| Title |
Fault Location of Submarine Cables Using Mixed-Signal Reflectometry Based on Adaptive Window Integration |
| Authors |
노우진(Woo-Jin Noh) ; 김선혁(Seon Hyeog Kim) ; 이용태(Yongtae Lee) ; 권구영(Gu-Young Kwon) |
| DOI |
https://doi.org/10.5370/KIEE.2026.75.8.1908 |
| Keywords |
Adaptive time window; Cable fault location; Cable network; Condition diagnosis; Mixed-Signal Reflectometry; Submarine cable |
| Abstract |
This paper presents an adaptive time-window integration method for Mixed-Signal Reflectometry (MSR)-based fault location in an 800 mm MI submarine cable model. In MSR, the DC component of the squared response is extracted at each swept frequency and transformed into a distance response using FFT. Since the squared signal contains a ripple, a fixed integration window may cause frequency-dependent DC estimation errors. The proposed method adjusts the integration window according to the ripple period at each frequency. An Advanced Design System (ADS) model with a 100 m cable, a 50 Ω shunt fault at 70 m, and an open terminal was used for verification. The fixed 1 μs and adaptive 1-cycle windows estimated the fault at 76.831 m and 70.343 m, respectively. Under white Gaussian noise, the 32-cycle window showed the lowest RMSE for all tested SNRs, indicating improved robustness of MSR-based submarine cable fault diagnosis. |