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1988•Journal of Physics D Applied PhysicsOpen access

The influence of electrohydrodynamic motion on the breakdown of dielectric liquids

G. Theodossiou, J.K. Nelson, M J Lee, Garrett M. Odell

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Abstract

A mathematical model for the transient electrohydrodynamic (EHD) motion in liquid dielectrics is used to examine the behaviour of dielectric fluids flowing at various velocities between high-voltage electrodes. The resulting flow patterns and space charge distribution profiles are correlated with observed variations in transformer-oil breakdown properties, and explanations for these variations are proposed.

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A mathematical model for the transient electrohydrodynamic (EHD) motion in liquid dielectrics is used to examine the behaviour of dielectric fluids flowing at various velocities between high-voltage electrodes. The resulting flow patterns and space charge distribution profiles are correlated with observed variations in transformer-oil breakdown properties, and explanations for these variations are proposed.

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Available abstract

A mathematical model for the transient electrohydrodynamic (EHD) motion in liquid dielectrics is used to examine the behaviour of dielectric fluids flowing at various velocities between high-voltage electrodes. The resulting flow patterns and space charge distribution profiles are correlated with observed variations in transformer-oil breakdown properties, and explanations for these variations are proposed.

Key concepts: Electrohydrodynamics, Liquid dielectric, Transformer oil, Dielectric, Mechanics, Space charge, Breakdown voltage, Electrode

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