Electromagnetic and thermal parameter identification method for best prediction of temperature distribution on transformer tank covers. Issue 2 (2nd March 2015)

• Record Type: Journal Article
• Authors: Slawomir Wiak, Professor; Penabad Durán, Patricia; Di Barba, Paolo; Lopez-Fernandez, Xose; Turowski, Janusz
• Is Part Of: Compel. Volume 34:Issue 2(2015)
• Page Start: 485
• Page End: 495
• Publication Date: 2015-03-02
• Subjects: Electrical engineering -- Data Processing -- Periodicals; Electrical engineering -- Mathematics -- Periodicals; Electrical engineering -- Periodicals; Electronics -- Data Processing -- Periodicals; Electronics -- Mathematics -- Periodicals; 621.3
• DOI: 10.1108/COMPEL-08-2014-0217
• Languages: English
• ISSNs: 0332-1649

Abstract

<abstract> <title> <x content-type="archive" xml:space="preserve">Abstract</x> </title> <sec> <title content-type="abstract-heading">Purpose</title> <p> – The purpose of this paper is to describe a parameter identification method based on multiobjective (MO) deterministic and non-deterministic optimization algorithms to compute the temperature distribution on transformer tank covers. </p> </sec> <sec> <title content-type="abstract-heading">Design/methodology/approach</title> <p> – The strategy for implementing the parameter identification process consists of three main steps. The first step is to define the most appropriate objective function and the identification problem is solved for the chosen parameters using single-objective (SO) optimization algorithms. Then sensitivity to measurement error of the computational model is assessed and finally it is included as an additional objective function, making the identification problem a MO one. </p> </sec> <sec> <title content-type="abstract-heading">Findings</title> <p> – Computations with identified/optimal parameters yield accurate results for a wide range of current values and different conductor arrangements. From the numerical solution of the temperature field, decisions on dimensions and materials can be taken to avoid overheating on transformer covers. </p> </sec> <sec> <title content-type="abstract-heading">Research limitations/implications</title> <p> – The accuracy of the model depends on its parameters, such as heat exchange coefficients and material properties, which are difficult to determine from formulae or from the literature. Thus the goal of the presented technique is to achieve the best possible agreement between measured and numerically calculated temperature values. </p> </sec> <sec> <title content-type="abstract-heading">Originality/value</title> <p> – Differing from previous works found in the literature, sensitivity to measurement error is considered in the parameter identification technique as an additional objective function. Thus, solutions less sensitive to measurement errors at the expenses of a degradation in accuracy are identified by means of MO optimization algorithms.</p> </sec> </abstract>