Promoting condition monitoring and diagnostics of electrical insulation in undergraduate capstone graduation projects

El-Hag, Ayman H.

doi:10.1109/mei.2015.7214440

Cited by 6 publications

(3 citation statements)

References 5 publications

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“…x iq is defined as the nth order origin moment of segment i. The four segments a 01 , a 02 , a 03 and a 04 are assigned according to the conditions listed in Equations ( 9) and (10), respectively.…”

Section: Characteristic Analysis Of Time Series Cumulantmentioning

confidence: 99%

“…On the one hand, these redundant data parts will not only occupy a lot of storage space and computing resources but will also have pulse characteristics similar to partial discharge signals, which will lead to the deviation of diagnosis results from reality. A suitable method to solve this problem is pulse truncation, which aims to detect and intercept partial discharge pulses from measured data [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

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Partial Discharge Pulse Segmentation Approach of Converter Transformers Based on Higher Order Cumulant

et al. 2022

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As one of the most effective methods to detect the partial discharge (PD) of transformers, high frequency PD detection has been widely used. However, this method also has a bottleneck problem; the biggest problem is the mixed pulse interference under the fixed length sampling. Therefore, this paper focuses on the study of a new pulse segmentation technology, which can separate the partial discharge pulse from the sampling signal containing impulse noise so as to suppress the interference of pulse noise. Based on the characteristics of the high-order-cumulant variation at the rising edge of the pulse signal, a method for judging the starting and ending time of the pulse based on the high-order-cumulant is designed, which can accurately extract the partial discharge pulse from the original data. Simulation results show that the location accuracy of the proposed method can reach 94.67% without stationary noise. The field test shows that the extraction rate of the PD analog signal can reach 79% after applying the segmentation method, which has a great improvement compared with a very low location accuracy rate of 1.65% before using the proposed method.

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Section: Characteristic Analysis Of Time Series Cumulantmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Partial Discharge Pulse Segmentation Approach of Converter Transformers Based on Higher Order Cumulant

et al. 2022

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“…In polymer insulators, this heating initiates the appearance of a corona and the appearance of a dry band phenomenon. The appearance of the corona and the dry band initiates the appearance of electrical failure [19].…”

Section: Leakage Currentmentioning

confidence: 99%

Effect of Seawater and Fly Ash Contaminants on Insulator Surfaces Made of Polymer Based on Finite Element Method

Negara¹,

Hernanda²,

Asfani³

et al. 2021

Energies

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Polymer is an insulating substance that has become increasingly popular in recent years due to its benefits. Light density, superior dielectric and thermal properties, and water-resistant or hydrophobic properties are only a few of the benefits. The presence of impurities or pollutants on the insulator’s surface lowers its dielectric capacity, which can lead to current leakage. The influence of seawater and fly ash pollutants on the distribution of the electric field and the current density of the insulator was simulated in this study. The finite element method was used to execute the simulation (FEM). Polymer insulators are subjected to testing in order to gather current leakage statistics. The tested insulator is exposed to seawater pollution, which varies depending on the equivalent salt density deposit value (ESDD). The pollutant insulator for fly ash varies depending on the value of non-soluble deposit density (NSDD). The existence of a layer of pollutants increased the value of the electric field and the value of the surface current density, according to the findings. Both in simulation and testing, the ESDD value of seawater pollutants and the NSDD value of fly ash contaminants influenced the value of the leakage current that flowed. The greater the ESDD and NSDD values are, the bigger the leakage current will be.

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A combined preprocessing method for UHF PD detection based on kurtosis features

Zhang

Long

et al. 2017

Journal of the Chinese Institute of Engineers

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Promoting condition monitoring and diagnostics of electrical insulation in undergraduate capstone graduation projects

Abstract: United Arab EmiratesFour high-voltage projects related to condition monitoring of electrical insulation are briefly described. Monitoring and diagnosis of the condition of electrical insulation can be presented to undergraduate students as a multidisciplinary research area.

Cited by 6 publications

References 5 publications

Partial Discharge Pulse Segmentation Approach of Converter Transformers Based on Higher Order Cumulant

Partial Discharge Pulse Segmentation Approach of Converter Transformers Based on Higher Order Cumulant

Effect of Seawater and Fly Ash Contaminants on Insulator Surfaces Made of Polymer Based on Finite Element Method

A combined preprocessing method for UHF PD detection based on kurtosis features

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