Optical observation of pre-breakdown and breakdown phenomena in transformer oil

Yamashita, H.; Amano, Hiroshi; Mori, T.

doi:10.1088/0022-3727/10/13/010

Cited by 56 publications

(14 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For understanding the breakdown mechanisms in mineral oils, pre-breakdown phenomena, i.e. streamers, have been extensively studied in the past decades [1][2][3][4][5]. A point-plane divergent field is commonly employed in the studies to facilitate the streamer initiation.…”

Section: Introductionmentioning

confidence: 99%

Comparison of streamer propagation in mineral oils under lightning and step impulse voltages

Liu

Wang

Lesaint

2014

2014 IEEE 18th International Conference on Dielectric Liquids (ICDL)

View full text Add to dashboard Cite

Both step impulse and lightning impulse voltages were widely used to study streamer in liquid phenomena. This paper investigates the effects of voltage waveforms including step impulse (0.4/1400 Jls) and lightning impulse (1.2150 Jls) on streamer propagation and breakdown under both positive and negative polarities. The results indicate that lightning impulse quenches the streamer propagation and leads to higher breakdown voltage compared to step impulse. However the acceleration voltages at 5 em gap distance are the same between lightning impulse and step impulse. The observation is valid for both positive and negative polarities.

show abstract

Section: Introductionmentioning

confidence: 99%

Comparison of streamer propagation in mineral oils under lightning and step impulse voltages

Liu

Wang

Lesaint

2014

2014 IEEE 18th International Conference on Dielectric Liquids (ICDL)

View full text Add to dashboard Cite

show abstract

“…Both Yamashita, et.al. 3 and McGrath and Nelson4 obtain at least 10 pictures of the same event in the forward direction using the streak camera technique. Their technique, however, does not provide the resolution oL:ained with the pulsed laser schlieren technique.…”

Section: Discussionmentioning

confidence: 99%

The dynamics of electrical breakdown in liquid hydrocarbons. II

Forster

Wong

1978

1978 IEEE International Conference on Electrical Insulation

View full text Add to dashboard Cite

The development of an electrical spark in purified hydrocarbons has been studied using a pulsed laser schlieren technique. A 15 ns laser pulse, coming from a Q switched ruby laser was split into two or three beams. Two of the beams are sent through the test cell in the same direction with one delayed by 60 ns with respect to the other. They are projected onto two different cameras. With the help of the schlieren optics the movement of the charge carriers is indicated in terms of density gradients. The pictures so obtained suggest that the electrical breakdown column moves between the. parallel surfaces somewhat similar to a tornado. The significance of these findings is discussed in the light of earlier results and a qualitative mechanism for electrical breakdown is proposed.

show abstract

“…The electro-optic effect is well described by the change in the index ellipsoid that certain materials exhibit under application of an electric field, 18,19 …”

Section: Principle and Design Of The Sensormentioning

confidence: 99%

Intense transient electric field sensor based on the electro-optic effect of LiNbO3

et al. 2015

View full text Add to dashboard Cite

Intense transient electric field measurements are widely applied in various research areas. An optical intense E-field sensor for time-domain measurements, based on the electro-optic effect of lithium niobate, has been studied in detail. Principles and key issues in the design of the sensor are presented. The sensor is insulated, small in size (65 mm × 15 mm × 15 mm), and suitable for high-intensity (<801 kV/m) electric field measurements over a wide frequency band (10 Hz–10 MHz). The input/output characteristics of the sensor were obtained and the sensor calibrated. Finally, an application using this sensor in testing laboratory lightning impulses and in measuring transient electric fields during switch-on of a disconnector confirmed that the sensor is expected to find widespread use in transient intense electric field measurement applications.

show abstract

Optical observation of pre-breakdown and breakdown phenomena in transformer oil

Cited by 56 publications

References 11 publications

Comparison of streamer propagation in mineral oils under lightning and step impulse voltages

Comparison of streamer propagation in mineral oils under lightning and step impulse voltages

The dynamics of electrical breakdown in liquid hydrocarbons. II

Intense transient electric field sensor based on the electro-optic effect of LiNbO3

Contact Info

Product

Resources

About