Coordinated reactive power control for hybrid cascaded high‐voltage direct‐current links in weak AC grids
Abstract The hybrid cascaded high‐voltage direct‐current (HC‐HVDC) links are recently introduced for ultra‐high voltage bulky power transmissions. However, as wind power becomes more prevalent, the grid is gradually weakened and will face voltage stability issues. This paper proposes a coordinated r...
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| Format: | Article |
| Language: | English |
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Wiley
2024-12-01
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| Series: | IET Generation, Transmission & Distribution |
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| Online Access: | https://doi.org/10.1049/gtd2.13143 |
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| author | Xiaojie Fan Yongning Chi Zhibing Wang |
| author_facet | Xiaojie Fan Yongning Chi Zhibing Wang |
| author_sort | Xiaojie Fan |
| collection | DOAJ |
| description | Abstract The hybrid cascaded high‐voltage direct‐current (HC‐HVDC) links are recently introduced for ultra‐high voltage bulky power transmissions. However, as wind power becomes more prevalent, the grid is gradually weakened and will face voltage stability issues. This paper proposes a coordinated reactive power control strategy for HC‐HVDC links to enhance the voltage stability of AC bus. Firstly, the impact of HC‐HVDC on the static voltage stability of the AC bus is studied by the voltage sensitivity coefficient. Then, the limitation of reactive power capability of modular multilevel converter in the HC structure is identified. Based on the analysis results, a coordinated reactive power control strategy based on adaptive voltage droop is proposed. In the strategy, the DC voltage ratio is regulated according to the fluctuation degree of the AC bus voltage to adjust the reactive power of HC‐HVDC, which realized the dynamic voltage support for the AC bus. Finally, electromagnetic simulations in power systems computer aided design (PSCAD)/electromagnetic transients including DC (EMTDC) are performed, and the results validate the theoretical findings and the effectiveness of the control strategy. |
| format | Article |
| id | doaj-art-39663ddb65394d92b129dc8ec127bbd9 |
| institution | DOAJ |
| issn | 1751-8687 1751-8695 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Wiley |
| record_format | Article |
| series | IET Generation, Transmission & Distribution |
| spelling | doaj-art-39663ddb65394d92b129dc8ec127bbd92025-08-20T02:48:51ZengWileyIET Generation, Transmission & Distribution1751-86871751-86952024-12-0118233788380010.1049/gtd2.13143Coordinated reactive power control for hybrid cascaded high‐voltage direct‐current links in weak AC gridsXiaojie Fan0Yongning Chi1Zhibing Wang2China Electric Power Research Institute Beijing ChinaChina Electric Power Research Institute Beijing ChinaChina Electric Power Research Institute Beijing ChinaAbstract The hybrid cascaded high‐voltage direct‐current (HC‐HVDC) links are recently introduced for ultra‐high voltage bulky power transmissions. However, as wind power becomes more prevalent, the grid is gradually weakened and will face voltage stability issues. This paper proposes a coordinated reactive power control strategy for HC‐HVDC links to enhance the voltage stability of AC bus. Firstly, the impact of HC‐HVDC on the static voltage stability of the AC bus is studied by the voltage sensitivity coefficient. Then, the limitation of reactive power capability of modular multilevel converter in the HC structure is identified. Based on the analysis results, a coordinated reactive power control strategy based on adaptive voltage droop is proposed. In the strategy, the DC voltage ratio is regulated according to the fluctuation degree of the AC bus voltage to adjust the reactive power of HC‐HVDC, which realized the dynamic voltage support for the AC bus. Finally, electromagnetic simulations in power systems computer aided design (PSCAD)/electromagnetic transients including DC (EMTDC) are performed, and the results validate the theoretical findings and the effectiveness of the control strategy.https://doi.org/10.1049/gtd2.13143HVDC power transmissionreactive power controlvoltage controlwind power |
| spellingShingle | Xiaojie Fan Yongning Chi Zhibing Wang Coordinated reactive power control for hybrid cascaded high‐voltage direct‐current links in weak AC grids IET Generation, Transmission & Distribution HVDC power transmission reactive power control voltage control wind power |
| title | Coordinated reactive power control for hybrid cascaded high‐voltage direct‐current links in weak AC grids |
| title_full | Coordinated reactive power control for hybrid cascaded high‐voltage direct‐current links in weak AC grids |
| title_fullStr | Coordinated reactive power control for hybrid cascaded high‐voltage direct‐current links in weak AC grids |
| title_full_unstemmed | Coordinated reactive power control for hybrid cascaded high‐voltage direct‐current links in weak AC grids |
| title_short | Coordinated reactive power control for hybrid cascaded high‐voltage direct‐current links in weak AC grids |
| title_sort | coordinated reactive power control for hybrid cascaded high voltage direct current links in weak ac grids |
| topic | HVDC power transmission reactive power control voltage control wind power |
| url | https://doi.org/10.1049/gtd2.13143 |
| work_keys_str_mv | AT xiaojiefan coordinatedreactivepowercontrolforhybridcascadedhighvoltagedirectcurrentlinksinweakacgrids AT yongningchi coordinatedreactivepowercontrolforhybridcascadedhighvoltagedirectcurrentlinksinweakacgrids AT zhibingwang coordinatedreactivepowercontrolforhybridcascadedhighvoltagedirectcurrentlinksinweakacgrids |