Protection Scheme of a Last Mile Active LVDC Distribution Network with Reclosing Option

Saeed Zaman Jamali, Syed Basit Ali Bukhari, Muhammad Omer Khan, Muhammad Mehdi, Chul-Ho Noh, Gi-Hyeon Gwon and Chul-Hwan Kim
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Saeed Zaman Jamali: College of Information and Communication Engineering, Sungkyunkwan University, Suwon 16419, Korea
Syed Basit Ali Bukhari: College of Information and Communication Engineering, Sungkyunkwan University, Suwon 16419, Korea
Muhammad Omer Khan: College of Information and Communication Engineering, Sungkyunkwan University, Suwon 16419, Korea
Muhammad Mehdi: College of Information and Communication Engineering, Sungkyunkwan University, Suwon 16419, Korea
Chul-Ho Noh: College of Information and Communication Engineering, Sungkyunkwan University, Suwon 16419, Korea
Gi-Hyeon Gwon: College of Information and Communication Engineering, Sungkyunkwan University, Suwon 16419, Korea
Chul-Hwan Kim: College of Information and Communication Engineering, Sungkyunkwan University, Suwon 16419, Korea

Energies, 2018, vol. 11, issue 5, 1-20

Abstract: A low voltage direct current (LVDC) distribution network is a promising technology to meet the standards of future energy demands for smart loads. An LVDC distribution network can not only supply efficient, smooth and clean energy, but also makes the integration of renewable energy resources in the distribution system easy. A major obstacle in the implementation of the LVDC distribution network is the protection of the network during abnormal grid conditions, such as transients and faults. This paper analyzes DC fault characteristics considering an LVDC distribution network, highlights the worst case scenario during a fault and protection related issues and proposes the protection schemes for the LVDC network. In the proposed protection scheme, a fault is detected and located through superimposed components. To minimize the effect of the DC fault on the distribution network, distributed fault current limiters are introduced and the final decision to disconnect or reconnect the affected line is made on the basis of the type of fault. In addition, a reclosing scheme for a temporary fault is proposed to avoid high inrush currents and false tripping, which eventually increases the reliability. A fast communication-based backup protection is also suggested, and to reduce dependency, a secondary backup is used in the case of communication delay or failure. The proposed scheme is verified using the modified IEEE 13 node test system, which is implemented in ATPDraw. The results show that the proposed scheme can successfully detect, locate and limit a DC fault in an LVDC distribution network with different fault resistances or locations. Moreover, the network is restored successfully in the case of temporary faults.

Keywords: LVDC protection; DC fault detection and location; superimposed components; distributed fault current limiter; ATPDraw (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: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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