Equivalent heat circuit based power transformer thermal model

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© IEE
Published 30/07/2012

Abstract

An equivalent heat circuit based thermal model of oil-immersed power transformers and a methodology for model construction using intelligent learning based on real-world data are presented. The proposed thermal model is established to calculate the real-time temperatures of the main parts of a natural oil, natural air (ONAN) and forced oil, forced air (OFAF) cooled power transformer, which is based on the principles of heat exchange and electric circuit laws. A genetic algorithm is used as a search method, based on a few on-site measurements, to determine the thermal model parameters.

Inspec keywords: thermal analysis; cooling; transformer oil; power transformers

Other keywords: forced air cooling; forced oil cooling; natural air cooling; genetic algorithm; power transformer thermal model; model construction; real-time temperatures natural oil; oil-immersed power transformers; natural oil cooling; equivalent heat circuit; heat exchange; search method; intelligent learning

Subjects: Organic insulation; Transformers and reactors

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