Design of PV MVDC Converter with Wide Output Voltage Range for Series DC System
This paper presents a topology of PV MVDC converter with wide output voltage range for a series DC system and its control strategy. In the series DC system, the PV MVDC converters are input-independent, and their outputs are series-connected. A high-level system voltage is achieved for power collect...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-03-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/14/6/1617 |
| _version_ | 1827697719167156224 |
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| author | Huan Wang Junlong Lu Xinke Huang Yibo Wang Honghua Xu |
| author_facet | Huan Wang Junlong Lu Xinke Huang Yibo Wang Honghua Xu |
| author_sort | Huan Wang |
| collection | DOAJ |
| description | This paper presents a topology of PV MVDC converter with wide output voltage range for a series DC system and its control strategy. In the series DC system, the PV MVDC converters are input-independent, and their outputs are series-connected. A high-level system voltage is achieved for power collection and transmission. This series boost system is flexible and very suitable for decentralized renewable energy application. A modular topology is present for the MVDC converter to improve its applicability. A reconfigurable topology and its modulation method are proposed for the module of the converter. By regulating of duty cycle of switches, the module can be reconfigured to step-up or step-down mode. The operating principles and theoretical derivations of the reconfigurable topology are discussed in detail in this paper. Multimode control strategy for the converter is designed to adapt to complex operation conditions in a series DC system. With the proposed topology and control strategy, the series-connected PV MVDC converter achieves wide input and output voltage range to adapt to the operating characteristics of the series DC system; 3 kV/80 kW DC–DC module and 20 kV/500 kW PV MVDC converter are developed and operating stably in practice. The operation results are presented in the paper. |
| first_indexed | 2024-03-10T13:14:48Z |
| format | Article |
| id | doaj.art-b0b71ee29c794f0aa7feb4505ef75171 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T13:14:48Z |
| publishDate | 2021-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-b0b71ee29c794f0aa7feb4505ef751712023-11-21T10:30:31ZengMDPI AGEnergies1996-10732021-03-01146161710.3390/en14061617Design of PV MVDC Converter with Wide Output Voltage Range for Series DC SystemHuan Wang0Junlong Lu1Xinke 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 presents a topology of PV MVDC converter with wide output voltage range for a series DC system and its control strategy. In the series DC system, the PV MVDC converters are input-independent, and their outputs are series-connected. A high-level system voltage is achieved for power collection and transmission. This series boost system is flexible and very suitable for decentralized renewable energy application. A modular topology is present for the MVDC converter to improve its applicability. A reconfigurable topology and its modulation method are proposed for the module of the converter. By regulating of duty cycle of switches, the module can be reconfigured to step-up or step-down mode. The operating principles and theoretical derivations of the reconfigurable topology are discussed in detail in this paper. Multimode control strategy for the converter is designed to adapt to complex operation conditions in a series DC system. With the proposed topology and control strategy, the series-connected PV MVDC converter achieves wide input and output voltage range to adapt to the operating characteristics of the series DC system; 3 kV/80 kW DC–DC module and 20 kV/500 kW PV MVDC converter are developed and operating stably in practice. The operation results are presented in the paper.https://www.mdpi.com/1996-1073/14/6/1617PVseriesMVDCconverter |
| spellingShingle | Huan Wang Junlong Lu Xinke Huang Yibo Wang Honghua Xu Design of PV MVDC Converter with Wide Output Voltage Range for Series DC System Energies PV series MVDC converter |
| title | Design of PV MVDC Converter with Wide Output Voltage Range for Series DC System |
| title_full | Design of PV MVDC Converter with Wide Output Voltage Range for Series DC System |
| title_fullStr | Design of PV MVDC Converter with Wide Output Voltage Range for Series DC System |
| title_full_unstemmed | Design of PV MVDC Converter with Wide Output Voltage Range for Series DC System |
| title_short | Design of PV MVDC Converter with Wide Output Voltage Range for Series DC System |
| title_sort | design of pv mvdc converter with wide output voltage range for series dc system |
| topic | PV series MVDC converter |
| url | https://www.mdpi.com/1996-1073/14/6/1617 |
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