Topology and Control Strategy of PV MVDC Grid-Connected Converter with LVRT Capability
This paper proposes an isolated buck-boost topology and control strategy for the photovoltaic (PV) medium-voltage DC (MVDC) converter with low-voltage ride through (LVRT) capability. The proposed isolated buck-boost topology operates on either boost or buck mode by only controlling the active semico...
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| Format: | Article |
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MDPI AG
2021-03-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/6/2739 |
| _version_ | 1797540866442657792 |
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| author | Huan Wang Yu Zhou Xinke Huang Yibo Wang Honghua Xu |
| author_facet | Huan Wang Yu Zhou Xinke Huang Yibo Wang Honghua Xu |
| author_sort | Huan Wang |
| collection | DOAJ |
| description | This paper proposes an isolated buck-boost topology and control strategy for the photovoltaic (PV) medium-voltage DC (MVDC) converter with low-voltage ride through (LVRT) capability. The proposed isolated buck-boost topology operates on either boost or buck mode by only controlling the active semiconductors on the low-voltage side. Based on this topology, medium-voltage (MV) dc–dc module is able to be developed to reduce the number of modules and increase the power density in the converter, which corresponds to the first contribution. As another contribution, a LVRT method based on an LC filter for MVDC converter is proposed without additional circuit and a feedback capacitor current control method for the isolated buck-boost converter is proposed to solve the instability problem caused by the resonance spike of the LC filter. Five kV/50 kW SiC-based dc–dc modules and ±10 kV/200 kW PV MVDC converters were developed. Experiments of the converter for MVDC system in the normal and LVRT conditions are presented. The experimental results verify the effectiveness of the proposed topology and control strategy. |
| first_indexed | 2024-03-10T13:07:08Z |
| format | Article |
| id | doaj.art-c52ec8fa44a04697aa90d3dfc4c06ce1 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T13:07:08Z |
| publishDate | 2021-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-c52ec8fa44a04697aa90d3dfc4c06ce12023-11-21T11:04:27ZengMDPI AGApplied Sciences2076-34172021-03-01116273910.3390/app11062739Topology and Control Strategy of PV MVDC Grid-Connected Converter with LVRT CapabilityHuan Wang0Yu Zhou1Xinke Huang2Yibo Wang3Honghua Xu4Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, ChinaThis paper proposes an isolated buck-boost topology and control strategy for the photovoltaic (PV) medium-voltage DC (MVDC) converter with low-voltage ride through (LVRT) capability. The proposed isolated buck-boost topology operates on either boost or buck mode by only controlling the active semiconductors on the low-voltage side. Based on this topology, medium-voltage (MV) dc–dc module is able to be developed to reduce the number of modules and increase the power density in the converter, which corresponds to the first contribution. As another contribution, a LVRT method based on an LC filter for MVDC converter is proposed without additional circuit and a feedback capacitor current control method for the isolated buck-boost converter is proposed to solve the instability problem caused by the resonance spike of the LC filter. Five kV/50 kW SiC-based dc–dc modules and ±10 kV/200 kW PV MVDC converters were developed. Experiments of the converter for MVDC system in the normal and LVRT conditions are presented. The experimental results verify the effectiveness of the proposed topology and control strategy.https://www.mdpi.com/2076-3417/11/6/2739MVDCconverterdc–dcLVRTcurrent control |
| spellingShingle | Huan Wang Yu Zhou Xinke Huang Yibo Wang Honghua Xu Topology and Control Strategy of PV MVDC Grid-Connected Converter with LVRT Capability Applied Sciences MVDC converter dc–dc LVRT current control |
| title | Topology and Control Strategy of PV MVDC Grid-Connected Converter with LVRT Capability |
| title_full | Topology and Control Strategy of PV MVDC Grid-Connected Converter with LVRT Capability |
| title_fullStr | Topology and Control Strategy of PV MVDC Grid-Connected Converter with LVRT Capability |
| title_full_unstemmed | Topology and Control Strategy of PV MVDC Grid-Connected Converter with LVRT Capability |
| title_short | Topology and Control Strategy of PV MVDC Grid-Connected Converter with LVRT Capability |
| title_sort | topology and control strategy of pv mvdc grid connected converter with lvrt capability |
| topic | MVDC converter dc–dc LVRT current control |
| url | https://www.mdpi.com/2076-3417/11/6/2739 |
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