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{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2024,8,25]],"date-time":"2024-08-25T00:08:25Z","timestamp":1724544505945},"reference-count":26,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2023,1,3]],"date-time":"2023-01-03T00:00:00Z","timestamp":1672704000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Natural Science Foundation of China","award":["61903088"]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Symmetry"],"abstract":"As an effective carrier of a new energy collection, the DC power grid has low inertia and weak damping characteristics, making it essential to limit fault current and isolate the DC system. To quickly and effectively suppress fault current, a flexible current-limiting device (FCLD) is proposed, which can realize transient fault self-recovery without circuit breaker action and permanent and quick isolation of a fault. It improves the operational ability of the DC system under an asymmetric condition. First, a rectifier provides a set-slope current to each cascade inductor, so the voltage of the inductor can be clamped. Second, a controlled current source (CCS) is applied to generate inverse flux to prevent the inductor from magnetic saturation. The protection action time of the DC circuit breaker is reformulated. Finally, by considering the synergistic action of the current-limiting device, the circuit breaker, and the transient characteristics of the DC grid fault, the protection scheme of the multi-terminal flexible DC system can be formulated. To verify the validity of the proposed flexible current-limiting device, a multi-terminal flexible DC simulation platform is established, and the faults of DC lines are simulated and analyzed.<\/jats:p>","DOI":"10.3390\/sym15010134","type":"journal-article","created":{"date-parts":[[2023,1,3]],"date-time":"2023-01-03T07:05:53Z","timestamp":1672729553000},"page":"134","source":"Crossref","is-referenced-by-count":0,"title":["Research on the Fault-Transient Characteristics of a DC Power System Considering the Cooperative Action of a Flexible Current-Limiting Device and a Circuit Breaker"],"prefix":"10.3390","volume":"15","author":[{"given":"Feng","family":"Zheng","sequence":"first","affiliation":[{"name":"College of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350100, China"}]},{"given":"Yaling","family":"Peng","sequence":"additional","affiliation":[{"name":"College of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350100, China"}]},{"given":"Weidong","family":"Wang","sequence":"additional","affiliation":[{"name":"College of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350100, China"}]},{"given":"Song","family":"Zheng","sequence":"additional","affiliation":[{"name":"College of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350100, China"}]}],"member":"1968","published-online":{"date-parts":[[2023,1,3]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"744","DOI":"10.1109\/TPWRS.2020.3020039","article-title":"Minimization of AC-DC Grid Transmission Loss and DC Voltage Deviation Using Adaptive Droop Control and Improved AC-DC Power Flow Algorithm","volume":"36","author":"Zhang","year":"2021","journal-title":"IEEE Trans. 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