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Title: Characterization of degraded oil impregnated paper under transient overvoltages
Researcher: Bavisha T
Guide(s): Usa S
Keywords: Degraded Oil
Engineering and Technology,Engineering,Engineering Electrical and Electronic
High Voltage
Impregnated Paper
University: Anna University
Completed Date: 2018
Abstract: With recent advancements in Ultra High Voltage transmission systems, Gas Insulated Substations and Distributed Generation systems, there is an increasing concern towards a reliable power system for which good newlineinsulation coordination is essential. Voltage-time characteristics form the newlinebasis of insulation coordination. During insulation coordination, sufficient newlinesafety and protective margins are established between the voltage-time newlinecharacteristics of the equipment to be protected and the protective level of the newlineprotective device.Power transformer is the crucial equipment in the power system. newlineEven after proper insulation coordination, significant number of transformer newlinefailures are reported due to degradation of its insulation caused by service newlineaging and transient overvoltages. Among the transformer failures, winding newlineinsulation related failures are predominant. In the winding, inter-turn newlineinsulation is exposed to maximum electrical stress under transient newlineovervoltages compared to other winding insulation. Oil Impregnated Paper is newlinethe commonly used inter-turn insulation and the service life of the entire newlinetransformer depends upon the paper-oil quality.During service aging, Oil Impregnated Paper undergoes degradation due to thermal, dielectric, chemical and mechanical stresses.Degradation also occurs, when transformers are subjected to various types of newlinetransient overvoltages like lightning and switching overvoltages. In addition, newlinetransformers encounter. newline newline
Pagination: xxvi, 171p.
Appears in Departments:Faculty of Electrical Engineering

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01_title.pdfAttached File68.11 kBAdobe PDFView/Open
02_certificate.pdf354.06 kBAdobe PDFView/Open
03_abstract.pdf54.31 kBAdobe PDFView/Open
04_acknowledgment.pdf48.74 kBAdobe PDFView/Open
05_contents.pdf165.69 kBAdobe PDFView/Open
06_chapter1.pdf702.27 kBAdobe PDFView/Open
07_chapter2.pdf934.88 kBAdobe PDFView/Open
08_chapter3.pdf510.71 kBAdobe PDFView/Open
09_chapter4.pdf688.58 kBAdobe PDFView/Open
10_chapter5.pdf1.19 MBAdobe PDFView/Open
11_conclusion.pdf220.75 kBAdobe PDFView/Open
12_chapter7.pdf127.29 kBAdobe PDFView/Open
13_references.pdf240.88 kBAdobe PDFView/Open
14_publications.pdf148.84 kBAdobe PDFView/Open

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