Article(id=1202649045530538135, tenantId=1146029695717560320, journalId=1190235702286704641, issueId=1202649045064970391, articleNumber=null, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1732464000000, receivedDateStr=2024-11-25, revisedDate=1735056000000, revisedDateStr=2024-12-25, acceptedDate=null, acceptedDateStr=null, onlineDate=1764663476593, onlineDateStr=2025-12-02, pubDate=1744646400000, pubDateStr=2025-04-15, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1764663476593, onlineIssueDateStr=2025-12-02, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1764663476593, creator=13701087609, updateTime=1764663476593, updator=13701087609, issue=Issue{id=1202649045064970391, tenantId=1146029695717560320, journalId=1190235702286704641, year='2025', volume='26', issue='4', pageStart='1', pageEnd='84', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1764663476482, creator=13701087609, updateTime=1768394410677, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1218297717336490184, tenantId=1146029695717560320, journalId=1190235702286704641, issueId=1202649045064970391, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1218297717336490185, tenantId=1146029695717560320, journalId=1190235702286704641, issueId=1202649045064970391, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=1, endPage=6, ext={EN=ArticleExt(id=1202649045786390681, articleId=1202649045530538135, tenantId=1146029695717560320, journalId=1190235702286704641, language=EN, title=Virtual inertia current limiting method for grid-forming converters with enhanced synchronous stability, columnId=1190338913429459072, journalTitle=Electrical Engineering, columnName=Research & Development, runingTitle=null, highlight=null, articleAbstract=
In grid-forming converters with weak overcurrent capability, it is generally necessary to introduce the current limiter to ensure fault current limiting. However, the synchronization stability of the system is weakened after triggering the current limiter, which is seldom comprehensively considered and addressed in existing studies. To this end, the phasor diagram method is used to reveal the fault current characteristics in this paper. Then, the adverse impact of the current limiter on the synchronization stability of the converter is analyzed based on the power angle characteristic curves and the extended equal area criterion. Thus, a virtual inertia current limiting method for grid-forming converters with enhanced synchronous stability is proposed, which simultaneously solves the fault current limiting and synchronous stability problems of converters by quantitatively controlling the virtual inertia. Finally, the correctness of the theoretical analysis and the effectiveness of the proposed method are verified by Matlab/Simulink simulation experiments.
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在弱过电流能力的构网型变流器中,一般需要引入电流限幅以保证故障限流。然而,电流限幅触发后系统同步稳定性遭到削弱,现有研究鲜有对此问题进行综合考虑并加以解决。为此,本文首先利用相量图法揭示了故障电流特性;接着,基于功角特性曲线和扩展等面积准则分析了电流限幅对变流器同步稳定性的不利影响。由此,本文提出一种增强同步稳定的构网型变流器虚拟惯量限流方法,通过定量控制虚拟惯量同时解决了变流器的故障限流和同步稳定问题。最后,通过Matlab/Simulink仿真实验验证了理论分析的正确性和所提方法的有效性。
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孙东伟(2000—),男,福建省泉州市人,硕士研究生,主要研究方向为新能源与储能应用技术。
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孙东伟(2000—),男,福建省泉州市人,硕士研究生,主要研究方向为新能源与储能应用技术。
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孙东伟(2000—),男,福建省泉州市人,硕士研究生,主要研究方向为新能源与储能应用技术。
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所提虚拟惯量限流方法流程, figureFileSmall=an+9Wliw6DY4Nv7TWA4zEA==, figureFileBig=yrwtJCUGpyp+VZgDFND/9g==, tableContent=null), ArticleFig(id=1218290868293915111, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1202649045530538135, language=EN, label=null, caption=null, figureFileSmall=rP4JK8En5Fmt7QYhppMG6Q==, figureFileBig=FS1xJpfW/BKXuHgdkQXq1w==, tableContent=null), ArticleFig(id=1218290868381995501, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1202649045530538135, language=CN, label=图6, caption=
无附加控制时GFC暂态响应过程, figureFileSmall=rP4JK8En5Fmt7QYhppMG6Q==, figureFileBig=FS1xJpfW/BKXuHgdkQXq1w==, tableContent=null), ArticleFig(id=1218290868470075887, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1202649045530538135, language=EN, label=null, caption=null, figureFileSmall=J1fRXIKFwEUWwSgF9qr2FA==, figureFileBig=BtT424e2zMADdzQ5iYlwyg==, tableContent=null), ArticleFig(id=1218290868566544880, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1202649045530538135, language=CN, label=图7, caption=
引入所提虚拟惯量限流方法时GFC仿真结果, figureFileSmall=J1fRXIKFwEUWwSgF9qr2FA==, figureFileBig=BtT424e2zMADdzQ5iYlwyg==, tableContent=null), ArticleFig(id=1218290868658819576, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1202649045530538135, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 数值 |
| 直流电压Udc/V | 800 |
| 额定电压幅值Un/V | 311 |
| 电网电压幅值Ug/V | 311 |
| 额定角频率ωn/(rad/s) | 100π |
| 有功功率参考值Pref/kW | 60 |
| 无功功率参考值Qref/kvar | 0 |
| 线路电感Lg/mH | 2.5 |
| 滤波电感Lf/mH | 1 |
| 滤波电阻Rf/Ω | 0.6 |
| 滤波电容Cf/μF | 200 |
| 虚拟惯量初始值J0/(kg•m2) | 1 |
| 阻尼系数D/(N•m•s/rad) | 40 |
| 无功-电压下垂系数kq | 3×10-5 |
), ArticleFig(id=1218290868742705659, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1202649045530538135, language=CN, label=表1, caption=
主要仿真参数
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| 参数 | 数值 |
| 直流电压Udc/V | 800 |
| 额定电压幅值Un/V | 311 |
| 电网电压幅值Ug/V | 311 |
| 额定角频率ωn/(rad/s) | 100π |
| 有功功率参考值Pref/kW | 60 |
| 无功功率参考值Qref/kvar | 0 |
| 线路电感Lg/mH | 2.5 |
| 滤波电感Lf/mH | 1 |
| 滤波电阻Rf/Ω | 0.6 |
| 滤波电容Cf/μF | 200 |
| 虚拟惯量初始值J0/(kg•m2) | 1 |
| 阻尼系数D/(N•m•s/rad) | 40 |
| 无功-电压下垂系数kq | 3×10-5 |
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| 方法 | 最大电流 幅值/p.u. | 故障 清除角/(°) | 系统状态 |
| 无附加控制 | 2.08 | 41.1 | 同步稳定 |
| 电流限幅 | 1.80 | 71.2 | 失去同步 |
| 虚拟惯量限流 | 1.76 | 25.9 | 同步稳定 |
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电压跌落故障持续0.8s的仿真结果
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| 方法 | 最大电流 幅值/p.u. | 故障 清除角/(°) | 系统状态 |
| 无附加控制 | 2.08 | 41.1 | 同步稳定 |
| 电流限幅 | 1.80 | 71.2 | 失去同步 |
| 虚拟惯量限流 | 1.76 | 25.9 | 同步稳定 |
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