饱和铁心型超导限流器在柔直系统中的限流特性研究

doi:10.19595/j.cnki.1000-6753.tces.L90364

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Abstract Saturated iron core superconducting fault current limiter (SI-SFCL), which utilizes the saturation characteristics of iron core, has broad application prospects in handling with short circuit fault. SI-SFCL has the advantages of fast response speed, and the superconducting coils do not quench during the whole current limiting process. However, the research of SI-SFCL mainly focuses on AC systems, and there are few studies on its application in DC system. This paper analyzes the current-limiting mechanism of SI-SFCL in modular multilevel converter based high voltage direct current (MMC-HVDC) system. Based on PSCAD/EMTDC, the current-limiting characteristics of SI-SFCL in MMC-HVDC system are studied. The results show that SI-SFCL has strong limiting effect on the peak value of the short circuit current, but cannot limit steady-state current. Finally, the influence of magnetization current on the saturation of iron core and the current limiting effect of SI-SFCL is analyzed. The principle of selecting the appropriate magnetization current is given.

Key words： Saturated iron core superconducting fault current limiter (SI-SFCL) modular multilevel converter based high voltage direct current (MMC-HVDC) DC short circuit fault iron core

Received: 09 July 2020

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	Tan Xiangyu
	Ren Li
	Tang Yuejin
	Shi Jing
	Xu Ying

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Tan Xiangyu,Ren Li,Tang Yuejin等. Study on the Current-Limiting Characteristics of Saturated Iron Core Superconducting Fault Current Limiter in MMC-HVDC System[J]. Transactions of China Electrotechnical Society, 2020, 35(zk2): 556-561.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.L90364 OR https://dgjsxb.ces-transaction.com/EN/Y2020/V35/Izk2/556

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