Self-Measurement of Three-Phase Converter Impedance With Virtual Excitation Source
With the massive deployment of converter-based power generation, low-frequency oscillations (LFOs) such as sub-synchronous oscillations (SSOs) caused by converter-grid interactions have garnered widespread attention. Accurate field-measurement of low-frequency impedance for grid-connected converters...
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| Format: | Article |
| Language: | English |
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IEEE
2025-01-01
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| Series: | IEEE Open Journal of Power Electronics |
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| Online Access: | https://ieeexplore.ieee.org/document/10978067/ |
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| author | Han Mu Zheran Zeng Dongsheng Yang Yin Sun Xiongfei Wang |
| author_facet | Han Mu Zheran Zeng Dongsheng Yang Yin Sun Xiongfei Wang |
| author_sort | Han Mu |
| collection | DOAJ |
| description | With the massive deployment of converter-based power generation, low-frequency oscillations (LFOs) such as sub-synchronous oscillations (SSOs) caused by converter-grid interactions have garnered widespread attention. Accurate field-measurement of low-frequency impedance for grid-connected converters is essential for the stability assessment. However, it is challenging for high-voltage and power converter systems, due to the high cost of impedance measurement equipment. To address the issue, a three-step equivalent transformation of the external voltage excitation source to a virtual excitation source is proposed, which facilitates imposing the excitation signals directly into the control system of the converter under test. Such equivalence is mathematically proven, demonstrating that the virtual excitation source can ensure an accurate self-measurement of the low-frequency impedance of grid-connected converters. Further, the impacts of filter parameter shifts and the side-band harmonics of switching modulation on the impedance measurement accuracy are analyzed in detail. Finally, the effectiveness of the virtual excitation source injection method is validated through experimental tests. |
| format | Article |
| id | doaj-art-cdb6c1aa3582496eaab97dc278ac5c3a |
| institution | DOAJ |
| issn | 2644-1314 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Open Journal of Power Electronics |
| spelling | doaj-art-cdb6c1aa3582496eaab97dc278ac5c3a2025-08-20T03:05:45ZengIEEEIEEE Open Journal of Power Electronics2644-13142025-01-01691993010.1109/OJPEL.2025.356467810978067Self-Measurement of Three-Phase Converter Impedance With Virtual Excitation SourceHan Mu0https://orcid.org/0000-0002-9307-4257Zheran Zeng1https://orcid.org/0009-0006-6684-6916Dongsheng Yang2https://orcid.org/0000-0002-1808-1908Yin Sun3Xiongfei Wang4https://orcid.org/0000-0002-6327-9729Department of Electrical Engineering, Eindhoven University of Technology, Eindhoven, AP, The NetherlandsDepartment of Electrical Engineering, Eindhoven University of Technology, Eindhoven, AP, The NetherlandsDepartment of Electrical Engineering, Eindhoven University of Technology, Eindhoven, AP, The NetherlandsGrid Connection Technology, Shell Global Solutions International BV, Den Haag, HP, The NetherlandsSchool of Electrical Engineering and Computer Science, KTH Royal Institute of Technology, Stockholm, SwedenWith the massive deployment of converter-based power generation, low-frequency oscillations (LFOs) such as sub-synchronous oscillations (SSOs) caused by converter-grid interactions have garnered widespread attention. Accurate field-measurement of low-frequency impedance for grid-connected converters is essential for the stability assessment. However, it is challenging for high-voltage and power converter systems, due to the high cost of impedance measurement equipment. To address the issue, a three-step equivalent transformation of the external voltage excitation source to a virtual excitation source is proposed, which facilitates imposing the excitation signals directly into the control system of the converter under test. Such equivalence is mathematically proven, demonstrating that the virtual excitation source can ensure an accurate self-measurement of the low-frequency impedance of grid-connected converters. Further, the impacts of filter parameter shifts and the side-band harmonics of switching modulation on the impedance measurement accuracy are analyzed in detail. Finally, the effectiveness of the virtual excitation source injection method is validated through experimental tests.https://ieeexplore.ieee.org/document/10978067/Grid-connected converterhigh-voltage and -power levelsdq framelow-frequencyself-measurement |
| spellingShingle | Han Mu Zheran Zeng Dongsheng Yang Yin Sun Xiongfei Wang Self-Measurement of Three-Phase Converter Impedance With Virtual Excitation Source IEEE Open Journal of Power Electronics Grid-connected converter high-voltage and -power levels dq frame low-frequency self-measurement |
| title | Self-Measurement of Three-Phase Converter Impedance With Virtual Excitation Source |
| title_full | Self-Measurement of Three-Phase Converter Impedance With Virtual Excitation Source |
| title_fullStr | Self-Measurement of Three-Phase Converter Impedance With Virtual Excitation Source |
| title_full_unstemmed | Self-Measurement of Three-Phase Converter Impedance With Virtual Excitation Source |
| title_short | Self-Measurement of Three-Phase Converter Impedance With Virtual Excitation Source |
| title_sort | self measurement of three phase converter impedance with virtual excitation source |
| topic | Grid-connected converter high-voltage and -power levels dq frame low-frequency self-measurement |
| url | https://ieeexplore.ieee.org/document/10978067/ |
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