurred, so the fault identification module can be used as a verification of fault detection. A Gaussian white noise with a signal-to-noise ratio of 20 dB is also added to the acquired voltage and current data, and the results show that the proposed method is not disturbed by noise.
The following conclusions can be drawn from the simulation analysis: (1) Compared with existing methods, the method is not only simple and effective in calculation, but also has a higher accuracy rate. (2) The fault detection method based on mathematical morphology utilizes the DC bus voltage, which is easy to obtain data and rapid to detect, and is not affected by noise. (3) The Pearson correlation coefficient-based fault classification method classifies the rotor three-phase currents according to their waveform correlation, and the consistency of theoretical and simulation results shows that the method is effective and of practical significance, and the method has strong robustness.
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由于风电机组工作环境恶劣,电力电子设备脆弱,变流器故障成为风电机组的常见故障之一。而变流器在风力发电系统中起到优化运行的作用,因此针对变流器开路故障的检测与识别至关重要。现有的检测方法存在鲁棒性不强及计算复杂的问题,为此该文提出一种同时基于直流母线电压和转子电流的故障识别方法。该方法基于数学形态学提取直流母线电压故障特征实现故障检测;基于Pearson相关系数提取转子侧三相电流波形特征定位故障相;基于电流平均值定位故障桥臂。该方法计算过程简单,可以准确识别变流器功率管的单管和双管故障,理论推导证明了所提方法的有效性和可靠性。仿真算例考虑了风速波动、负载波动和噪声环境的影响,结果表明所提方法具有较高的准确率及较强的鲁棒性。
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卢奥煊 男,2000年生,硕士研究生,研究方向为风电变流器故障诊断及信号处理。E-mail:202221015205@mail.scut.edu.cn
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卢奥煊 男,2000年生,硕士研究生,研究方向为风电变流器故障诊断及信号处理。E-mail:202221015205@mail.scut.edu.cn
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2009., articleTitle=null, refAbstract=null)], funds=[Fund(id=1193220992622362645, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, awardId=52077081, language=CN, fundingSource=国家自然科学基金(52077081), fundOrder=null, country=null), Fund(id=1193220992672694294, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, awardId=2022A1515011608, language=CN, fundingSource=广东省基础与应用基础研究基金自然科学基金(2022A1515011608), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1193220987547255752, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, xref=null, ext=[AuthorCompanyExt(id=1193220987564032969, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, companyId=1193220987547255752, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=School of Electric Power South China University of Technology Guangzhou 510000 China), AuthorCompanyExt(id=1193220987572421578, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, companyId=1193220987547255752, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=华南理工大学电力学院 广州 510000)])], figs=[ArticleFig(id=1193220989606659054, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=EN, label=Fig.1, caption=
Voltage three-phase IGBT converter, figureFileSmall=WjElvioSL5Vvbclb1mxcVA==, figureFileBig=l39/5UKsYXD439hc5yJP/w==, tableContent=null), ArticleFig(id=1193220989656990703, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=CN, label=图1, caption=
电压型三相IGBT变流器, figureFileSmall=WjElvioSL5Vvbclb1mxcVA==, figureFileBig=l39/5UKsYXD439hc5yJP/w==, tableContent=null), ArticleFig(id=1193220989812179952, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=EN, label=Fig.2, caption=
