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Dynamic interactions of DC and AC grids subject to DC faults

Li, Gen ORCID:, Liang, Jun ORCID:, Ugalde Loo, Carlos ORCID:, Coventry, Paul and Rimez, Johan 2016. Dynamic interactions of DC and AC grids subject to DC faults. Presented at: 2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia), Hefei, China, 22-25 May 2016. Power Electronics and Motion Control Conference (IPEMC-ECCE Asia), 2016 IEEE 8th International. 10.1109/IPEMC.2016.7512712

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DC circuit breakers (DCCBs), AC circuit breakers (ACCBs) and Full-Bridge Modular Multi-Level Converters (FB-MMCs) can be used to block DC fault current in voltage source converter-based (VSC) multi-terminal high voltage direct current (MTDC) grids. However, the DC fault transient characteristics of AC/DC networks will be different depending on the type of devices used to protect the DC grid. In this paper, the DC fault clearance and post-fault restoration processes using DCCBs and ACCBs are analyzed. The transient response of the AC/DC system during DC faults is also assessed considering the analyzed approaches. The studies are conducted in PSCAD/EMTDC, where an integrated AC/DC transmission system has been modeled. Simulation results indicate that a different transient behavior arises when different fault isolation and post-fault restoration schemes are employed. The work of this paper provides an understanding of the dynamic behavior in AC/DC systems, in turn contributing to a deeper comprehension of system operation and control system design.

Item Type: Conference or Workshop Item (Paper)
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Funders: European Union FP7 Programme
Last Modified: 02 Nov 2022 09:37

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