Breakdown of solid insulating materials under high frequency high voltage stress

Elanseralathan, K.; Thomas, M. Joy; Nagabhushana, G.R.

doi:10.1109/icpadm.2000.876399

Cited by 21 publications

(6 citation statements)

References 4 publications

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“…Influence of thermal aging on breakdown strength. Considering that the effect of applied voltage frequency on breakdown strength of polypropylene film has already been investigated [27,28], AC breakdown strength is concluded to decrease with the increase in applied frequency. Thus, repeating the experiments is not necessary.…”

Section: Breakdown Strength Resultsmentioning

confidence: 99%

Improved model of activation energy absorption for different electrical breakdowns in semi-crystalline insulating polymers

Sima

Jiang

Peng

et al. 2018

J. Phys. D: Appl. Phys.

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Electrical breakdown is an important physical phenomenon in electrical equipment and electronic devices. Many related models and theories of electrical breakdown have been proposed. However, a widely recognized understanding on the following phenomenon is still lacking: impulse breakdown strength which varies with waveform parameters, decrease in the breakdown strength of AC voltage with increasing frequency, and higher impulse breakdown strength than that of AC. In this work, an improved model of activation energy absorption for different electrical breakdowns in semi-crystalline insulating polymers is proposed based on the Harmonic oscillator model. Simulation and experimental results show that, the energy of trapped charges obtained from AC stress is higher than that of impulse voltage, and the absorbed activation energy increases with the increase in the electric field frequency. Meanwhile, the frequency-dependent relative dielectric constant εr and dielectric loss tanδ also affect the absorption of activation energy. The absorbed activation energy and modified trap level synergistically determine the breakdown strength. The mechanism analysis of breakdown strength under various voltage waveforms is consistent with the experimental results. Therefore, the proposed model of activation energy absorption in the present work may provide a new possible method for analyzing and explaining the breakdown phenomenon in semi-crystalline insulating polymers.

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Section: Breakdown Strength Resultsmentioning

confidence: 99%

Improved model of activation energy absorption for different electrical breakdowns in semi-crystalline insulating polymers

Sima

Jiang

Peng

et al. 2018

J. Phys. D: Appl. Phys.

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“…AC breakdown strength of paper is an intrinsic property of dielectric material, independent of the electrode configuration where the electric stress is applied (Amin et al, 2018;Ramli et al, 2014;Zhou & Chen, 2017). The minimum voltage at which the dielectric material fails is known as AC breakdown voltage (Baur et al, 2017;Elanseralathan et al, 2000).…”

Section: Discussionmentioning

confidence: 99%

Physical and Electrical Breakdown Characteristics of Oil-Impregnated Kenaf Paper with the Introduction of External PVA for Transformer Application

Umair¹,

Azis²,

Halis³

et al. 2023

JST

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This work examines the physical and electrical breakdown characteristics of kenaf paper coated with Polyvinyl Alcohol (PVA) for application in power transformers. The paper was made from kenaf bast fibers using the soda pulping method, whereby the pulps were subjected to 12,000 beating revolutions. PVA with weight percentage concentration up to 6% was introduced to the beaten kenaf through a spin coating approach. The structure of the kenaf paper was examined through Scanning Electron Microscopy (SEM). The physical properties examined were apparent density, Tensile Index (TI), Burst Index (BI), and Tear Index (TeI), while AC breakdown voltage and strength were analyzed for the electrical property. It is found that the beating and external PVA improve the kenaf paper’s apparent density, TI, BI, and AC breakdown strength while the TeI decreases.

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“…The reason behind the lower value of the breakdown voltage at the high-frequency stress is due to the internal heating produced during the reorientation of the dipole in the polymer matrix and the inception of PD at a lower voltage in the void initiating the earlier breakdown [29,30]. The neat iPP has a higher breakdown voltage than the 5 wt% concentration at 20 kHz.…”

Section: High-frequency Ac Stressmentioning

confidence: 99%

Influence of nanofiller concentration on polypropylene nanocomposites for high voltage cables

Angalane

Kasinathan

2022

Journal of Electrical Engineering

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Polymeric insulation for HVDC cable is attracting more attention in the modern power transmission system. Especially, the thermoplastic material is desirable for power cable insulation because of its recyclability and ease of processing. Thermoplastic material development is a good alternative to cross-linked polyethylene in the future. Polypropylene has the advantage of avoiding by-products during cable production, which can minimize space accumulation and degassing costs. Therefore, this study investigates the influence of nanofillers on the structural properties of isotactic polypropylene. In addition, the proposed composite material’s morphology, melting, dielectric permittivity, and breakdown strength are examined. Different weight percentages of inorganic nanofillers such as TiO2 and ZnO are used to make nanocomposite thin films. With increasing filler concentration, the dielectric constant of the nanocomposite thin film increases. Apart from that, the dielectric loss of the TiO2 nanocomposite thin film increases with weight percentage initially and it falls nearer to virgin material at a higher frequency. The breakdown strength of the nanocomposite materials shows a similar variation with filler concentration. TiO2 is more resistant to deterioration than ZnO composite. Based on the results of the complete investigation, the TiO2 nanocomposite is better suited for the insulation of HVDC cables.

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Breakdown of solid insulating materials under high frequency high voltage stress

Cited by 21 publications

References 4 publications

Improved model of activation energy absorption for different electrical breakdowns in semi-crystalline insulating polymers

Improved model of activation energy absorption for different electrical breakdowns in semi-crystalline insulating polymers

Physical and Electrical Breakdown Characteristics of Oil-Impregnated Kenaf Paper with the Introduction of External PVA for Transformer Application

Influence of nanofiller concentration on polypropylene nanocomposites for high voltage cables

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