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10003802
An Investigation on Hot-Spot Temperature Calculation Methods of Power Transformers
Abstract:
In the standards of IEC 60076-2 and IEC 60076-7, three different hot-spot temperature estimation methods are suggested. In this study, the algorithms which used in hot-spot temperature calculations are analyzed by comparing the algorithms with the results of an experimental set-up made by a Transformer Monitoring System (TMS) in use. In tested system, TMS uses only top oil temperature and load ratio for hot-spot temperature calculation. And also, it uses some constants from standards which are on agreed statements tables. During the tests, it came out that hot-spot temperature calculation method is just making a simple calculation and not uses significant all other variables that could affect the hot-spot temperature.
Digital Object Identifier (DOI):

References:

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[14] International Standard IEC 60076-7; "Power Transformers-Part 7: Loading guide for oil immersed power transformers";2005
[15] International Standard IEC 60076-2; "Power Transformers-Part 2: Temperature rise for liquid-immersed power transformers";2011
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