高分子绝缘材料中高场交流传导损耗电流的检测

Proceedings of the 3rd International Conference on Conduction and Breakdown in Solid Dielectrics Pub Date : 1989-07-03 DOI:10.1109/ICSD.1989.69198

T. Tokoro, M. Nagao, M. Kosaki

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引用次数: 9

摘要

提出了一种检测高分子绝缘材料中高场交流传导损耗电流的新方法。它采用电流比较器型高场tan- delta电容桥的不平衡运算和反褶积技术进行信号处理。给出了该检测系统在不同放大器增益水平下的传递函数示例。在一定条件下，用该方法计算的LDPE(低密度聚乙烯)薄膜的高场交流传导电流既包含与tan δ相关的同相基波正弦波分量，也包含由传导电流的非线性电场依赖性引起的谐波。然而，在环氧树脂中，只检测到耗散电流的基本正弦波分量。

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Detection of high field AC conduction loss current in polymeric insulating materials

A novel method for the detection of high-field AC conduction loss current in polymeric insulating materials is developed. It uses the unbalanced operation of a current-comparator-type high-field tan- delta -capacitance bridge and the deconvolution technique for signal processing. Examples of the transfer function of this detection system for different amplifier gain levels are shown. Under certain conditions, the high-field AC conduction current of LDPE (low-density polyethylene) film evaluated with this method contains both an in-phase fundamental sine wave component which correlates with tan delta and harmonics caused by the nonlinear electric-field dependence of the conduction current. In epoxy resin, however, only the fundamental sinusoidal wave component of the dissipation current is detected.<>

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Proceedings of the 3rd International Conference on Conduction and Breakdown in Solid Dielectrics

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