Investigating suitable positions in power transformers for installing UHF antennas for partial discharge localization

Mirzaei, Hassan Reza; Akbari, Asghar; Zanjani, M.; Miralikhani, K.; Gockenbach, E.; Borsi, H.

doi:10.1109/cmd.2012.6416223

Cited by 6 publications

(3 citation statements)

References 5 publications

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“…For the sensors installed in the gaps between winding V and the other two windings, i.e., sensors 2, 3, 6, 7, 10 and 11 on the HV side and sensors 14,15,18,19,22, and 23, it is evident from Table 2 that most of these sensors receive signals above the threshold from all sources. Only two sensors receive one signal each that are below the threshold, and even these signals are slightly below the threshold of 16.5 mV.…”

Section: Hv and Mv/lv Sensorsmentioning

confidence: 99%

“…Recent developments have included different designs of UHF sensors [5][6][7][8][9], PD source localization algorithms [10,11], and a calibration proposal [12,13] so that the method can be introduced in addition to the IEC 60270 PD measurement [14] during transformer acceptance tests. Since UHF PD measurement requires the placement of UHF sensors at different positions on the transformer tank [9,15,16], it is required to analyze the sensitivity of various prospective sensor positions.…”

Section: Introductionmentioning

confidence: 99%

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Quantitative Analysis of the Sensitivity of UHF Sensor Positions on a 420 kV Power Transformer Based on Electromagnetic Simulation

et al. 2019

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With an increasing interest in ultra-high frequency (UHF) partial discharge (PD) measurements for the continuous monitoring of power transformers, it is necessary to know where to place the UHF sensors on the tank wall. Placing a sensor in an area with many obstructions may lead to a decrease in sensitivity to the UHF signals. In this contribution, a previously validated simulation model of a three-phase 300 MVA, 420 kV power transformer is used to perform a sensitivity analysis to determine the most sensitive sensor positions on the tank wall when PD activity occurs inside the windings. A matrix of UHF sensors located on the transformer tank is used to perform the sensitivity analysis. Some of the windings are designed as layer windings, thus preventing the UHF signals from traveling through them and creating a realistic situation with very indirect propagation from source to sensor. Based on these findings, sensor configurations optimized for UHF signal sensitivity, which is also required for PD source localization, are recommended for localization purposes. Additionally, the propagation and attenuation of the UHF signals inside the windings and the tank are discussed in both oil and air.

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Section: Hv and Mv/lv Sensorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Quantitative Analysis of the Sensitivity of UHF Sensor Positions on a 420 kV Power Transformer Based on Electromagnetic Simulation

et al. 2019

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show abstract

“…Moreover, many researches were done recently in the field of PD detection and defective region identification in power transformers to provide improvements on the mentioned techniques to present the new/combined methods to elevate the accuracy and sensitivity of the old ones [21–26].…”

Section: Introductionmentioning

confidence: 99%

Feasibility study for partial discharge detection and defective region identification in power transformers by using distributed sensors

Mohammadi

Haghjoo

2016

IET Generation, Transmission & Distribution

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Attenuation of UHF Signals in a 420 kV Power Transformer Based on Experiments and Simulation

Beura

Beltle

Tenbohlen

2019

Lecture Notes in Electrical Engineering

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Investigating suitable positions in power transformers for installing UHF antennas for partial discharge localization

Cited by 6 publications

References 5 publications

Quantitative Analysis of the Sensitivity of UHF Sensor Positions on a 420 kV Power Transformer Based on Electromagnetic Simulation

Quantitative Analysis of the Sensitivity of UHF Sensor Positions on a 420 kV Power Transformer Based on Electromagnetic Simulation

Feasibility study for partial discharge detection and defective region identification in power transformers by using distributed sensors

Attenuation of UHF Signals in a 420 kV Power Transformer Based on Experiments and Simulation

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