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In a negative-needle to plane configuration in transformer oil and liquid nitrogen (LN2), current-voltage (I–V) characteristics and liquid velocities were measured. Well-known linear plots of V vs I1/2 were obtained in the space charge limitation (SCL) for I>10−9 A. The liquid motion in SCL is computed from both the Navier-Stokes equation and the continuity equation by the finite difference method...
The knowledge of the local electrical field in the immediate vicinity of the electrode surface is very desirable if one were to understand the charge injection process at an electrode. Many attempts have been made to determine this local field experimentally.[1,3] None of these attempts has so far succeeded in estimating the field in front of the primary streamer which is formed as a result of the...
These two new experiments bring us more information about the behaviour of liquid dielectrics. We intend to develop them by studying more liquids and by analysing more precisely the main characters affecting the partial discharges.
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