基于变压器绕组中谐振过电压识别的传输函数(英文)

被引：1

作者：

MFlorkowski ^{[1
]}

JFurga ^{[2
]}

机构：

[1] ABB Corporate Research,ulStarowis' lna A,- Kraków,Poland

[2] AGH University of Science and Technology,Department of Electrical Engineering and Electrical Power,alMickiewicza ,- Kraków,Poland

来源：

高电压技术 | 2008年 / 34卷 / 12期

关键词：

D O I：

暂无

中图分类号：

TM86 [过电压及其防护];

学科分类号：

080803 [高电压与绝缘技术];

摘要：

Power transformer insulation systems are subjected to many stresses during normal operation due to lightning and switching.If the spectrum of incoming surge voltage matches the winding one,the corresponding resonance will be excited.Therefore external transients occurring in power systems might trigger internal overvoltages with large maximum value in transformer windings.Overvoltages having such characteristic have been the root cause of many power transformer failures.The paper presents an approach to the identification of sensitive zones in the transformer windings based on the measurements of overvoltages inside windings and frequency dependences of admittance of the power transformer.The frequency characteristic of the transformer winding may determine those regions in the frequency spectrum.The presented approach might be used both for design optimization and diagnostics of distribution and power transformers.

引用

页码：2558 / 2563

页数：6