Evolution of the streaming current generated by an oil flow through a pressboard-application to flow electrification in power transformers

Moreau, Éric; Paillat, T.; Touchard, G.

doi:10.1109/ceidp.1997.641168

Cited by 6 publications

(2 citation statements)

References 7 publications

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“…During the operational life of a transformer, its insulation experiences different stresses [1][2][3][4][5][6][7] which reduce its desirable properties and change the relaxation characteristics of dipole groups present therein. This affects the profile of the measured dielectric response in time and frequency domain.…”

Section: Introductionmentioning

confidence: 99%

Compensating the effect of residual dipole energy on dielectric response for effective diagnosis of power transformer insulation

Mishra

Baral

Chakravorti³

2018

IET Science, Measurement & Technology

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Section: Introductionmentioning

confidence: 99%

Compensating the effect of residual dipole energy on dielectric response for effective diagnosis of power transformer insulation

Mishra

Baral

Chakravorti³

2018

IET Science, Measurement & Technology

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“…The results showed that the space charge density was multiplied by three or four when the pressboard had been degraded by electrical discharges. This conclusion was alarming because it seemed that a chain reaction might happen inside the power transformer, until its failure [11]. …”

Section: Introductionmentioning

confidence: 99%

“Capacitive Sensor” to Measure Flow Electrification and Prevent Electrostatic Hazards

Paillat

Touchard

Bertrand

2012

Sensors

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At a solid/liquid interface, physico-chemical phenomena occur that lead to the separation of electrical charges, establishing a zone called electrical double layer. The convection of one part of these charges by the liquid flow is the cause of the flow electrification phenomenon which is suspected of being responsible of incidents in the industry. The P' Institute of Poitiers University and CNRS has developed an original sensor called “capacitive sensor” that allows the characterization of the mechanisms involved in the generation, accumulation and transfer of charges. As an example, this sensor included in the design of high power transformers, could easily show the evolution of electrostatic charge generation developed during the operating time of the transformer and, therefore, point out the operations leading to electrostatic hazards and, then, monitor the transformer to prevent such risks.

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Influence of additives and pressboard degradation on flow electrification in high power transformers

Paillat

Moreau²,

Touchard³

1998 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.98CH36257)

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Evolution of the streaming current generated by an oil flow through a pressboard-application to flow electrification in power transformers

Cited by 6 publications

References 7 publications

Compensating the effect of residual dipole energy on dielectric response for effective diagnosis of power transformer insulation

Compensating the effect of residual dipole energy on dielectric response for effective diagnosis of power transformer insulation

“Capacitive Sensor” to Measure Flow Electrification and Prevent Electrostatic Hazards

Influence of additives and pressboard degradation on flow electrification in high power transformers

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