文章基本信息

标题：Power Transformer Winding Fault Detection based on SFRA
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作者：Alberto Avalos ; Jaime Cerda
期刊名称：Lecture Notes in Engineering and Computer Science
印刷版ISSN：2078-0958
电子版ISSN：2078-0966
出版年度：2018
卷号：2237&2238
页码：258-262
出版社：Newswood and International Association of Engineers
摘要：Dispersion and Sweep Reactance in the Frequency, in this work, results of transformer diagnostics are shown where both conventional and non-conventional tests become complementary, allowing the identification of the fault only by those tests that are able to excite said failure. Emphasis will be placed on the effectiveness of the frequency sweep test for fault modes that most other tests fail to excite. These types of faults will be those reflecting a change in the geometric structure of the transformer due to mechanical movements in the windings and / or core of the transformer. The detection of incipient failures in power transformers requires a meticulous analysis of the results obtained in conventional tests such as low voltage TTR, excitation current and power factor. However certain faults are not excitable by this set of conventional tests and therefore being necessary to perform additional unconventional tests such as: TTR in high voltage, Dispersion Reactance and Sweep Frequency Response. In this work, results of transformer diagnostics are shown where both conventional and non-conventional tests become complementary, allowing the identification of the fault only by those tests that are able to excite such failure. Emphasis will be placed on the effectiveness of the sweep frequency response test for failure modes that most other tests fail to excite. These types of failures will be those that reflect a change in the geometric structure of the transformer due to mechanical movements in the windings and / or core of the transformer.
关键词：Power Transformer; SFRA; Fault; Diagnostics; TTR.