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A technique is developed for extraction of the wave propagation properties of power cables from S-parameter measurements. The method extracts the complex propagation constant and the characteristic impedance, as well as the LCRG Telegrapher's Equation parameters. The extraction process is developed after clarifying the effect of the connection between the measurement port and the power cable. It is concluded that treating the connection solely as a characteristic impedance change could lead to considerable errors in the parameter extraction. Furthermore, the method corrects for electrical lengths, which are not accounted for by the standard Network Analyzer calibration. The extraction is demonstrated for a medium volt-( ) age crosslinked polyethylene XLPE cable over the frequency range 300 kHz to 300 MHz. The results are compared to a time domain short pulse propagation method for cable characterization. Both measurement methods are evaluated against a cable model.

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In this paper, the wave propagation characteristics of such studies are generally carried out at high frequencies, up to single-phase medium voltage (MV) cross-linked polyethylene about 100 MHz, by sending pulses or signals from a point, (XLPE) cable are determined using Time Domain Reflectometry which then travel through the conductor that essentially acts as (TDR) measurement technique. TDR delivers the complex propagation constant (attenuation and phase constants) of lossy a transmission medium. The incident and the reflected signals cable transmission line as a function of frequency. The frequency-are analyzed. These signals are distorted or changed in one dependent propagation velocity is also determined from the TDR way or the other by the transmission medium, and the measurements through the parameters extraction procedure. The reconstruction techniques are applied to get the desired wave TDR measurement results for MV XLPE cable and covered-.. .conductor (CC) overhead line are compared and it is proved that propagaion characteristcs (propagation constant; attenuation CC line has lower attenuation and higher propagation velocity and phase constants, and propagation velocity) from the than power cable. The measurement results can be used to measurements. Frequency and time domain techniques are localize the discontinuities in XLPE power cables and for PD used, hence, the need for understanding basic electromagnetic detection to monitor falling trees on the MV CC overhead lines. theories and their practical applications is prerequisite [4,5].Any signal will loose some of its energy or signal strength as