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

Ruohan Gong, Jiangjun Ruan, Jingzhou Chen, Yu Quan, Jian Wang and Cihan Duan
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Ruohan Gong: School of Electrical Engineering, Wuhan University, No. 8, South Road of Eastern Lake, Wuhan 430072, China
Jiangjun Ruan: School of Electrical Engineering, Wuhan University, No. 8, South Road of Eastern Lake, Wuhan 430072, China
Jingzhou Chen: School of Electrical Engineering, Wuhan University, No. 8, South Road of Eastern Lake, Wuhan 430072, China
Yu Quan: School of Electrical Engineering, Wuhan University, No. 8, South Road of Eastern Lake, Wuhan 430072, China
Jian Wang: School of Electrical Engineering, Wuhan University, No. 8, South Road of Eastern Lake, Wuhan 430072, China
Cihan Duan: School of Electrical Engineering, Wuhan University, No. 8, South Road of Eastern Lake, Wuhan 430072, China

Energies, 2017, vol. 10, issue 8, 1-12

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.

Keywords: fluid-thermal coupled analysis; finite volume method (FVM); temperature rise; oil natural air natural (ONAN) transformer; fiber Brag grating (FBG) sensor (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (6)

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