Low‐frequency oscillations in MMC‐MVDC systems with high PV penetration: Modelling, mechanism, and assessment
Abstract This study investigates the low‐frequency oscillations (LFOs) in MMC‐MVDC systems with high photovoltaic (PV) penetration, considering the whole operating conditions of the grid‐connected MMC, including both the inverter and rectifier modes. First, the multi‐port impedance models of convert...
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| Format: | Article |
| Language: | English |
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Wiley
2024-11-01
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| Series: | IET Power Electronics |
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| Online Access: | https://doi.org/10.1049/pel2.12768 |
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| author | Xiangyang Wu Lili He Yang Li Zhikang Shuai Ke Zhou |
| author_facet | Xiangyang Wu Lili He Yang Li Zhikang Shuai Ke Zhou |
| author_sort | Xiangyang Wu |
| collection | DOAJ |
| description | Abstract This study investigates the low‐frequency oscillations (LFOs) in MMC‐MVDC systems with high photovoltaic (PV) penetration, considering the whole operating conditions of the grid‐connected MMC, including both the inverter and rectifier modes. First, the multi‐port impedance models of converters and networks are developed, upon which a stability criterion is defined. The mechanism of LFOs is then identified using bus participation analysis and parameter sensitivity analysis. In addition, the stable zones of the dominant parameters are identified, taking into account the whole operating conditions of the grid‐connected MMC. Interestingly, a phase‐locked loop may induce LFOs in two low‐frequency ranges. Finally, the experimental results confirm the correctness of the theoretical analysis. |
| format | Article |
| id | doaj-art-8030a170dc684b0fa7daaa9142fbb0f4 |
| institution | OA Journals |
| issn | 1755-4535 1755-4543 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Wiley |
| record_format | Article |
| series | IET Power Electronics |
| spelling | doaj-art-8030a170dc684b0fa7daaa9142fbb0f42025-08-20T02:26:14ZengWileyIET Power Electronics1755-45351755-45432024-11-0117142059207110.1049/pel2.12768Low‐frequency oscillations in MMC‐MVDC systems with high PV penetration: Modelling, mechanism, and assessmentXiangyang Wu0Lili He1Yang Li2Zhikang Shuai3Ke Zhou4College of Electrical and Information EngineeringHunan UniversityChangshaChinaCollege of Electrical and Information EngineeringHunan UniversityChangshaChinaCollege of Electrical and Information EngineeringHunan UniversityChangshaChinaCollege of Electrical and Information EngineeringHunan UniversityChangshaChinaElectric Power Research InstituteGuangxi Power Grid Company Ltd.Nanning ChinaAbstract This study investigates the low‐frequency oscillations (LFOs) in MMC‐MVDC systems with high photovoltaic (PV) penetration, considering the whole operating conditions of the grid‐connected MMC, including both the inverter and rectifier modes. First, the multi‐port impedance models of converters and networks are developed, upon which a stability criterion is defined. The mechanism of LFOs is then identified using bus participation analysis and parameter sensitivity analysis. In addition, the stable zones of the dominant parameters are identified, taking into account the whole operating conditions of the grid‐connected MMC. Interestingly, a phase‐locked loop may induce LFOs in two low‐frequency ranges. Finally, the experimental results confirm the correctness of the theoretical analysis.https://doi.org/10.1049/pel2.12768AC‐DC power convertorsfrequency‐domain analysishybrid power systemsMIMO systemsphase‐locked loopsstability |
| spellingShingle | Xiangyang Wu Lili He Yang Li Zhikang Shuai Ke Zhou Low‐frequency oscillations in MMC‐MVDC systems with high PV penetration: Modelling, mechanism, and assessment IET Power Electronics AC‐DC power convertors frequency‐domain analysis hybrid power systems MIMO systems phase‐locked loops stability |
| title | Low‐frequency oscillations in MMC‐MVDC systems with high PV penetration: Modelling, mechanism, and assessment |
| title_full | Low‐frequency oscillations in MMC‐MVDC systems with high PV penetration: Modelling, mechanism, and assessment |
| title_fullStr | Low‐frequency oscillations in MMC‐MVDC systems with high PV penetration: Modelling, mechanism, and assessment |
| title_full_unstemmed | Low‐frequency oscillations in MMC‐MVDC systems with high PV penetration: Modelling, mechanism, and assessment |
| title_short | Low‐frequency oscillations in MMC‐MVDC systems with high PV penetration: Modelling, mechanism, and assessment |
| title_sort | low frequency oscillations in mmc mvdc systems with high pv penetration modelling mechanism and assessment |
| topic | AC‐DC power convertors frequency‐domain analysis hybrid power systems MIMO systems phase‐locked loops stability |
| url | https://doi.org/10.1049/pel2.12768 |
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