Return voltage measurements Diagnostic interpretations based on the dielectric time constants

被引：0

作者：

Patsch, R. ^{[1
]}

Kamenka, D. ^{[1
]}

Menzel, J. ^{[1
]}

机构：

[1] Univ Siegen, Inst Mat & Diagnost Elect Engn, D-57068 Siegen, Germany

来源：

MATERIALS SCIENCE-POLAND | 2009年 / 27卷 / 04期

关键词：

return voltage; paper-oil insulation; boundary polarization; ageing; Maxwell model; dielectric time constants; HV POWER EQUIPMENT; FREQUENCY-DOMAIN; SPECTROSCOPY;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Return voltage measurements of paper-oil insulations such as medium voltage cables have proven to be a reliable method to determine the actual state of degradation and/or the humidity of the insulation. As a first step, the interpretation of the measurements can be done based on the p-factor. This parameter is sensitive to the dielectric properties and especially the humidity of the solid part of the insulation, whereby aged or humid cables show a higher p-factor. The calculation of the dielectric time constants tau(1) and tau(2) of the two insulating materials oil and cellulose is unique for the return voltage method and hence exceeds the information extractable from other diagnostic methods.

引用

页码：1157 / 1169

页数：13