Diagnostics of Low-Voltage Power Cables by Frequency-Response Analysis of Power-Line Communication Channel

摘要

Low-voltage cabling is commonly used in industry applications, for instance in variable-speed drives, and in power distribution grids, where it provides and guarantees safe and uninterrupted power delivery. Hence, on-line diagnosis of cable condition and prognosis of the remaining life-time of cable are essential functions. In this paper, a cable diagnosis method based on broadband impedance spectroscopy, which can be applied by channel frequency-response analysis and implemented with high-frequency band power line communication modems is presented and evaluated with laboratory tests. It is shown that the proposed method is applicable for detecting and locating faults in low-voltage cables.