Protection strategy for multi-terminal high-voltage direct current grids using SFCLs at converter station output

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 faul...

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Bibliographic Details
Published in:Journal of engineering (Stevenage, England) England), 2018-10, Vol.2018 (15), p.1369-1374
Main Authors: Leon Garcia, William Ricardo, Bertinato, Alberto, Tixador, Pascal, Raison, Bertrand, Luscan, Bruno
Format: Article
Language:English
Subjects:
AC grid
AC/DC converters
breaking capability
circuit breakers
converter station output
current contribution
DC fault
DC grid
EMTP
energy dissipation requirements
fault clearing strategy
fault clearing time constraint
fault current interruption
fault current limiters
fault currents
half‐bridge modular multilevel converters
high‐voltage direct current grids
HVDC power convertors
HVDC power transmission
mechanical DC circuit breakers
multiterminal high voltage direct current grids
nonselective protection strategy
power grids
protection schemes
resistive‐type superconducting fault current limiters
SFCLs
superconducting fault current limiters
The 14th International Conference on Developments in Power System Protection (DPSP 2018)
three‐terminal bipolar HVDC grid
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Summary: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.
ISSN:2051-3305
2051-3305
DOI:10.1049/joe.2018.0224