Jaber, Adel, Lazaridis, Pavlos, Zhang, Y, Upton, David, Mohamad, Hamd, Khan, Umar, Saeed, B., Mather, Peter, Vieira, M F Q, Atkinson, Robert, Judd, M and Glover, Ian (2015) Comparison of contact measurement and free-space radiation measurement of partial discharge signals. In: 2015 21st International Conference on Automation and Computing (ICAC). IEEE. ISBN 978-0-9926-8011-4

Two partial discharge (PD) measurement techniques, a contact measurement technique (similar to the IEC 60270 standard measurement) and a free-space radiation (FSR) measurement technique, are compared for the case of a floating electrode PD source. The discharge pulse shapes and PD characteristics under high voltage DC conditions are obtained. A comparison shows greater similarity between the two measurements than was expected. It is inferred that the dominant mechanism in shaping the spectrum is the band-limiting effect of the radiating structure rather than band limiting by the receiving antenna. The cumulative energies of PD pulses in both frequency and time domains are also considered.

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