Typical power tubes open-circuit fault current waveforms, figureFileSmall=yaoybdA0lFoyL5aKmkt1pQ==, figureFileBig=a+jAXXQK3OuSY4R09qyuxw==, tableContent=null), ArticleFig(id=1193220989954786289, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=CN, label=图2, caption=
典型功率管开路故障电流波形, figureFileSmall=yaoybdA0lFoyL5aKmkt1pQ==, figureFileBig=a+jAXXQK3OuSY4R09qyuxw==, tableContent=null), ArticleFig(id=1193220990009312242, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=EN, label=Fig.3, caption=
DC bus voltage waveform, figureFileSmall=Y1RxYmlvBxuXcNrJoF3Xdw==, figureFileBig=8v+kLmgg6W8Ji7szNGfiuA==, tableContent=null), ArticleFig(id=1193220990063838195, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=CN, label=图3, caption=
直流母线电压波形, figureFileSmall=Y1RxYmlvBxuXcNrJoF3Xdw==, figureFileBig=8v+kLmgg6W8Ji7szNGfiuA==, tableContent=null), ArticleFig(id=1193220990126752756, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=EN, label=Fig.4, caption=
Flow chart of the proposed method, figureFileSmall=ZebFpTADRr1yp60zjMm4uA==, figureFileBig=iO6McTOUNas9OmqOI2clnw==, tableContent=null), ArticleFig(id=1193220990185473013, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=CN, label=图4, caption=
方法流程, figureFileSmall=ZebFpTADRr1yp60zjMm4uA==, figureFileBig=iO6McTOUNas9OmqOI2clnw==, tableContent=null), ArticleFig(id=1193220990248387574, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=EN, label=Fig.5, caption=
VT1 fault identification process, figureFileSmall=Qv8Z1dHsIIudGJypYhPqtQ==, figureFileBig=gFs8nGVsvTELGyRFSQCKGQ==, tableContent=null), ArticleFig(id=1193220990315496439, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=CN, label=图5, caption=
VT1故障识别过程, figureFileSmall=Qv8Z1dHsIIudGJypYhPqtQ==, figureFileBig=gFs8nGVsvTELGyRFSQCKGQ==, tableContent=null), ArticleFig(id=1193220990374216696, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=EN, label=Fig.6, caption=
VT1, VT2 fault identification process, figureFileSmall=yOy6G+aU8+0/Nt9mZRq04A==, figureFileBig=4JqarPAuNA3X+8XXU5J4jg==, tableContent=null), ArticleFig(id=1193220990432936953, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=CN, label=图6, caption=
VT1、VT2故障识别过程, figureFileSmall=yOy6G+aU8+0/Nt9mZRq04A==, figureFileBig=4JqarPAuNA3X+8XXU5J4jg==, tableContent=null), ArticleFig(id=1193220990495851514, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=EN, label=Fig.7, caption=
VT1, VT3 fault identification process, figureFileSmall=eFgAGsyMkqOIsM2e4LJS5Q==, figureFileBig=d/7uvKM4IZC5NlmqsAw74A==, tableContent=null), ArticleFig(id=1193220990571348987, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=CN, label=图7, caption=
VT1、VT3故障识别过程, figureFileSmall=eFgAGsyMkqOIsM2e4LJS5Q==, figureFileBig=d/7uvKM4IZC5NlmqsAw74A==, tableContent=null), ArticleFig(id=1193220990634263548, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=EN, label=Fig.8, caption=
VT1, VT4 fault identification process, figureFileSmall=TioKp7gi+yrwL2DXxEckMA==, figureFileBig=0JWWCkNLxUjGfehZ/b+8eQ==, tableContent=null), ArticleFig(id=1193220990697178109, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=CN, label=图8, caption=
VT1、VT4故障识别过程, figureFileSmall=TioKp7gi+yrwL2DXxEckMA==, figureFileBig=0JWWCkNLxUjGfehZ/b+8eQ==, tableContent=null), ArticleFig(id=1193220990760092670, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=EN, label=Fig.9, caption=
