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A vibration analysis of cable-type winding for distribution power transformer by using a semi-analytic method

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4 Author(s)

This paper proposes a simulation method of the internal winding fault to calculate the short-circuit current, electromagnetic force and vibration mode in a distribution power transformer by suing FEM and analytic algorithm. A usage of the pseudospectral method is also presented for the vibration analysis of the winding during the short-circuit. The equations of the winding are approximated by the series expansions of Chebyshev polynomials and the Gauss-Lobatto collocation process is performed. The simulation examples are provided for the cable type winding of the transformer(22.9 kV/220 V, 1000 kVA) to verify the method. The simulation results are in good agreement with FEM solutions and analytical methods.

Published in:

Electrical Machines and Systems, 2007. ICEMS. International Conference on

Date of Conference:

8-11 Oct. 2007