On the Feasibility of Gap Detection of Power Transformer Partial Discharge UHF Signals: Gap Propagation Characteristics of Electromagnetic Waves

Xiaoxing Zhang, Guozhi Zhang, Yalong Li, Jian Zhang and Rui Huang
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Xiaoxing Zhang: School of Electrical Engineering, Wuhan University, Wuhan 430072, China
Guozhi Zhang: School of Electrical Engineering, Wuhan University, Wuhan 430072, China
Yalong Li: School of Electrical Engineering, Wuhan University, Wuhan 430072, China
Jian Zhang: School of Electrical Engineering, Wuhan University, Wuhan 430072, China
Rui Huang: Shandong Electric Power Research Institute, State Grid Shandong Electric Power Company, Jinan 250002, China

Energies, 2017, vol. 10, issue 10, 1-16

Abstract: This study analyzed the transformer electromagnetic gap propagation characteristics. The influence of gap size is also analyzed, and the results experimentally verified. The obtained results indicated that the gap propagation characteristics of electromagnetic wave signals radiated by the partial discharge (PD) source in different directions are substantially different. The intensity of the electromagnetic wave in the gap reaches a maximum at a gap height of 1 cm; and inside the gap, the intensity of the electromagnetic wave depicted an increasing trend at the tail area of the gap. Finally, from the obtained results, some suggestions on where to install sensors in practical systems for ultra high frequency (UHF) PD signal detection in the transformer gap are provided. The obtained results confirmed the feasibility of using this approach. These results can be seen as a benchmark and a challenge for further research in this field.

Keywords: power transformer; partial discharge (PD); UHF detection; gap; propagation characteristics (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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