Fault recognition process under wind speed fluctuation, figureFileSmall=4TfSuYJVpfzo6p4ABjLz8A==, figureFileBig=iHTu3MUazqhMz5XvbMUGiQ==, tableContent=null), ArticleFig(id=1193220990823007231, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=CN, label=图9, caption=
风速波动下的故障识别过程, figureFileSmall=4TfSuYJVpfzo6p4ABjLz8A==, figureFileBig=iHTu3MUazqhMz5XvbMUGiQ==, tableContent=null), ArticleFig(id=1193220990881727488, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=EN, label=Fig.10, caption=
Fault recognition process under load fluctuation, figureFileSmall=YkUT5AWf/t5SwiVxx90SeQ==, figureFileBig=3ZlS5NjC0eFPK7KkfQ1Xwg==, tableContent=null), ArticleFig(id=1193220990932058112, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=CN, label=图10, caption=
负载波动下的故障识别过程, figureFileSmall=YkUT5AWf/t5SwiVxx90SeQ==, figureFileBig=3ZlS5NjC0eFPK7KkfQ1Xwg==, tableContent=null), ArticleFig(id=1193220990994972673, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=EN, label=Fig.11, caption=
Fault recognition process under noise environment, figureFileSmall=2qiBxvYPkqJWvXzXVa3htA==, figureFileBig=iE2nCzOc7FVs8I9dRDZGdg==, tableContent=null), ArticleFig(id=1193220991078858754, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=CN, label=图11, caption=
噪声环境下的故障识别过程, figureFileSmall=2qiBxvYPkqJWvXzXVa3htA==, figureFileBig=iE2nCzOc7FVs8I9dRDZGdg==, tableContent=null), ArticleFig(id=1193220991124996099, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=EN, label=Fig.12, caption=
RTDS hardware simulation platform, figureFileSmall=mhbQUoKmHwAPOIJQFufGCg==, figureFileBig=13OswnkE8erWrmKrBqmlQQ==, tableContent=null), ArticleFig(id=1193220991175327748, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=CN, label=图12, caption=
RTDS硬件仿真平台, figureFileSmall=mhbQUoKmHwAPOIJQFufGCg==, figureFileBig=13OswnkE8erWrmKrBqmlQQ==, tableContent=null), ArticleFig(id=1193220991221465093, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=EN, label=Fig.13, caption=
RTDS simulation fault identification process, figureFileSmall=zmuJEFZF8iZFF/Ou7z/5kA==, figureFileBig=UdhBMsmM4IIRa7K61n8cuA==, tableContent=null), ArticleFig(id=1193220991280185350, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=CN, label=图13, caption=
RTDS仿真故障的识别过程, figureFileSmall=zmuJEFZF8iZFF/Ou7z/5kA==, figureFileBig=UdhBMsmM4IIRa7K61n8cuA==, tableContent=null), ArticleFig(id=1193220991351488519, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=EN, label=Tab.1, caption=
Circuit switching modes in each zone in the no-fault state
, figureFileSmall=null, figureFileBig=null, tableContent=
| 区间标号 | 调制电压 | 转子电流 | 电路状态 |
| 1, 2 | | | (1-1-1)-(1-1-0)-(0-1-0)-(0-0-0)-(0-1-0)-(1-1-0)-(1-1-1) |
| 3, 4 | | | (1-1-1)-(1-1-0)-(1-0-0)-(0-0-0)-(1-0-0)-(1-1-0)-(1-1-1) |
5 6 | | | (1-1-1)-(1-0-1)-(1-0-0)-(0-0-0)-(1-0-0)-(1-0-1)-(1-1-1) |
| 7, 8 | | | (1-1-1)-(1-0-1)-(0-0-1)-(0-0-0)-(0-0-1)-(1-0-1)-(1-1-1) |
| 9, 10 | | | (1-1-1)-(0-1-1)-(0-0-1)-(0-0-0)-(0-0-1)-(0-1-1)-(1-1-1) |
11 12 | | | (1-1-1)-(0-1-1)-(0-1-0)-(0-0-0)-(0-1-0)-(0-1-1)-(1-1-1) |
), ArticleFig(id=1193220991431180296, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=CN, label=表1, caption=
无故障状态下各区间的电路开关模式
, figureFileSmall=null, figureFileBig=null, tableContent=
