Proceedings ArticleDOI
Electrode area and stressed volume: Two apparent effects of large-volume oil insulation
N. Giao Trinh,C. Vincent,Jacques Regis +2 more
- pp 115-118
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TLDR
In this article, a semi-empirical method was developed for quantitative evaluation of the dielectric degradation of large-oil-volume insulation, assuming an apparent effect with a unit element of known breakdown probability distribution.Abstract:
Analysis of the dielectric degradation observed in large-volume oil insulation revealed that the phenomenon can be interpreted in terms of an apparent effect of either the electrode area or the stressed volume. A semi-empirical method was developed for quantitative evaluation of the dielectric degradation of large-oil-volume insulation. The method applies the weak-link theory to an oil gap, assuming an apparent effect with a unit element of known breakdown probability distribution determined from experimental data.read more
Citations
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Journal ArticleDOI
Understanding Corona discharge activity in titania nanoparticles dispersed in transformer oil under AC and DC voltages
TL;DR: In this paper, the volume of nanoparticles and the amount of surfactant have a strong influence on the dispersion of nano-articles in transformer oil and were characterized through viscosity measurement, particle size analysis and by zeta potential measurements.
Journal ArticleDOI
Impulse electrical breakdown of liquid hydrocarbons. Dynamics of phenomena with increasing voltage amplitude and decreasing of nonuniformity field. Prediction of the liquid breakdown voltage
TL;DR: In this paper, the authors studied the leader process in mineral oil and found structural elements and systematic features of the leader propagation, new explanations of the physical nature of some empirical dependences were proposed, and the possibility of predicting the liquid breakdown voltage on the basis of characteristics of predischarge phenomena was shown.
Journal ArticleDOI
Dealing with the Size Effect in Insulating Liquids. A Volume Effect, an Area Effect or even a Particle Effect? A Concise Review
TL;DR: In this article, the effect of the size of the electrodes, of the liquid volume under stress and of the gap spacing between the electrodes is investigated in the context of the present short review.
References
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Journal ArticleDOI
Area Effect and Its Extremal Basis for the Electric Breakdown of Transformer Oil [includes discussion]
K. H. Weber,H. S. Endicott +1 more
Journal ArticleDOI
A Fundamental Factor Controlling the Unit Dielectric Strength of Oil [includes discussion]
Journal ArticleDOI
Breakdown of Transformer Oil
Y. Kawaguchi,H. Murata,M. Ikeda +2 more
TL;DR: In this paper, the authors tried to express the breakdown stress of transformer oil as a function of stressed oil volume, but their results were limited to their respective electrodes, and the latters made it difficult to predict break-down voltage from electrostatic field, as made for air and S F6 gaps.
Journal ArticleDOI
Electric strength of transformer oil for large electrode areas
TL;DR: In this article, the effects of temperature, forced oil motion and the nature of gas in solution are studied, and it is concluded that the oil flow is an important parameter in determining the statistical distribution of breakdown measurements.
Proceedings ArticleDOI
Effect of impurity particles on transformer oil under normal operating conditions
TL;DR: In this paper, a systematic survey was conducted of transformer oil samples taken from operating transformers and reactors used in Hydro-Quebec's transmission system, and it was found that the particle content in the oil follows a distribution of the power function type and that it can be related to the dielectric strength of the oil.