Application of FEA to image-based models of electrical trees with uniform conductivity

Rowland, S. M.; Schurch, Roger; Pattouras, Michalis; Li, Qi

doi:10.1109/tdei.2015.004922

Cited by 34 publications

(25 citation statements)

References 30 publications

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“…6 shows how the divergence in the entropy values operates as a strong indicator of the deterioration process. It is observed that as the fault evolves locally deteriorating the insulating medium [10,11,19], different pulses with different entropic characteristics are manifested. The evolution of this deterioration has a correlation with the appearance of a greater number of pulses, whose entropy values diverge from average value (close to 2), as Fig.…”

Section: Entropic Featuresmentioning

confidence: 99%

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2019

JEE

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This paper presents a novel analysis tool based on partial discharge (PD) pulses waveform to determinate deterioration process as the fault evolves carbonizing the insulating medium in epoxy resin specimens. The PD pulses were acquired in the laboratory under controlled conditions; specially designed specimens were tested with a tip-flat electrode configuration immersed in a thermostable polymer (epoxy resin). Then, in the processing step, all acquired PD pulses were characterized with the Shannon entropy, and its variations along the deterioration process were studied. It was observed that the dispersion of this quantity increases with the deterioration of the medium, which allowed identifying different deterioration stages. The evolution of the deterioration has a correlation with the appearance of a greater number of pulses, whose entropy values diverge from average value (close to 2). These new pulses were analyzed using signal processing tools. It was found that there are important differences in the spectral content of each family, in the time-scale characteristics and in the energy distribution of the same frequency bands corresponding to each pulses family. In this work, the deterioration of epoxy resin specimens was characterized throughout the modifications observed in the characteristics of PD pulses during the entire failure process. It could be verified that there is information about the deterioration of the medium contained in the characteristics of the analyzed pulses.

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Section: Entropic Featuresmentioning

confidence: 99%

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2019

JEE

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“…To perform the test, a tip-plane configuration was used [10,11]. The potential-connected electrodes were JEMCO electro-acupuncture needles of 0.2 millimeters of diameter, copper handle and a radius of curvature at its tip of 3 micrometers.…”

Section: Adopted Electrode Configurationmentioning

confidence: 99%

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2019

JEE

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This paper presents a novel analysis tool based on partial discharge (PD) pulses waveform to determinate deterioration process as the fault evolves carbonizing the insulating medium in epoxy resin specimens. The PD pulses were acquired in the laboratory under controlled conditions; specially designed specimens were tested with a tip-flat electrode configuration immersed in a thermostable polymer (epoxy resin). Then, in the processing step, all acquired PD pulses were characterized with the Shannon entropy, and its variations along the deterioration process were studied. It was observed that the dispersion of this quantity increases with the deterioration of the medium, which allowed identifying different deterioration stages. The evolution of the deterioration has a correlation with the appearance of a greater number of pulses, whose entropy values diverge from average value (close to 2). These new pulses were analyzed using signal processing tools. It was found that there are important differences in the spectral content of each family, in the timescale characteristics and in the energy distribution of the same frequency bands corresponding to each pulses family. In this work, the deterioration of epoxy resin specimens was characterized throughout the modifications observed in the characteristics of PD pulses during the entire failure process. It could be verified that there is information about the deterioration of the medium contained in the characteristics of the analyzed pulses.

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Section: Adopted Electrode Configurationmentioning

confidence: 99%

Section: Entropic Featuresmentioning

confidence: 99%

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2017

JEE

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WINNER, a German research project, integrates local photovoltaic systems, charging infrastructure for electric vehicles and tenant households, focusing devices with and without smart grid abilities. The project's goal is to manage the local power grid operations in a way that allows locally produced energy to be consumed locally. This local optimised consumption is done by using currently available devices. Further, we want to analyse accruing data streams and optimise the usage of local devices to manage this time-base shifted consumption scenario by implementing a non-hard real-time processing system. In this paper, we outline the project's primary objectives from a technical point of view. First, we present "Wohnungswirtschaftlich integrierte netzneutrale Elektromobilitat in Quartier und Region" (WINNER) and some related research projects. We describe the integration tasks, the data sources, and sinks. So, a project overview can be given. Afterwards, we compare our approach and already developed technologies. Requirements are derived from the system overview. According to them, we can outline an architectural view of the core component of data stream processing within this scenario. Finally, the results are discussed, and consequences are drawn.

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Application of FEA to image-based models of electrical trees with uniform conductivity

Cited by 34 publications

References 30 publications

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