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Title
Japanese: 
English:Reconfiguration of Bipolar HVDC System for Continuous Transmission under DC Line Fault 
Author
Japanese: 榎本光芳, 佐野憲一朗, 菅野純弥, 福嶋純一.  
English: Mitsuyoshi Enomoto, Kenichiro Sano, Junya Kanno, Junichi Fukushima.  
Language English 
Journal/Book name
Japanese: 
English:IEEE Transactions on Power Electronics 
Volume, Number, Page        
Published date Mar. 2024 
Publisher
Japanese: 
English:IEEE 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL https://doi.org/10.1109/TPEL.2024.3381218
 
DOI https://doi.org/10.1109/TPEL.2024.3381218
Abstract This article proposes a reconfiguration method for the bipolar high voltage dc transmission (HVDC) system connecting offshore wind power plants (WPPs). Conventional bipolar HVDC systems can continue to transmit half the rated power even if a dc fault occurs at one of the two poles. However, the shutdown of half of the entire WPPs is inevitable because WPPs cannot continue operations on their own. Once the WPPs are shut down, they take a long time to restart. The power transmission decreases during the time and it imposes a negative effect on the onshore ac system. The proposed reconfiguration method immediately removes the dc fault and relocates the converters and WPPs from the faulted pole to the healthy pole by disconnecting switches. Furthermore, the reconfiguration is designed based on the fault ride-through (FRT) capability of the WPPs specified by the existing grid code. As a result, the reconfiguration realizes the continuous operation of the entire WPPs even if a dc line fault occurs. Therefore, the proposed method can improve the supply reliability. The validity of the proposed method is verified by electromagnetic transient (EMT) simulations.

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