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The power transformer heating must be monitored for avoiding fast ageing of insulation of impregnated paper and, consequently, transformer's premature depreciation. This paper describes the development and the implementation of a thermal model able to calculate the internal temperatures in power transformers using numerical simulations to obtain an online model for estimating hotspot temperatures. In order to validate the proposed procedure, a comparison between numerical results and direct measurement in the power transformer is presented.
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Silva et al. (2017) studied this question.
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