Fractal-like charge injection kinetics in transformer oil stressed by high-voltage pulses

被引：9

作者：

Zhang, X. ^{[1
]}

Zahn, M. ^{[1
]}

机构：

[1] MIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA

来源：

APPLIED PHYSICS LETTERS | 2014年 / 104卷 / 16期

关键词：

FIELD; CONDUCTION; DISSOCIATION; SURFACES;

D O I：

10.1063/1.4873341

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Kerr electro-optic measurements are taken to study the transient electrode charge injection in high voltage pulsed transformer oil. It is found that the injection current densities from two stainless-steel parallel-plate electrodes with distinct surface roughness display fractal-like kinetics, i.e., power-law time dependence. Our measurement data agree with numerical simulation results of the time-dependent drift-diffusion model with the experimentally determined injection current boundary conditions. The fractal-like kinetics implies that the electric double layer processes contributing to injection are diffusion-limited. Physical mechanisms based on formative steps of adsorption-reaction-desorption reveal possible connections between geometrical characteristics of electrode surfaces and fractal-like kinetics of charge injection. (C) 2014 AIP Publishing LLC.

引用

页数：5

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