Finite Element Analysis of Charge Injection and Transport in a Dielectric Liquid

Lee, Se-Hee; O’Sullivan, Francis; Park, Il-Han; Zahn, M.; Pettersson, Lars; Liu, Rongsheng; Hjortstam, Olof; Jaksts, A.; Auletta, Tommaso; Gäfvert, U.

doi:10.1109/ceidp.2006.312078

Cited by 5 publications

(3 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Accurate and reliable results can be obtained using COMSOL Multiphysics as reported in [23]. Therefore, COMSOL Multiphysics [24] is used in this paper.…”

Section: Finite-element Analyses To Evaluate Electric Field In the Prmentioning

confidence: 99%

Breakdown performance of transformer oil in the presence of single‐phase nanocrystalline ZnO and nano‐partial substitution

Sabiha

Ghoneim

Hessien

2019

IET Science, Measurement & Technology

View full text Add to dashboard Cite

“…Accurate and reliable results can be obtained using COMSOL Multiphysics as reported in [23]. Therefore, COMSOL Multiphysics [24] is used in this paper.…”

Section: Finite-element Analyses To Evaluate Electric Field In the Prmentioning

confidence: 99%

Breakdown performance of transformer oil in the presence of single‐phase nanocrystalline ZnO and nano‐partial substitution

Sabiha

Ghoneim

Hessien

2019

IET Science, Measurement & Technology

View full text Add to dashboard Cite

“…SPACE charge in liquid insulation depends on charge mobility, recombination, attachment, and dissipation mechanisms [1][2]. Such behavior seriously distorts the intrinsic electric field distribution and can even cause insulator breakdown.…”

Section: Introductionmentioning

confidence: 99%

Space charge dynamics investigation based on Kerr electro-optic measurements and processing of CCD images

Shi

Yang

Sima

et al. 2013

IEEE Trans. Dielect. Electr. Insul.

Self Cite

View full text Add to dashboard Cite

The Kerr electro-optic technique is used to investigate electric field and space charge effects using large Kerr constant propylene carbonate as the dielectric liquid with Kerr constant B≈1.22×10 -12 m/V 2 . However, improved accuracy of this technique to measure space charge distributions remains an important goal. This paper describes inversion algorithm research on obtaining accurate space charge distributions from Kerr measurements. The original charge-coupled device (CCD) image of light intensity was converted into grayscale values for improved calculation. The grayscale CCD image was transformed into the frequency domain through a two-dimensional Fourier transformation. Butterworth filtering techniques were employed for edge enhancement algorithms. The most important parameter for calculation of space charge distributions are the integer fringe numbers n in the sequence of light and dark fringes measured by the CCD camera. Comparison of the improved algorithm and traditional methods for calculating electric field and space charge distributions between a pair of stainless steel parallel plate electrodes was investigated. The space charge dynamics were also calculated after processing the CCD images with some improvements. The results showed the electric field was essentially uniform at early times of pulsed high voltages. This uniformity indicated the absence of space charge during the early transient interval, while a bipolar charge injection was found in the central region between electrodes at later times. For longer times the electric field and space charge distributions slowly became uniform again. Grayscale processing and Butterworth filtering played an important role in the improvement of the algorithm for better image quality and edge enhancement.

show abstract

“…The presence of space charge can change the electric field distribution inside the liquid dielectric, thus it has an important impact on the process of streamer propagation. [1][2][3] Studies have shown that the addition of nanoparticles will affect the insulation strength of a liquid dielectric. [4][5][6][7][8][9] Segal et al added magnetic nanoparticles into a transformer oil and enhanced the positive impulse breakdown voltage to nearly double its value under a needle-sphere electrode configuration.…”

mentioning

confidence: 99%

Effect of Fe3O4 nanoparticles on space charge distribution in propylene carbonate under impulse voltage

Sima

Yang

et al. 2015

AIP Advances

View full text Add to dashboard Cite

Addition of nanoparticles of the ferromagnetic material Fe3O4 can increase the positive impulse breakdown voltage of propylene carbonate by 11.65%. To further investigate the effect of ferromagnetic nanoparticles on the space charge distribution in the discharge process, the present work set up a Kerr electro-optic field mapping measurement system using an array photodetector to carry out time-continuous measurement of the electric field and space charge distribution in propylene carbonate before and after modification. Test results show that fast electrons can be captured by Fe3O4 nanoparticles and converted into relatively slow, negatively charged particles, inhibiting the generation and transportation of the space charge, especially the negative space charge.

show abstract

Finite Element Analysis of Charge Injection and Transport in a Dielectric Liquid

Cited by 5 publications

References 3 publications

Breakdown performance of transformer oil in the presence of single‐phase nanocrystalline ZnO and nano‐partial substitution

Breakdown performance of transformer oil in the presence of single‐phase nanocrystalline ZnO and nano‐partial substitution

Space charge dynamics investigation based on Kerr electro-optic measurements and processing of CCD images

Effect of Fe3O4 nanoparticles on space charge distribution in propylene carbonate under impulse voltage

Contact Info

Product

Resources

About