Open AccessBook
Large Power Transformers
K. Karsai,D. Kerényi,László Kiss +2 more
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TLDR
In this paper, the physical background of Transformer operation is discussed, including the core, the windings, and the insulation of the Transformer's structural parts, as well as the temperature rise and cooling of Transformers.Abstract:
1. The Physical Background of Transformer Operation. 2. The Core. 3. The Windings. 4. Stray-Field Losses in Structural Parts of Transformers. 5. Transformer Insulation. 6. Temperature Rise and Cooling of Transformers. 7. Constructional Parts of the Transformer. Subject Index.read more
Citations
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Journal ArticleDOI
Dynamic thermal modelling of power transformers
TL;DR: In this article, the authors introduce hot-spot and top-oil temperature thermal models for more accurate temperature calculations during transient states based on data received in a normal heat run test (i.e., the top oil in the tank of the transformer and the average winding-to-average oil gradient).
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Transformer tank vibration modeling as a method of detecting winding deformations-part I: theoretical foundation
TL;DR: In this article, a model developed for a transformer monitoring system to estimate transformer tank vibration is presented, which takes into account the main physical phenomena generating vibrations in the different transformer elements and how these vibrations are superposed and transmitted to the tank.
Journal ArticleDOI
Effect of supply voltage frequency on testing of insulation system
TL;DR: In this article, the effect of supply frequency on partial discharge phenomena is investigated. But the results of measurements performed on artificial and practical test objects are compared with computer simulations based on physical models.
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Dynamic thermal modeling of power transformers: further Development-part II
D. Susa,Matti Lehtonen +1 more
TL;DR: In this article, the authors present new temperature calculation methods based on heat transfer theory, the application of the lumped capacitance method, the thermal-electrical analogy, and a new definition of nonlinear thermal resistances at different locations within a power transformer.
Journal ArticleDOI
Transformer design and application considerations for nonsinusoidal load currents
TL;DR: In this article, the Underwriters Laboratories Inc. (UL) K-factor rated dry type transformer and the recommended practices given in ANSI/IEEE C57.110 are reviewed.