Title :
Effect of liquid motion on breakdown voltage under divergent electric fields in transformer oil
Author :
Hanaoka, R. ; Ishibashi, R. ; Aoyagi, T. ; Asada, Y. ; Nishi, T.
Author_Institution :
Dept. of Electr. Eng., Kanazawa Inst. of Technol., Japan
Abstract :
Conduction current and liquid motion under divergent electric fields in transformer oil were measured, and the effect of polarity on the DC breakdown voltage was clarified. Electric field and space charge density distributions near the breakdown were computed, taking the liquid motion into account. It was deduced that the breakdown occurred due to the field enhancement in front of the plane electrode, and it was demonstrated that the breakdown voltage in the case of the negative sharp electrode was much higher than in the case of the positive one
Keywords :
electric breakdown of liquids; insulating oils; space charge; transformer insulation; DC breakdown; breakdown voltage; conduction current; divergent electric fields; field enhancement; liquid motion; negative sharp electrode; polarity; space charge density; transformer oil; Blades; Breakdown voltage; Current measurement; Electrodes; Geometry; Motion measurement; Needles; Oil insulation; Space charge; Space technology;
Conference_Titel :
Conduction and Breakdown in Dielectric Liquids, 1990. ICDL 1990. Conference Record., 10th International Conference on
Conference_Location :
Grenoble
DOI :
10.1109/ICDL.1990.202911
