WO WO2026159732A1
The present invention relates to a real-time monitoring system for detecting sheath-to-ground (SG) faults in high-voltage direct current (HVDC) cable systems. It employs a non-intrusive inductive coupler for Time-Domain Reflectometry (TDR), enabling continuous monitoring without disrupting operations. Combining TDR with Decision Tree Regression (DTR), the system processes fault reflections using historical data for precise fault localization. Fast Fourier Transform (FFT) enhances signal clarity by extracting frequency features, while an automated fault location algorithm ensures accurate fault estimation across varying cable lengths. Challenges such as signal dispersion, overlapping reflections, and environmental variations are addressed through dynamic sheath impedance calculations and real-time updates. Optimized for reliability and adaptability, this system minimizes signal distortion and improves fault detection, offering a cost-effective and efficient solution for HVDC cable fault diagnosis.
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