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   Articles with "partial discharges" as a keyword



AC Breakdown Voltage and Partial Discharge Activity in Synthetic Ester-Based Fullerene and Graphene Nanofluids

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recommendations! Published in 2022 at "IEEE Access"

DOI: 10.1109/access.2022.3140928

Abstract: This paper deals with the study of the AC breakdown voltage (BDV) and partial discharges (PDs) activity of synthetic ester-based nanofluids (NF) with two kinds of carbonic nanoparticles (NPs), namely graphene (Gr) and fullerene (C60);… read more here.

Keywords: synthetic ester; breakdown voltage; activity; partial discharges ... See more keywords

Partial discharges at different voltage waveshapes: Comparison between two different acquisition systems

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recommendations! Published in 2018 at "IEEE Transactions on Dielectrics and Electrical Insulation"

DOI: 10.1109/tdei.2018.006782

Abstract: In modern HV apparatuses the wide use of electronic converters, increase the stress on the involved insulation systems and thus affect the reliability of the whole power grid. Additionally, such non-sinusoidal voltage shapes contain high… read more here.

Keywords: voltage; voltage waveshapes; partial discharges; acquisition ... See more keywords

Registration and simulation of partial discharges in free bubbles at AC voltage

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recommendations! Published in 2019 at "IEEE Transactions on Dielectrics and Electrical Insulation"

DOI: 10.1109/tdei.2019.007808

Abstract: Partial discharges in free bubbles in transformer oil are investigated both experimentally and theoretically. Optical, electric and optoelectronic registration are performed to obtain a picture of partial discharge. The time duration of electrical and optoelectronic… read more here.

Keywords: free bubbles; discharges free; partial discharges; registration simulation ... See more keywords

Mechanism of partial discharges in free helium bubbles in transformer oil

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recommendations! Published in 2019 at "IEEE Transactions on Dielectrics and Electrical Insulation"

DOI: 10.1109/tdei.2019.008199

Abstract: Partial discharges (PD) in floating bubbles and in microspheres made from thin glass walls in transformer oil were studied experimentally and theoretically. In a test cell, the PD occurrence was a very rare event. Sometimes… read more here.

Keywords: mechanism; transformer oil; helium bubbles; partial discharges ... See more keywords

Partial Discharges Identification and Localisation within Transformer Windings

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recommendations! Published in 2020 at "IEEE Transactions on Dielectrics and Electrical Insulation"

DOI: 10.1109/tdei.2020.008706

Abstract: This study proposes a technique that is based on the hypothesis that distinct PD sources have unique PD waveform characteristics at the point of measurement. Two different forms of PD pulses are injected into a… read more here.

Keywords: localisation within; transformer windings; discharges identification; identification localisation ... See more keywords

Continuous Partial Discharges Analysis During Automated Thermal Cycle Aging Experiment

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recommendations! Published in 2020 at "IEEE Transactions on Energy Conversion"

DOI: 10.1109/tec.2020.3025434

Abstract: This work presents an experiment proposal for continuous partial discharge analysis during an automated thermal cycle experiment for hydro generator stator coils/bars. It is an innovative approach because we propose to perform partial discharges test… read more here.

Keywords: analysis automated; thermal cycle; continuous partial; partial discharges ... See more keywords

Partial Discharges Pattern Recognition of Transformer Defect Model by LBP & HOG Features

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recommendations! Published in 2019 at "IEEE Transactions on Power Delivery"

DOI: 10.1109/tpwrd.2018.2872820

Abstract: Partial discharge (PD) measurement and identification have great importance to condition monitoring of power transformers. In this paper, a new method for recognition of single and multi-source of PD based on extraction of high level… read more here.

Keywords: hog; partial discharges; model; image ... See more keywords

Towards Generalizable Classification of Partial Discharges in Gas-Insulated HVDC Systems Using Neural Networks: Protrusions and Particles

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recommendations! Published in 2024 at "IEEE Transactions on Power Delivery"

DOI: 10.1109/tpwrd.2024.3369872

Abstract: Undetected partial discharges (PDs) are a safety critical issue in high voltage (HV) gas-insulated systems (GIS). While the diagnosis of PDs under AC voltage is well-established, the analysis of PDs under DC voltage remains an… read more here.

Keywords: generalizable classification; gas insulated; voltage; partial discharges ... See more keywords
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Assessment of dielectric strength and partial discharges patterns in nanocomposites insulation of single-core power cables

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recommendations! Published in 2021 at "Journal of Advanced Dielectrics"

DOI: 10.1142/s2010135x21500223

Abstract: Nanoparticles succeeded to enhance the dielectric properties of industrial insulation but the presence of voids inside the power cable insulation still leads to formation high electrical stress inside power cable insulation material and collapse. In… read more here.

Keywords: single core; dielectric strength; power; insulation ... See more keywords
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MEMS-on-fiber ultrasonic sensor with two resonant frequencies for partial discharges detection.

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recommendations! Published in 2020 at "Optics express"

DOI: 10.1364/oe.391242

Abstract: A novel fiber optic extrinsic Fabry-Perot interferometric (EFPI) ultrasonic sensor with two resonant frequencies for detecting the partial discharges (PDs) in switchgear is demonstrated. The key sensing element consists of two 5-µm-thickness and beam-supported silicon… read more here.

Keywords: sensor two; ultrasonic sensor; two resonant; resonant frequencies ... See more keywords

Robust Condition Assessment of Electrical Equipment with One Class Support Vector Machines Based on the Measurement of Partial Discharges

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recommendations! Published in 2018 at "Energies"

DOI: 10.3390/en11030486

Abstract: This paper presents a system for the detection of partial discharges (PD) in industrial applications based on One Class Support Vector Machines (OCSVM). The study stresses the detection of Partial Discharges (PD) as they represent… read more here.

Keywords: class support; support vector; equipment; vector machines ... See more keywords