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Energies 2017, 10(8), 1079; doi:10.3390/en10081079

Analysis and Experiment of Hot-Spot Temperature Rise of 110 kV Three-Phase Three-Limb Transformer

School of Electrical Engineering, Wuhan University, No. 8, South Road of Eastern Lake, Wuhan 430072, China
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Received: 28 June 2017 / Revised: 15 July 2017 / Accepted: 18 July 2017 / Published: 25 July 2017
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Abstract

This paper presents a fluid-thermal coupled analysis method to compute the temperature distribution in a 31.5 MVA/110 kV oil natural air natural (ONAN) three-phase three-limb transformer. The power losses of windings and core are measured by load-loss test and no-load test respectively. The convective heat transfer process, radiation and oil flow inside the transformer are investigated by finite volume method (FVM). In order to validate the feasibility and accuracy of the presented method, the temperature measuring system based on fiber Brag grating (FBG) sensor is constructed for the temperature rise test of the 31.5 MVA/110 kV ONAN transformer. The simulation results deduced from the proposed method agree well with experimental data. This model can be applied to optimizing design and load scheduling. View Full-Text
Keywords: fluid-thermal coupled analysis; finite volume method (FVM); temperature rise; oil natural air natural (ONAN) transformer; fiber Brag grating (FBG) sensor fluid-thermal coupled analysis; finite volume method (FVM); temperature rise; oil natural air natural (ONAN) transformer; fiber Brag grating (FBG) sensor
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Gong, R.; Ruan, J.; Chen, J.; Quan, Y.; Wang, J.; Duan, C. Analysis and Experiment of Hot-Spot Temperature Rise of 110 kV Three-Phase Three-Limb Transformer. Energies 2017, 10, 1079.

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