Responsibility Division for Harmonic Instability in the Multi-Paralleled Grid-Connected Inverters System Based on Impedance Analysis
In the multi-paralleled grid-connected inverters system, harmonic oscillations may be deteriorated or even lead to system instability by the coupling between the inverters and the grid impedance. This paper presents a quantify method to determine which inverters contribute more to the harmonic insta...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IEEE
2023-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/10286037/ |
| _version_ | 1827783687765229568 |
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| author | Chengbi Zeng Xuefeng Wu Hong Miao Haoxiang Duan |
| author_facet | Chengbi Zeng Xuefeng Wu Hong Miao Haoxiang Duan |
| author_sort | Chengbi Zeng |
| collection | DOAJ |
| description | In the multi-paralleled grid-connected inverters system, harmonic oscillations may be deteriorated or even lead to system instability by the coupling between the inverters and the grid impedance. This paper presents a quantify method to determine which inverters contribute more to the harmonic instability so that the corresponding inverters can be removed quickly or targeted oscillation suppression measures can be taken to restore the system to stable operation. In the method, a contribution factor (CF <inline-formula> <tex-math notation="LaTeX">$_{\mathrm {i}}$ </tex-math></inline-formula>) is defined which can quantitatively represent the responsibility of each inverter to system instability. The CFi are calculated by analyzing the variation of system stability margin after different inverters are removed based on the bode diagram, therefore, according to the corresponding CFi, which inverters have a significant impact on harmonic instability can be determined under different grid impedances. Besides used in the parallel system with different types of inverters (PSDI), the CFi can also be used for the parallel system with identical inverters (PSII) to determine the number of inverters that need to be removed to restore the system to stable operation. The reasonableness and effectiveness of the proposed method are verified by simulation results. |
| first_indexed | 2024-03-11T15:50:58Z |
| format | Article |
| id | doaj.art-6fe61747cbd44324b56555acb37bbb00 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-03-11T15:50:58Z |
| publishDate | 2023-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-6fe61747cbd44324b56555acb37bbb002023-10-25T23:00:34ZengIEEEIEEE Access2169-35362023-01-011111545011546110.1109/ACCESS.2023.332481510286037Responsibility Division for Harmonic Instability in the Multi-Paralleled Grid-Connected Inverters System Based on Impedance AnalysisChengbi Zeng0https://orcid.org/0000-0001-6238-9507Xuefeng Wu1https://orcid.org/0009-0004-7109-8575Hong Miao2https://orcid.org/0000-0002-5874-5908Haoxiang Duan3College of Electrical Engineering, Sichuan University, Chengdu, ChinaCollege of Electrical Engineering, Sichuan University, Chengdu, ChinaCollege of Electrical Engineering, Sichuan University, Chengdu, ChinaChengdu Rail Transit Group Company Ltd., Chengdu, ChinaIn the multi-paralleled grid-connected inverters system, harmonic oscillations may be deteriorated or even lead to system instability by the coupling between the inverters and the grid impedance. This paper presents a quantify method to determine which inverters contribute more to the harmonic instability so that the corresponding inverters can be removed quickly or targeted oscillation suppression measures can be taken to restore the system to stable operation. In the method, a contribution factor (CF <inline-formula> <tex-math notation="LaTeX">$_{\mathrm {i}}$ </tex-math></inline-formula>) is defined which can quantitatively represent the responsibility of each inverter to system instability. The CFi are calculated by analyzing the variation of system stability margin after different inverters are removed based on the bode diagram, therefore, according to the corresponding CFi, which inverters have a significant impact on harmonic instability can be determined under different grid impedances. Besides used in the parallel system with different types of inverters (PSDI), the CFi can also be used for the parallel system with identical inverters (PSII) to determine the number of inverters that need to be removed to restore the system to stable operation. The reasonableness and effectiveness of the proposed method are verified by simulation results.https://ieeexplore.ieee.org/document/10286037/Grid-connected invertersresponsibility divisionstability analysisweak gridharmonic oscillations |
| spellingShingle | Chengbi Zeng Xuefeng Wu Hong Miao Haoxiang Duan Responsibility Division for Harmonic Instability in the Multi-Paralleled Grid-Connected Inverters System Based on Impedance Analysis IEEE Access Grid-connected inverters responsibility division stability analysis weak grid harmonic oscillations |
| title | Responsibility Division for Harmonic Instability in the Multi-Paralleled Grid-Connected Inverters System Based on Impedance Analysis |
| title_full | Responsibility Division for Harmonic Instability in the Multi-Paralleled Grid-Connected Inverters System Based on Impedance Analysis |
| title_fullStr | Responsibility Division for Harmonic Instability in the Multi-Paralleled Grid-Connected Inverters System Based on Impedance Analysis |
| title_full_unstemmed | Responsibility Division for Harmonic Instability in the Multi-Paralleled Grid-Connected Inverters System Based on Impedance Analysis |
| title_short | Responsibility Division for Harmonic Instability in the Multi-Paralleled Grid-Connected Inverters System Based on Impedance Analysis |
| title_sort | responsibility division for harmonic instability in the multi paralleled grid connected inverters system based on impedance analysis |
| topic | Grid-connected inverters responsibility division stability analysis weak grid harmonic oscillations |
| url | https://ieeexplore.ieee.org/document/10286037/ |
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