| 초록 |
Fractal characteristics of electrical treeing deterioration phenomena in XLPE insulationof power distribution cable in time and space domain were investigated. Blocksofneedle-plane electrode geometry of XLPE insulation in power distribution 22.9 kV CN/CVcable were electrically stressed under 7.5 kV of 60 Hz at 25℃. Fractal parameters wereobtained by scale covering method. All the tree showed fractal characteristics. The fractalparameter in time and space domain were 2.05 and 1.31. As the voltage applying timeincreased, the values were saturated. The fractal dimension was increased and saturated to1.4 regardless of voltage applying time.
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