TELKOMNIKA Telecommunication, Computing, Electronics and Control
Partial discharge measurements for investigating defected solid dielectrics

TELKOMNIKA Telecommunication, Computing, Electronics and Control
Partial discharge measurements for investigating defected solid dielectrics

Cavity
COMSOL Multiphysics
Modelling
Partial discharge measurement
Solid dielectrics

Insulation system in high voltage power equipment plays an important role for
the reliability of the electric power system. So, it is necessary to assess its
performance to prevent any sudden interruption in the power system. Partial
discharge (PD) in solid dielectrics could occur due to the presence of a cavity
or a crack within the insulating material which could be formed during
manufacturing, installing or/and operating conditions. Since internal cavities
are the main source of the PD activities, they can lead to causing deterioration
of the insulation system and consequently a complete failure may be occurred.
In this paper, PD measurement and simulation are performed on a rubber
insulating material with variable cylindrical cavity diameters. High-frequency
current transformer (HFCT) technique is introduced for PD measurement.
Therefore, a PD simulation model is developed using COMSOL Multiphysics
program interlinked with Matlab software in order to investigate the influence
of cavity geometry on the PD behavior in insulating material. Both measured
and simulated results indicate that PD magnitude is strongly depending on
changing the cavity size inside the insulating material. The results show a good
agreement between experimental and simulated data outputs in terms of
maximum PD magnitude.

Ahmed S. Haiba, Adel A. El-Faraskoury, Ahmed D. El-Koshairy, Mamdouh M. Halawa

http://journal.uad.ac.id/index.php/TELKOMNIKA

Aug 21, 2021

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