High Voltage Conduction & Breakdown Phenomena in Dielectrics

[220638] Zahn提议的研究是继续研究液体、气体和固体电介质中的高压绝缘、传导和击穿特性。电力设备（如变压器和电缆）和脉冲电源技术（如马克思发生器和脉冲形成线）中使用的绝缘介质的性能受到注入空间电荷和绝缘表面电荷积累的影响。这种电荷扭曲了电场分布，并引入了电极之间的电荷迁移时间，作为通常的介电弛豫和流体传输时间的附加时间常数。通过Kerr电光场和电荷映射测量、电压电流终端测量和电气击穿测试来测量高压应力电极的电荷注入。注入电荷的大小和极性以及电击穿强度在很大程度上取决于电极材料组合和电压极性。本研究试图了解高场应力气体、液体和固体介质中的传导、老化、降解和击穿机制，使用新的现代光学、电子和计算机仪器，让我们看到以前无法看到的材料内部的电荷输运效应。通过使用新开发的传感器来连续监测液体和固体的电导率、介电常数、湿度和体积电荷密度，这些测量方法得到了改进，以便知道必要的参数值，以便在理论和实验之间进行比较。电荷输运理论也将用于分析其他电声方法测量的空间电荷分布的已发表的实验结果。*** v st 9220638 Zahn提出的研究是对高压绝缘的继续研究，传导和击穿特性} n s$ $ $ (F / s s / 1信使符号& & & Arial 5 Courier New X X " h % % I R:\WW20USER\ABSTRACT。卡桑德拉·奎恩卡桑德拉·奎恩

9220638 Zahn The proposed research is the continued study of high voltage insulation, conduction and breakdown characteristics in liquid, gaseous and solid dielectrics. Insulating dielectrics used in power apparatus, such as transformers and cables, and in the pulse power technology, such as Marx generators and pulse forming lines, have their performance affected by injected space charge and by surface charge accumulation on insulating surfaces. This charge distorts the electric field distribution and introduces the charge migration time between electrodes as an additional time constant over the usual dielectric relaxation and fluid transport times. Charge injection from high voltage stressed electrodes are measured by Kerr electro-optic field and charge mapping measurements, voltage-current terminal measurements, and electrical breakdown tests. The magnitude and polarity of injected charge and the electrical breakdown strength deped strongly on electrode material combinations and voltage polarity. The research tries to understand conduction, aging, degradation, and breakdown mechanisms in high field stressed gaseous, liquid, and solid dielectris using new modern optical, electronic, and computer instrumentation to give us eyes to see charge transport effects inside materials that could not be seen before. These measurements are improved by also using newly developed sensors to continuously monitor liquid and solid conductivity, permittivity, moisture, and volume charge densities so that necessary parameter values are known to allow comparison between theory and experiment. Charge transport theory will also be used to analyze published experimental results of others of space charge distributions measured with electro-acousitc methods. *** v s t 9220638 Zahn The proposed research is the continued study of high voltage insulation, conduction and breakdown characteristics s } n s $ $ $ ( F / s s / 1 Courier Symbol & Arial 5 Courier New X X " h % % I R:\WW20USER\ABSTRACT.DOT Cassandra Queen Cassandra Queen