Propagation characteristics of three-phase belted paper cable for on-line PD detection

Partial discharge detection and interpretation benefits from accurate knowledge of the channel through which a discharge pulse propagates. In this paper the propagation of signals in a three-phase belted paper cable is studied for the purpose of online partial discharge detection. In this case, a general multi-conductor transmission line model characterizes signal propagation. However, if a specific method of measurement is applied, a simplified two-conductor transmission line model is sufficient.. Experiments support this observation. The simplified model is used to model the impulse response of the channel and therefore the measured waveform can be estimated. Model parameters are obtained through experiments and the model is verified by experiments