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Dynamic interactions of DC and AC grids subject to DC faults

Li, Gen, Liang, Jun, Ugalde Loo, Carlos, 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: 28 Jun 2019 14:57

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