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High frequency attenuation and dispersion affect partial discharge detection and location in shielded power cables. The effect of high frequency attenuation is well understood through both measurement and computation, which cannot be said of dispersion. The electromagnetic propagation velocity as a function of frequency in concentric neural distribution cable has been computed from measured material...
Dispersion, the variation in propagation velocity with frequency, is one of those phenomena that people in the field of partial discharge (PD) detection have talked about since at least the early 1980s, but which is lacking a formal treatment in the literature. When one of the authors recently published an analytic theory of PD propagation in shielded power cable, both reviewers said "dispersion,...
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