Effect of Surroundings of UHF Partial Discharge Probes on the Captured Pulses in Power Transformers

Azirani, Mohammad Akbari; Werle, Peter; Akbari, Asghar

doi:10.1109/icd.2018.8470046

Cited by 2 publications

(2 citation statements)

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“…On the other hand, Sinaga et al [ 41 ] and Lee et al [ 41 , 50 ] argued that narrow bandwidth will lead to loss of information in the frequency domain and be considerably more susceptible to UHF signal distortion. When analyzing the PD activities in the frequency domain, the selected range should be considered based on the tank dimensions [ 69 ]. In [ 56 ], researchers consider the external EM interference from radio, TV, and telecommunications can be alleviated by multi-band (multi-resonance) frequency response design.…”

Section: Uhf Sensors In Partial Discharge Detectionmentioning

confidence: 99%

“…In [ 10 , 102 ], the effect of various types of transformer core in terms of the iron packet core, the steel cylindrical shell core and the wooden cylindrical shell core is investigated by simulation. Furthermore, Azirani et al [ 69 ] investigated the effect of the transformer tank on the receiving UHF signal by experimental study. The experiment result is consistent with the simulation result in [ 16 ], the grounding tank configuration can affect the scattering parameters of the UHF antenna including the reflection and transmission coefficient.…”

Section: Effect On Uhf Signal Propagation In a Power Transformermentioning

confidence: 99%

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Application of UHF Sensors in Power System Equipment for Partial Discharge Detection: A Review

Chai

Phung

Mitchell³

2019

Sensors

101

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Condition monitoring of an operating apparatus is essential for lifespan assessment and maintenance planning in a power system. Electrical insulation is a critical aspect to be monitored, since it is susceptible to failure under high electrical stress. To avoid unexpected breakdowns, the level of partial discharge (PD) activity should be continuously monitored because PD occurrence can accelerate the aging process of insulation in high voltage equipment and result in catastrophic failure if the associated defects are not treated at an early stage. For on-site PD detection, the ultra-high frequency (UHF) method was employed in the field and showed its effectiveness as a detection technique. The main advantage of the UHF method is its immunity to external electromagnetic interference with a high signal-to-noise ratio, which is necessary for on-site monitoring. Considering the detection process, sensors play a critical role in capturing signals from PD sources and transmitting them onto the measurement system. In this paper, UHF sensors applied in PD detection were comprehensively reviewed. In particular, for power transformers, the effects of the physical structure on UHF signals and practical applications of UHF sensors including PD localization techniques were discussed. The aim of this review was to present state-of-the-art UHF sensors in PD detection and facilitate future improvements in the UHF method.

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Section: Uhf Sensors In Partial Discharge Detectionmentioning

confidence: 99%