Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/141550
Title: Modular multilevel converter dc fault protection
Authors: Cwikowski, Oliver
Wickramasinghe, Harith R.
Konstantinou, Georgios
Pou, Josep
Barnes, Mike
Shuttleworth, Roger
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2017
Source: Cwikowski, O., Wickramasinghe, H. R., Konstantinou, G., Pou, J., Barnes, M., & Shuttleworth, R. (2018). Modular multilevel converter dc fault protection. IEEE Transactions on Power Delivery, 33(1), 291-300. doi:10.1109/TPWRD.2017.2715833
Journal: IEEE Transactions on Power Delivery
Abstract: High-voltage direct current (HVDC) grids will require the development of dc protections that provide fast fault isolation and minimize the disturbance caused to the existing ac power networks. This paper investigates how the dc fault recovery performance of a half-bridge modular multilevel converter (HB-MMC) is impacted by different dc protection design choices. An HB-MMC point-to-point HVDC system that is protected with dc circuit breakers (CBs) is simulated on a real-time digital simulator using detailed switch models of the converters and switch gear. A dc CB controller has been developed and implemented in a software-in-the-loop fashion, and has been made available free for download. A novel blocking scheme for the HB-MMC is proposed, which limits the prospective dc-side fault current, benefiting dc switch gear. A comparison of circulating current controllers shows that the standard d - q controller is likely to be unsuitable for fault studies. Finally, benchmarking shows that a 48% reduction in power-flow recovery time and a 90% reduction in the energy dissipated in the circuit breaker can be achieved, along with other benefits, depending on the protection design.
URI: https://hdl.handle.net/10356/141550
ISSN: 0885-8977
DOI: 10.1109/TPWRD.2017.2715833
Rights: © 2017 IEEE. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:EEE Journal Articles

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