Protection strategy for multi‐terminal high‐voltage direct current grids using SFCLs at converter station output. Issue 15 (11th September 2018)

• Record Type: Journal Article
• Authors: Leon Garcia, William Ricardo; Bertinato, Alberto; Tixador, Pascal; Raison, Bertrand; Luscan, Bruno
• Is Part Of: Journal of engineering. Volume 2018:Issue 15(2018)
• Page Start: 1369
• Page End: 1374
• Publication Date: 2018-09-11
• Subjects: fault currents -- fault current limiters -- circuit breakers -- HVDC power transmission -- superconducting fault current limiters -- EMTP -- HVDC power convertors -- power grids; fault clearing strategy -- half‐bridge modular multilevel converters -- three‐terminal bipolar HVDC grid -- protection schemes -- DC grid -- energy dissipation requirements -- breaking capability -- fault current interruption -- mechanical DC circuit breakers -- fault clearing time constraint -- DC fault -- AC grid -- current contribution -- AC/DC converters -- resistive‐type superconducting fault current limiters -- multiterminal high voltage direct current grids -- nonselective protection strategy -- converter station output -- SFCLs -- high‐voltage direct current grids; Engineering -- Periodicals; Engineering; Electronic journals; Periodicals; 620.005
• DOI: 10.1049/joe.2018.0224
• Languages: English
• ISSNs: 2051-3305

Abstract

Abstract : This study proposes a non‐selective protection strategy for multi‐terminal high voltage direct current grids based on resistive‐type superconducting fault current limiters (SFCLs). Located at the output of AC/DC converters, the SFCL limits the current contribution from the AC grid in case of DC fault. With this approach, the fault clearing time constraint is relieved allowing the use of mechanical DC circuit breakers for fault current interruption. Furthermore, the breaking capability and energy dissipation requirements of the breaker are greatly reduced. To achieve a fast restoration of the DC grid, a redundant SFCL is introduced in parallel to those in operation, bypassing them when the fault is effectively suppressed. In addition, primary and back‐up protection schemes are described and tested using a three‐terminal bipolar high voltage direct current (HVDC) grid based on half‐bridge modular multilevel converters and cable transmission. Simulations are implemented in EMTP‐RV ® to analyse and discuss performances of the proposed fault clearing strategy.