Wirescan As

Paolo Franco Fantoni

A method and a system are described for monitoring a condition of an electrical cable. The method comprises applying a broadband signal wave to a first end of the electrical cable, wherein the broadband signal wave is phase and amplitude modulated and acquiring the phase and amplitude modulated broadband signal wave transmitted and reflected by the electrical cable. Signal analyses is performed which results in establishing a relationship between a real and an imaginary part of a phase impedance spectrum Fourier transform of the power spectrum in an interval around at least one of the locations along the cable, and identifying impedance changes in these locations. Analyzing a second order reflection of the broadband signal in said identified fault locations may establish a local degradation severity of an identified fault in the cable insulation in at least one of the locations along the cable.

Method and system for monitoring a condition of electrical cables

The present invention provides a method for monitoring a condition of an electrical cable, the method including: providing a reference signal CHand a signal CH, the signal CHbeing the reference signal CHafter amplitude and phase modulation by a cable impedance Zof the electrical cable; calculating the cable impedance Zas a function of the applied signal frequency based on the reference signal CHand the signal CH; and analyzing the cable impedance providing an assessment of the cable condition. A system performing the method is also disclosed.

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Genoa, Italy

Paolo Franco Fantoni