Journal ArticleDOI
Cellulose insulation in oil-filled power transformers: Part I - history and development
T.A. Prevost,T.V. Oommen +1 more
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A brief discussion on the development of electrical grade paper/pressboard for transformer use from the raw materials, improvements made, and particularly the use of thermal upgrading agents to extend the useful life of transformers is presented in this article.Abstract:
This paper presents a brief discussion on the development of electrical grade paper/pressboard for transformer use from the raw materials, improvements made, and particularly the use of thermal upgrading agents to extend the useful life of transformersread more
Citations
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Journal ArticleDOI
Protocol for characterizing the molar mass distribution and oxidized functionality profiles of aged transformer papers by gel permeation chromatography (GPC)
Paul Jusner,Florian Bausch,Sonja Schiehser,Elisabeth Schwaiger,Antje Potthast,Thomas Rosenau +5 more
TL;DR: In this paper , the authors applied and optimized more advanced methods for the characterization of cellulosic materials based on gel permeation chromatography for the special case of thermally stressed unbleached Kraft paper samples.
Proceedings ArticleDOI
Moisture and temperature effects on conduction and losses in modified rape-seed insulating oil
TL;DR: In this paper, the authors have investigated the dielectric properties (losses, conductivity) of a modified rape-seed oil (RS50) over a wide frequency range (10-2-106Hz) and conductivity measurements according to CEI 61620 standard.
Journal ArticleDOI
Enhanced optimal trained hybrid classifiers for aging assessment of power transformer insulation oil
TL;DR: This is the first work uses RM-LA-based optimization for aging assessment in power transformation insulation oil and deploys a hybrid classifier model by merging the neural network (NN) and deep belief network (DBN).
Journal ArticleDOI
Study on the suitability of bamboo fiber for manufacturing insulating presspaper
TL;DR: In this article, the tensile strength of softwood presspaper can be reinforced by introduction of bamboo fibers with a concentration ranging from 10 wt. % to 50 wt %.
Proceedings ArticleDOI
The experimental investigation on space charge distribution of cellulose insulation paper modified with alumina nanoparticles
TL;DR: In this paper, the influence of nanoparticles on space charge distribution through using alumina nanoparticles to reinforce ordinary cellulose insulation paper was investigated, and the experimental results showed that adding nanoparticles can inhibit the injection, migration and accumulation of space charge in dielectric, making the space charges distribution more uniform in insulation paper.
References
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Journal ArticleDOI
Evaluation of the Thermal Stability of Electrical Insulating Paper
TL;DR: In this article, a laboratory method for evaluating the thermal stability of chemically treated insulating paper is presented that measures the performance at various stages of deterioration, makes direct numerical comparisons, and can be used to establish specifications for the treated paper used to build 65°C-rise transformers.
Journal ArticleDOI
History of Transformers
TL;DR: In this paper, the basic elements of transformers, including two independent coils and a closed iron core, are described and compared to the transformer energy distribution networks that are used today, from experimental devices of the 1830s to the first transformer systems of the 1880s.
Journal ArticleDOI
A Century of Progress in Electrical Insulation 1886-1986
TL;DR: In this article, a 100-year review examines the development of electrical insulation subdivided into materials, test methods and standards, and concludes that electrical insulation can be classified into three categories:
Journal ArticleDOI
Transformer Invented 75 Years Ago
A. A. Halacsy,G. H. von Fuchs +1 more
TL;DR: A brief history of the early days of the transformer's development is presented in this paper, where the first commercial installation of a transformer was celebrated 75 years ago, and the first transformer was installed in a commercial building.
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Review of chemical indicators of degradation of cellulosic electrical paper insulation in oil-filled transformers
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