Research on Saturated Iron-Core Superconductive Fault Current Limiters Applied in VSC-HVDC Systems

The high-voltage direct-current transmission based on voltage source converter (VSC-HVDC) system has pointed the way for the development of the smart grid, yet one challenge to be faced is that VSCs are vulnerable to dc short-circuit faults due to the huge discharge current of the dc-link capacitor....

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2016-10, Vol.26 (7), p.1-5
Main Authors: Li, Botong, Jing, Fangjie, Jia, JianFei, Li, Bin
Format: Article
Language:English
Subjects:
Circuit faults
Coils
Fault analysis
Fault currents
inter-pole short-circuit fault
Magnetic cores
Power conversion
superconductive fault current limiter
Superconductivity
VSC-HVDC
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Summary:The high-voltage direct-current transmission based on voltage source converter (VSC-HVDC) system has pointed the way for the development of the smart grid, yet one challenge to be faced is that VSCs are vulnerable to dc short-circuit faults due to the huge discharge current of the dc-link capacitor. Therefore, the saturated iron-core superconductive fault current limiter (SI-SFCL) is introduced to limit the fault current to a relatively low level. The working principle and electrical properties of the SI-SFCL are discussed first. The relationship between the inductance and dc gird current of the SI-SFCL is deduced. The transient process of a short-circuit fault in the VSC-HVDC system with the SI-SFCL is studied. The maximum current and the drop velocity of dc rail voltage are presented according to the parameter of the SI-SFCL. The effectiveness of the SI-SFCL is proved by comparing fault currents and voltages of the VSC-HVDC system with and without it in PSPICE.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2016.2601649