NDLI: An enhanced MMC topology with DC fault ride-through capability

Content Provider	IEEE Xplore Digital Library
Author	Xiaoqian Li Wenhua Liu Qiang Song Hong Rao Shukai Xu
Copyright Year	2013
Description	Author affiliation: Dept. of Electr. Eng., Tsinghua Univ., Beijing, China (Xiaoqian Li; Wenhua Liu; Qiang Song) \|\| Electr. Power Res. Inst. of Source Grid of China, Guangzhou, China (Hong Rao; Shukai Xu)
Abstract	High-voltage direct current system using modular multilevel converter (MMC-HVDC) is a potential candidate for grid integration of renewable energy over long distances. The dc-link fault is an issue MMC-HVDC must deal with. This paper proposed an enhanced MMC topology with dc fault ride-through capability. By using diode clamp sub-modules, the freewheeling effect of diodes is eliminated and fault currents can be very rapidly extinguished. Since the tripping of circuit breakers is avoided, MMC can immediately restart power transmission for non-permanent faults. The required rated voltage of additional semiconductors is half the conventional semiconductors, resulting in low extra cost. Simulation results using PSCAD/EMTDC have verified the validity of the proposed protection scheme.
Sponsorship	IEEE Ind. Electron. Soc.
Starting Page	6182
Ending Page	6188
File Size	426839
Page Count	7
File Format	PDF
ISBN	9781479902248
ISSN	1553572X
DOI	10.1109/IECON.2013.6700152
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-11-10
Publisher Place	Austria
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Circuit faults Semiconductor diodes Fault currents Insulated gate bipolar transistors Topology Circuit breakers Clamps system recovery Dc fault fault clearance modular multilevel converter (MMC)
Content Type	Text
Resource Type	Article

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