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

Shimin Xue, Feng Gao, Wenpeng Sun and Botong Li
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Shimin Xue: The Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China
Feng Gao: The Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China
Wenpeng Sun: The Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China
Botong Li: The Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China

Energies, 2015, vol. 8, issue 6, 1-14

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 I p (the peak value of the current) and t p (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.

Keywords: DC distribution system; relay protection; resistive superconductive fault current limiter; transient current (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2015
References: View complete reference list from CitEc
Citations: View citations in EconPapers (11)

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