Fault Section Estimation in Radial LVDC Distribution System Using Wavelet Transform

Hun-Chul Seo, Gi-Hyeon Gwon and Keon-Woo Park
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Hun-Chul Seo: Department of Electrical & Electronic Engineering, Yonam Institute of Technology, Jinju-si 52821, Korea
Gi-Hyeon Gwon: Department of Smart Electrical & Electronic Engineering, Yonam Institute of Technology, Jinju-si 52821, Korea
Keon-Woo Park: Next Square, Gunpo-si 15850, Korea

Energies, 2021, vol. 14, issue 24, 1-17

Abstract: The demand for low voltage DC (LVDC) distribution systems is increasing due to the rapid development of power conversion technology, the increase of DC-based digital loads, and the expansion of DC-based distributed generation (DG). For the stable operation of the LVDC distribution system, it is necessary to develop a protection method. In this paper, the fault section is estimated using wavelet transform (WT) in LVDC distribution system. The fault section is classified into a DC line and a DC bus. The characteristics of fault current at each fault section part are analyzed in simple and actual LVDC system. Based on this analysis, the algorithm for fault section estimation is proposed using the detail component after performing WT. The results of fault section estimations are verified through various simulations using EMTP and MATLAB. The fault section estimation can be utilized in the development of protection schemes in LVDC distribution system.

Keywords: fault current; fault section estimation; LVDC distribution system; wavelet transform (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: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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