Investigating partial discharge UHF electromagnetic waves propagation in transformers using FDTD technique and 3D simulation

2012 ◽  
Author(s):  
M. Zanjani ◽  
A. Akbari ◽  
H.R. Mirzaei ◽  
N. Shirdel ◽  
E. Gockenbach ◽  
...  
Keyword(s):  
Electromagnetic Waves ◽  
Partial Discharge ◽  
3D Simulation ◽  
Waves Propagation

scholarly journals UHF Partial Discharge Location in Power Transformers via Solution of the Maxwell Equations in a Computational Environment

Sensors ◽  
2019 ◽  
Vol 19 (15) ◽  
pp. 3435 ◽  
Author(s):  
Luiz Nobrega ◽  
Edson Costa ◽  
Alexandre Serres ◽  
George Xavier ◽  
Marcus Aquino
Keyword(s):  
Electromagnetic Waves ◽  
Partial Discharge ◽  
Propagation Delay ◽  
Power Transformers ◽  
Computational Simulations ◽  
3D Space ◽  
Computational Environment ◽  
Three Phase ◽  
Discharge Location ◽  
Particle Swarm Optimisation Algorithm

This paper presents an algorithm for the localisation of partial discharge (PD) sources in power transformers based on the electromagnetic waves radiated by a PD pulse. The proposed algorithm is more accurate than existing methods, since it considers the effects of the reflection, refractions and diffractions undergone by the ultra-high frequency (UHF) signal within the equipment tank. The proposed method uses computational simulations of the electromagnetic waves generated by PD, and obtains the time delay of the signal between each point in the 3D space and the UHF sensors. The calculated signals can be compared with the signals measured in the field, so that the position of the PD source can be located based on the best correlation between the simulated propagation delay and the measured data. The equations used in the proposed method are defined as a 3D optimisation problem, so that the binary particle swarm optimisation algorithm can be used. To test and demonstrate the proposed algorithm, computational simulations were performed. The solutions were sufficient to identify not only the occurrence of defects, but also the winding and the region (top, centre or base) in which the defect occurred. In all cases, an accuracy of greater than 15 cm was obtained for the location, in a 180 MVA three-phase transformer.

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