Coordinated Control and Protection Strategy for Bipolar HVDC Grids Based on Improved Dual Half-Bridge Submodule MMC Using Modulus Transformation

Coordinated Control and Protection Strategy for Bipolar HVDC Grids Based on Improved Dual Half-Bridge Submodule MMC Using Modulus Transformation | Authorea try { document.documentElement.classList.add('js'); } catch (e) { } var _gaq = _gaq || []; _gaq.push(['_setAccount', 'G-8VDV14Y67G']); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); })(); Skip to main content Preprints Collections Wiley Open Research IET Open Research Ecological Society of Japan All Collections About About Authorea FAQs Contact Us Quick Search anywhere Search for preprint articles, keywords, etc. Search Search ADVANCED SEARCH SCROLL This is a preprint and has not been peer reviewed. Data may be preliminary. 15 May 2025 V1 Latest version Share on Coordinated Control and Protection Strategy for Bipolar HVDC Grids Based on Improved Dual Half-Bridge Submodule MMC Using Modulus Transformation Authors : Yuhong Wang , Chunsheng Guo , jianquan liao 0000-0002-9690-8106 [email protected] , Chengbin Hu , and Dachuan Yu Authors Info & Affiliations https://doi.org/10.22541/au.174732678.85013174/v1 Published International Journal of Circuit Theory and Applications Version of record Peer review timeline 258 views 127 downloads Contents Abstract Supplementary Material Information & Authors Metrics & Citations View Options References Figures Tables Media Share Abstract In solidly grounded bipolar high-voltage direct current (HVDC) grids, DC faults can cause rapid current surges due to the inherent coupling between poles, posing significant risks to system stability. Traditional traveling-wave protection methods, while unaffected by MMC control characteristics, face challenges in bipolar systems where pole-to-pole coupling complicates fault identification and necessitates extensive deployment of costly DC circuit breakers (DCCBs). To address these limitations, this paper proposes a hybrid MMC topology based on an improved dual half-bridge submodule (IDHSM) with self-clearing capability and coordinated control-protection (CCP) strategy. The IDHSM enables dynamic adjustment of activated submodule ratios through adaptive modulation coefficient, actively reducing DC voltage by 14.93% under 300-Ω fault resistance while maintaining arm current constraints. Compared with full bridge submodule (FBSM), this hybrid topology reduces IGBT counts per voltage level by 50%, lowering hardware costs. Due to its dual capacitor structure with a passive current path, IDHSM can block energy injection from the AC side during faults. According to the simulations on ±500 kV four-terminal HVDC grid, fault identification within 1 ms using modulus instantaneous average values, resolving protection sensitivity degradation caused by MMC-based current limiting. In addition, 30% reduction in DCCB breaking current (from 7.0 kA to 4.9 kA) through coordinated current limiting. The proposed strategy exhibits strong performance within the transition resistance range of 0.1-300 Ω. Supplementary Material File (idhsm-mmc0512.docx) Download 2.29 MB Information & Authors Information Version history V1 Version 1 15 May 2025 Peer review timeline Published International Journal of Circuit Theory and Applications Version of Record 30 Sep 2025 Published Copyright This work is licensed under a Non Exclusive No Reuse License. Keywords current limiting (cl) dc fault protection high-voltage dc (hvdc) improved dual half-bridge submodule (idhsm) modular multilevel converters (mmcs) Authors Affiliations Yuhong Wang Sichuan University College of Electrical Engineering View all articles by this author Chunsheng Guo Sichuan University College of Electrical Engineering View all articles by this author jianquan liao 0000-0002-9690-8106 [email protected] Sichuan University College of Electrical Engineering View all articles by this author Chengbin Hu Sichuan University College of Electrical Engineering View all articles by this author Dachuan Yu Qingdao University of Science and Technology View all articles by this author Metrics & Citations Metrics Article Usage 258 views 127 downloads .FvxKWukQNSOunydq8rnd { width: 100px; } Citations Download citation Yuhong Wang, Chunsheng Guo, jianquan liao, et al. Coordinated Control and Protection Strategy for Bipolar HVDC Grids Based on Improved Dual Half-Bridge Submodule MMC Using Modulus Transformation. Authorea . 15 May 2025. DOI: https://doi.org/10.22541/au.174732678.85013174/v1 If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download. For more information or tips please see 'Downloading to a citation manager' in the Help menu . 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