1. College of Electrical Engineering and Automation Fuzhou University, Fuzhou 350108; 2. Electric Power Research Institute of Fujian Electric Power Co., Ltd, Fuzhou 350007
Abstract With the increase of the power system capacity, it is necessary for the transformer windings to carry on the buckling and elastic-plastic mechanics analysis, because electrodynamic force that the short-circuit trouble produces can cause deformation of transformer windings and the problem of the stability in radial direction. The buckling and elastic-plastic mechanics of transformer windings were analyzed by ANSYS software in the medium voltage winding of the three-phase short circuit in this paper. The radial stability coefficient of the medium voltage winding was obtained by the model of 50MVA main transformer of three windings. This method has certain reference value for analysis of transformer short-circuit impact, and also has some reference significance for the design and fabrication of large transformers according to the verified accident examples.
2017, Vol. 18 
