Novel fault current‐limiting scheme for MMC‐based flexible HVDC system. Issue 16 (13th February 2019)

• Record Type: Journal Article
• Authors: Ma, Yueyang; Zou, Guibin; Song, Shenglan; Guo, Jianbao; Gao, Zhanjun
• Is Part Of: Journal of engineering. Volume 2019:Issue 16(2019)
• Page Start: 2233
• Page End: 2238
• Publication Date: 2019-02-13
• Subjects: fault currents -- power overhead lines -- fault diagnosis -- power electronics -- power transmission control -- HVDC power transmission -- HVDC power convertors; MMC‐based flexible HVDC system -- flexible direct current transmission technique -- power engineering projects -- multilevel converter -- rapidly rising fault current -- high‐voltage direct current system -- symmetrical bipolar MMC–HVDC system -- serial controllable power electronics -- novel current‐limiting scheme configuration -- operation principles -- symmetric bipolar MMC–HVDC system model -- fault current‐limiting scheme; Engineering -- Periodicals; Engineering; Electronic journals; Periodicals; 620.005
• DOI: 10.1049/joe.2018.8871
• Languages: English
• ISSNs: 2051-3305

Abstract

Abstract : Currently, the flexible direct current transmission technique becomes a research focus around the world, and be applied in power engineering projects gradually. However, due to the topology of the modular multi‐level converter (MMC), a rapidly rising fault current will appear in case of the fault on the DC side, which constraints the development of MMC‐based flexible high‐voltage direct current (MMC–HVDC) system. To restraint the fault current, this paper proposes a novel fault current‐limiting scheme for symmetrical bipolar MMC–HVDC system, which consists of a current‐limiting resistance and dozens of serial controllable power electronics in parallel with the current‐limiting resistance. The current‐limiting resistance is designed to reduce the fault current and the requirement for the direct current circuit breaker (DCCB) capacity. The novel current‐limiting scheme configuration and operation principles are analysed. Finally, a symmetric bipolar MMC–HVDC system model is constructed, and simulation results show the feasibility of the proposed fault current‐limiting scheme.