| 区间标号 | 调制电压 | 转子电流 | 电路状态 |
| 1, 2 | | | (1-1-1)-(1-1-0)-(0-1-0)-(0-0-0)-(0-1-0)-(1-1-0)-(1-1-1) |
| 3, 4 | | | (1-1-1)-(1-1-0)-(1-0-0)-(0-0-0)-(1-0-0)-(1-1-0)-(1-1-1) |
5 6 | | | (1-1-1)-(1-0-1)-(1-0-0)-(0-0-0)-(1-0-0)-(1-0-1)-(1-1-1) |
| 7, 8 | | | (1-1-1)-(1-0-1)-(0-0-1)-(0-0-0)-(0-0-1)-(1-0-1)-(1-1-1) |
| 9, 10 | | | (1-1-1)-(0-1-1)-(0-0-1)-(0-0-0)-(0-0-1)-(0-1-1)-(1-1-1) |
11 12 | | | (1-1-1)-(0-1-1)-(0-1-0)-(0-0-0)-(0-1-0)-(0-1-1)-(1-1-1) |
), ArticleFig(id=1193220991515066377, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=EN, label=Tab.2, caption=
Circuit switching modes under each interval of VT1 open-circuit fault state
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| 区间标号 | 调制电压 | 转子电流 | 电路状态 |
| 1, 2 | | | (1-1-1)-(1-1-0)-(0-1-0)-(0-0-0)-(0-1-0)-(1-1-0)-(1-1-1) |
| 3, 4 | | | (1-1-1)-(1-1-0)-(1-0-0)-(0-0-0)-(1-0-0)-(1-1-0)-(1-1-1) |
| 5 | | | (1-1-1)-(1-0-1)-(1-0-0)-(0-0-0)-(1-0-0)-(1-0-1)-(1-1-1) |
| 6 | | | (1-1)-(0-1)-(0-0-0)-(0-1)-(1-1) |
| 7, 8 | | | (1-1)-(0-1)-(0-0-0)-(0-1)-(1-1) |
| 9, 10 | | | (1-1)-(0-1)-(0-0-0)-(0-1)-(1-1) |
| 11 | | | (1-1)-(1-0)-(0-0-0)-(1-0)-(1-1) |
| 12 | | | (1-1-1)-(0-1-1)-(0-1-0)-(0-0-0)-(0-1-0)-(0-1-1)-(1-1-1) |
), ArticleFig(id=1193220991586369546, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=CN, label=表2, caption=
VT1开路故障状态下各区间下的电路开关模式
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| 区间标号 | 调制电压 | 转子电流 | 电路状态 |
| 1, 2 | | | (1-1-1)-(1-1-0)-(0-1-0)-(0-0-0)-(0-1-0)-(1-1-0)-(1-1-1) |
| 3, 4 | | | (1-1-1)-(1-1-0)-(1-0-0)-(0-0-0)-(1-0-0)-(1-1-0)-(1-1-1) |
| 5 | | | (1-1-1)-(1-0-1)-(1-0-0)-(0-0-0)-(1-0-0)-(1-0-1)-(1-1-1) |
| 6 | | | (1-1)-(0-1)-(0-0-0)-(0-1)-(1-1) |
| 7, 8 | | | (1-1)-(0-1)-(0-0-0)-(0-1)-(1-1) |
| 9, 10 | | | (1-1)-(0-1)-(0-0-0)-(0-1)-(1-1) |
| 11 | | | (1-1)-(1-0)-(0-0-0)-(1-0)-(1-1) |
| 12 | | | (1-1-1)-(0-1-1)-(0-1-0)-(0-0-0)-(0-1-0)-(0-1-1)-(1-1-1) |
), ArticleFig(id=1193220991657672715, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=EN, label=Tab.3, caption=
Converter open circuit fault types
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| 故障类型 | 故障编号 | 故障描述 |
| — | 0 | 无故障 |
| Ⅰ | 1~6 | 单只IGBT管故障 |
| Ⅱ | 7~9 | 同桥臂两只IGBT管故障 |
| Ⅲ | 10~15 | 同一半桥两只IGBT管故障 |
| Ⅳ | 16~21 | 不同桥臂上下两只IGBT管故障 |
), ArticleFig(id=1193220991728975884, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=CN, label=表3, caption=
变流器开路故障类型
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| 故障类型 | 故障编号 | 故障描述 |
| — | 0 | 无故障 |
| Ⅰ | 1~6 | 单只IGBT管故障 |
| Ⅱ | 7~9 | 同桥臂两只IGBT管故障 |
| Ⅲ | 10~15 | 同一半桥两只IGBT管故障 |
| Ⅳ | 16~21 | 不同桥臂上下两只IGBT管故障 |
), ArticleFig(id=1193220991783501837, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=EN, label=Tab.4, caption=
Absolute values of Pearson correlation coefficient for different fault types
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| 开路故障类型 | | | |
| 无故障 | ≈0.5 | ≈0.5 | ≈0.5 |
| Ⅰ(VT1) | <0.25 | >0.65 | ≈0.5 |
| Ⅱ(VT1,VT2) | ≈0 | ≈0 | ≈1 |
| Ⅲ(VT1,VT3) | 0.25~0.65 | 0.25~0.65 | 0.25~0.65 |
| Ⅳ(VT1,VT4) | ≈0 | >0.65 | >0.65 |
), ArticleFig(id=1193220991854805006, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=CN, label=表4, caption=
不同故障类型的Pearson相关系数绝对值
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| 开路故障类型 | | | |
| 无故障 | ≈0.5 | ≈0.5 | ≈0.5 |
| Ⅰ(VT1) | <0.25 | >0.65 | ≈0.5 |
