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Energies 2015, 8(6), 4839-4852; doi:10.3390/en8064839

Protection Principle for a DC Distribution System with a Resistive Superconductive Fault Current Limiter

The Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China
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Author to whom correspondence should be addressed.
Academic Editor: Paul Stewart
Received: 13 February 2015 / Accepted: 14 May 2015 / Published: 26 May 2015
(This article belongs to the Special Issue Electrical Power and Energy Systems for Transportation Applications)
View Full-Text   |   Download PDF [802 KB, uploaded 26 May 2015]   |  

Abstract

A DC distribution system, which is suitable for access to distributed power generation and DC loads, is one of the development directions in power systems. Furthermore, it could greatly improve the energy efficiency and reduce the loss of power transportation. The huge short circuit current is always a great threat to the safety of the components, especially the capacitors and diodes. A resistive superconductive fault current limiter (SFCL), which could respond quickly once a fault happens and limit the fault current to a relatively low level, becomes a good solution to this problem. In this paper, the operational principle of the resistive SFCL is introduced first, and then, the DC short-circuit fault characteristic of the DC distribution system with the SFCL is analyzed and the effectiveness of the SFCL verified. In order to realize the selectivity of the protection in the DC distribution system with SFCL, a new transient current protection principle based on Ip (the peak value of the current) and tp (the transient time that the current takes to reach its peak value) is proposed. Finally, a model of a 10-kV DC distribution system with an SFCL is established and simulated in PSCAD/METDC. Simulation results have demonstrated the validity of the analysis and protection principle. View Full-Text
Keywords: DC distribution system; relay protection; resistive superconductive fault current limiter; transient current DC distribution system; relay protection; resistive superconductive fault current limiter; transient current
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Xue, S.; Gao, F.; Sun, W.; Li, B. Protection Principle for a DC Distribution System with a Resistive Superconductive Fault Current Limiter. Energies 2015, 8, 4839-4852.

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