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Research Papers

Numerical Analysis of Transient Temperature Distribution Inside a Current Transformer

[+] Author and Article Information
Jie Cui, Mahesh Nadkarni

Department of Mechanical Engineering, Tennessee Technological University, Cookeville, TN 38505

Satish M. Mahajan, Diego M. Robalino

Department of Electrical and Computer Engineering, Tennessee Technological University, Cookeville, TN 38505

J. Thermal Sci. Eng. Appl 2(3), 031005 (Dec 16, 2010) (6 pages) doi:10.1115/1.4003068 History: Received October 20, 2010; Revised November 11, 2010; Published December 16, 2010; Online December 16, 2010

Current transformer (CT) is a device that transfers the electrical energy from one circuit to another through a shared magnetic field. In a CT, heat is generated in the core, tank wall, and primary and secondary windings. The performance of a CT is well indicated by the temperature distribution inside it. In this study, numerical analysis was performed to predict the temperature distribution inside the CT at every instant under different load conditions. It was found that the numerical results obtained were in good agreement with the experimental measurements. Thus, it was concluded that the numerical method can be a useful tool in CT design and performance monitoring.

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Copyright © 2010 by American Society of Mechanical Engineers
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Figures

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Figure 1

Actual test conditions in TTU HV Laboratory

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Figure 2

The geometry of CT for numerical simulation

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Figure 3

Computational mesh of the CT used in the numerical simulation

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Figure 4

Comparison of the measured and computed temperatures at TC1, TC2, and TOT for the warm-up case (lines: measured data; symbols: simulation results)

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Figure 5

Temperature contours (in °C) on two midplanes (xy and yz) inside the CT

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Figure 6

Comparison of the measured and computed temperatures at TC1, TC2, and TOT for test 2 (lines: measured data; symbols: simulation results)

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