Validations of simulation of UHF electromagnetic wave propagation in an oil‐filled tank by time‐domain measurements

Umemoto, Takuya; Tenbohlen, Stefan

doi:10.1049/iet-gtd.2018.6173

Cited by 4 publications

(4 citation statements)

References 31 publications

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“…Based on the aforementioned, the measured TDOA between the ith and jth sensors, obtained from Equation (2), can be decomposed as follows: τij = 𝜏 i j + 𝜏 i j,error (6) where…”

Section: Reflection and Refraction Of The Emwsmentioning

confidence: 99%

“…The UHF method is similar to the acoustic method, except that the installed UHF sensors on the transformer tank measure the EMWs that are emitted from the PD source. The characteristics of the PD EMWs inside the power transformer and their attenuation in different frequency ranges are investigated in [6] by experiment and simulation. Sinaga et al classified and recognized single and multiple PD source types in the power transformers using UHF measurements [7].…”

Section: Introductionmentioning

confidence: 99%

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Ultra‐high frequency sensors positioning on the power transformer to mitigate the negative effects on the partial discharge localization accuracy

Jangjoo,

Allahbakhshi,

Mirzaei

2024

IET Generation Trans & Dist

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This paper proposes a new method for improving the partial discharge (PD) localization accuracy by detecting the best places of ultra‐high frequency (UHF) sensors on the power transformer tank. In this way, firstly, the critical sites inside the power transformer that can produce PD are determined. Then the sensors’ positioning is done in such a way that if the PD happens at each point of these critical sites, the distance between the estimated PD location obtained by solving the time difference of arrival (TDOA) equations and the actual PD location is laid in an acceptable range. For this purpose, the TDOA equations are linearized around the critical PD coordinates as a matrix form A.X = B. The configuration of the sensor positions that minimizes the condition number of the matrix A is the best configuration. To evaluate the effectiveness of the proposed method, several simulations and evaluations are performed on a power transformer in the CST software. The obtained results and comparing them with the previous method and also conventional arbitrary sensors positioning confirm the effectiveness of this method.

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“…Based on the aforementioned, the measured TDOA between the ith and jth sensors, obtained from Equation (2), can be decomposed as follows: τij = 𝜏 i j + 𝜏 i j,error (6) where…”

Section: Reflection and Refraction Of The Emwsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ultra‐high frequency sensors positioning on the power transformer to mitigate the negative effects on the partial discharge localization accuracy

Jangjoo,

Allahbakhshi,

Mirzaei

2024

IET Generation Trans & Dist

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show abstract

“…Still in 2019, a similar study to the one presented in [109] was carried out in [110], in which comparisons were presented between the arrival time instants computationally calculated and those obtained in practice. The authors demonstrated that the measured and simulated results were in agreement, attesting that the use of simulations of the wave propagation phenomena inside the transformer represents a powerful tool that can be combined with the development of algorithms for locating defective sources.…”

Section: Location Of Pd Sources In High Voltage Equipmentmentioning

confidence: 99%

“…-15 [110] Presented comparisons between the arrival times obtained in practice and those calculated computationally from simulations considering internal reflections and refractions of the power transformers.…”

Section: Cross Correlation -[70]mentioning

confidence: 99%

Detection, Classification and Location of Sources of Partial Discharges Using the Radiometric Method: Trends, Challenges and Open Issues

et al. 2021

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In this article, we provide a comprehensive survey on the most relevant research in the area of detection, classification and location of partial discharge (PD) sources using the radiometric or ultra high frequency (UHF) method, focusing mainly on the works related to the use of antennas. To the best of the authors knowledge, this is the first review paper that focuses on the application of antennas based on UHF method in the complete diagnosis of PD. Specifically, we first present the main contributions to the development and optimization of UHF sensors for application in the detection of PD sources. Second, articles that used the UHF method to identify different types of PD in high voltage equipment are described. Finally, the main contributions regarding the location of sources of defects using the radiometric method are presented. Summary of works in the area of UHF detection sensors, PD classification and PD location, with their respective contributions, are shown. Finally, research trends, challenging and open issues are discussed. The purpose of this article is to provide important information about the complete diagnosis of PD, which could be used to guide the development of more efficient techniques in this research area.

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Partial discharge localisation in transformers using UHF technique: non-iterative method

Antony

Mishra

Todi

et al. 2020

Int. j. inf. tecnol.

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Validations of simulation of UHF electromagnetic wave propagation in an oil‐filled tank by time‐domain measurements

Cited by 4 publications

References 31 publications

Ultra‐high frequency sensors positioning on the power transformer to mitigate the negative effects on the partial discharge localization accuracy

Ultra‐high frequency sensors positioning on the power transformer to mitigate the negative effects on the partial discharge localization accuracy

Detection, Classification and Location of Sources of Partial Discharges Using the Radiometric Method: Trends, Challenges and Open Issues

Partial discharge localisation in transformers using UHF technique: non-iterative method

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