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Energies 2016, 9(10), 769; doi:10.3390/en9100769

Technical Evaluation of Superconducting Fault Current Limiters Used in a Micro-Grid by Considering the Fault Characteristics of Distributed Generation, Energy Storage and Power Loads

1
School of Electrical Engineering, Wuhan University, Wuhan 430072, Hubei, China
2
State Grid Hubei Electric Power Research Institute, Wuhan 430077, Hubei, China
3
State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China
*
Author to whom correspondence should be addressed.
Academic Editor: João P. S. Catalão
Received: 26 June 2016 / Revised: 6 September 2016 / Accepted: 19 September 2016 / Published: 23 September 2016
(This article belongs to the Special Issue Distributed Renewable Generation)
View Full-Text   |   Download PDF [5785 KB, uploaded 23 September 2016]   |  

Abstract

Concerning the development of a micro-grid integrated with multiple intermittent renewable energy resources, one of the main issues is related to the improvement of its robustness against short-circuit faults. In a sense, the superconducting fault current limiter (SFCL) can be regarded as a feasible approach to enhance the transient performance of a micro-grid under fault conditions. In this paper, the fault transient analysis of a micro-grid, including distributed generation, energy storage and power loads, is conducted, and regarding the application of one or more flux-coupling-type SFCLs in the micro-grid, an integrated technical evaluation method considering current-limiting performance, bus voltage stability and device cost is proposed. In order to assess the performance of the SFCLs and verify the effectiveness of the evaluation method, different fault cases of a 10-kV micro-grid with photovoltaic (PV), wind generator and energy storage are simulated in the MATLAB software. The results show that, the efficient use of the SFCLs for the micro-grid can contribute to reducing the fault current, improving the voltage sags and suppressing the frequency fluctuations. Moreover, there will be a compromise design to fully take advantage of the SFCL parameters, and thus, the transient performance of the micro-grid can be guaranteed. View Full-Text
Keywords: distributed generation (DG); micro-grid; flux-coupling-type superconducting fault current limiter (SFCL); technical evaluation method; short-circuit fault analyses distributed generation (DG); micro-grid; flux-coupling-type superconducting fault current limiter (SFCL); technical evaluation method; short-circuit fault analyses
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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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Chen, L.; Tu, X.; Chen, H.; Yang, J.; Wu, Y.; Shu, X.; Ren, L. Technical Evaluation of Superconducting Fault Current Limiters Used in a Micro-Grid by Considering the Fault Characteristics of Distributed Generation, Energy Storage and Power Loads. Energies 2016, 9, 769.

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