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Title
Japanese: 
English:AC Fault Ride-Through Method of HVDC Interconnector for Islanded AC Grid With Offshore Wind Farm and Loads 
Author
Japanese: KRNETA Nikola, 佐野 憲一朗.  
English: Nikola Krneta, Kenichiro Sano.  
Language English 
Journal/Book name
Japanese: 
English:IEEE Access 
Volume, Number, Page vol. 12        pp. 62099-62106
Published date Apr. 2024 
Publisher
Japanese: 
English:IEEE 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL https://ieeexplore.ieee.org/document/10508897
 
DOI https://doi.org/10.1109/ACCESS.2024.3394322
Abstract This paper proposes an ac fault ride-through (FRT) method for high-voltage dc (HVDC) transmission systems that serve as an interconnector between the onshore ac grid and an islanded offshore ac grid. In conventional HVDC systems for offshore wind farms FRT is realized by consuming excess power with braking resistors. However, the same method cannot be applied if the offshore ac grid includes not only wind farms but also various loads, which are being considered for integration into multipurpose interconnectors or energy islands. In this article, a novel FRT method based on voltage control for HVDC interconnectors operating with bidirectional power flow is proposed. The proposed method curtails the ac voltage formed by the offshore converter according to the converter’s dc current and voltage. The effectiveness of the proposed FRT method is established through experiments on a mini model.

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