@inproceedings{28ed7dca483a4fc0a70e19d0ae2e17f4,
title = "Non-pilot DC Fault Protection Using ROCOC in MVDC System",
abstract = "This paper proposes a non-pilot dc fault detection algorithm based on the rate of change of current (ROCOC) for a full-bridge (FB) modular multilevel converter (MMC) medium voltage dc (MVDC) distribution system. The fault current is analytically derived using an RLC equivalent model of the MMC, and the threshold is determined from the analytical equation. The algorithm detects a fault when the ROCOC exceeds the threshold and persists for five consecutive samples, without requiring communication infrastructure. Its performance was validated through MATLAB/Simulink under various fault scenarios, including variations in DC reactor size, fault resistance, and fault location. In all cases, faults were detected within 1.2 ms prior to the peak fault current.",
keywords = "DC Fault Detection, MMC, Non-pilot Protection Scheme, ROCOC Relay",
author = "Kim, \{Cheon Ho\} and Shin, \{Gwang Su\} and Jin Jeong and Kim, \{Ho Young\} and Song, \{Jin Sol\} and Kim, \{Chul Hwan\}",
note = "Publisher Copyright: {\textcopyright} 2025 IEEE.; 7th International Conference on Power and Energy Technology, ICPET 2025 ; Conference date: 04-07-2025 Through 07-07-2025",
year = "2025",
doi = "10.1109/ICPET66029.2025.11160347",
language = "English",
series = "2025 7th International Conference on Power and Energy Technology, ICPET 2025",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "282--287",
booktitle = "2025 7th International Conference on Power and Energy Technology, ICPET 2025",
}