大型自耦变压器低压绕组辐向非线性屈曲分析

Radial nonlinear buckling analysis of low-voltage winding for large-scale autotransformer

基于"场-路"耦合方法,运用有限元软件计算低压绕组辐向短路电动力。建立低压绕组的力学模型,在绕组承受辐向短路电动力情况下,分别对变压器低压绕组撑条不同支撑时进行线性屈曲临界载荷的分析,并以线性屈曲结果为初始缺陷进行更精确的非线性屈曲分析。分析结果表明,非线性屈曲分析更能接近真实情况。

This paper calculates, based on field-circuit coupling method, radial short-circuit electromotive force of low voltage winding with the application of infinite element software, establishes mechanical model of low voltage winding,and makes linear buckling critical load analysis of transformer low-voltage winding supporting profiles under the condition of radial short-circuit electromotive force, with the result of which as initial defect more accurate nonlinear buckling analysis is made. The analysis result shows that nonlinear buckling analysis is closer to the real situation.