| Ⅱ(VT1,VT2) | ≈0 | ≈0 | ≈1 |
| Ⅲ(VT1,VT3) | 0.25~0.65 | 0.25~0.65 | 0.25~0.65 |
| Ⅳ(VT1,VT4) | ≈0 | >0.65 | >0.65 |
), ArticleFig(id=1193220991913525263, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=EN, label=Tab.5, caption=
Fault classification judgment condition
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| 故障类型 | 故障功率管 | | | | |
| 无故障 | 无 | 0 | 0 | 0 | |
| Ⅰ | VT1 | -1 | 1 | 0 | |
| VT2 | -1 | 1 | 0 | |
| VT3 | 0 | -1 | 1 | |
| VT4 | 0 | -1 | 1 | |
| VT5 | 1 | 0 | -1 | |
| VT6 | 1 | 0 | -1 | |
| Ⅱ | VT1, VT2 | -1 | 1 | -1 | — |
| VT3, VT4 | -1 | -1 | 1 | — |
| VT5, VT6 | 1 | -1 | -1 | — |
| Ⅲ | VT1, VT3 | 0 | — | — | |
| VT1, VT5 | — | — | 0 | |
| VT2, VT4 | 0 | — | — | |
| VT2, VT6 | — | — | 0 | |
| VT3, VT5 | — | 0 | — | |
| VT4, VT6 | — | 0 | — | |
| Ⅳ | VT1, VT4 | -1 | 1 | 1 | |
| VT1, VT6 | 1 | 1 | -1 | |
| VT2, VT3 | -1 | 1 | 1 | |
| VT2, VT5 | 1 | 1 | -1 | |
| VT3, VT6 | 1 | -1 | 1 | |
| VT4, VT5 | 1 | -1 | 1 | |
), ArticleFig(id=1193220991984828432, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=CN, label=表5, caption=
故障分类判别条件
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| 故障类型 | 故障功率管 | | | | |
| 无故障 | 无 | 0 | 0 | 0 | |
| Ⅰ | VT1 | -1 | 1 | 0 | |
| VT2 | -1 | 1 | 0 | |
| VT3 | 0 | -1 | 1 | |
| VT4 | 0 | -1 | 1 | |
| VT5 | 1 | 0 | -1 | |
| VT6 | 1 | 0 | -1 | |
| Ⅱ | VT1, VT2 | -1 | 1 | -1 | — |
| VT3, VT4 | -1 | -1 | 1 | — |
| VT5, VT6 | 1 | -1 | -1 | — |
| Ⅲ | VT1, VT3 | 0 | — | — | |
| VT1, VT5 | — | — | 0 | |
| VT2, VT4 | 0 | — | — | |
| VT2, VT6 | — | — | 0 | |
| VT3, VT5 | — | 0 | — | |
| VT4, VT6 | — | 0 | — | |
| Ⅳ | VT1, VT4 | -1 | 1 | 1 | |
| VT1, VT6 | 1 | 1 | -1 | |
| VT2, VT3 | -1 | 1 | 1 | |
| VT2, VT5 | 1 | 1 | -1 | |
| VT3, VT6 | 1 | -1 | 1 | |
| VT4, VT5 | 1 | -1 | 1 | |
), ArticleFig(id=1193220992085491729, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=EN, label=Tab.6, caption=
Main parameters of the system model
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| 参 数 | 数 值 |
| 直流母线电压/V | 1 150 |
| 额定功率/(MV·A) | 1.5 |
| 额定电压/V | 575 |
| 涡轮机初始转速(pu) | 1.2 |
| 初始输出转矩(pu) | 0.83 |
| 定子电阻(pu) | 0.023 |
| 定子电感(pu) | 0.18 |
| 转子电阻(pu) | 0.016 |
| 转子电感(pu) | 0.16 |
| 定转子互感(pu) | 2.9 |
| 极对数 | 3 |
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系统模型主要参数
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| 参 数 | 数 值 |
| 直流母线电压/V | 1 150 |
| 额定功率/(MV·A) | 1.5 |
| 额定电压/V | 575 |
| 涡轮机初始转速(pu) | 1.2 |
| 初始输出转矩(pu) | 0.83 |
| 定子电阻(pu) | 0.023 |
| 定子电感(pu) | 0.18 |
| 转子电阻(pu) | 0.016 |
| 转子电感(pu) | 0.16 |
| 定转子互感(pu) | 2.9 |
| 极对数 | 3 |
), ArticleFig(id=1193220992215515155, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=EN, label=Tab.7, caption=
Algorithm validation results
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| 文献 | 平均检测时间/s | 准确率(%) |
[28] [27] | 0.021 0.044 | 50.00 68.19 |
[29] [18] | 0.025 0.083 | 90.91 98.00 |
| 本文提出方法 | 0.024 | 99.50 |
), ArticleFig(id=1193220992282624020, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1193220114129584280, language=CN, label=表7, caption=
算法验证结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 文献 | 平均检测时间/s | 准确率(%) |
[28] [27] | 0.021 0.044 | 50.00 68.19 |
[29] [18] | 0.025 0.083 | 90.91 98.00 |
| 本文提出方法 | 0.024 | 99.50 |
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