Title :
The analysis of mechanical strength of HV winding using finite element metho., Part II Mechanical stress and deformation analysi
Author :
Meng, Zhiqiang ; Wang, Zhongdong
Author_Institution :
Dept. of Electr. Eng. & Electron., Univ. of Manchester Inst. of Sci. & Technol., UK
Abstract :
Based on the electromagnetic force data from Part 1 of this study, deformation and stress analysis of discs in the HV winding is performed using the finite element method. The deformation and the von Mises equivalent stress of different discs in the HV winding are evaluated. Comparison shows that the deformation patterns between winding discs are different and the maximum equivalent stress occurs in the disc at the end of the HV winding. Since the windings endure dynamic forces during short circuit faults, the natural frequencies and the modes of HV winding under particular constraints are given by solving the generalized eigenvalue problem. The dynamic effects on winding discs are estimated.
Keywords :
deformation; eigenvalues and eigenfunctions; finite element analysis; internal stresses; power engineering computing; power system faults; power transformers; stress analysis; transformer windings; HV winding; HV winding discs; deformation analysis; deformation patterns; dynamic effects; dynamic forces; electromagnetic force data; finite element method; generalized eigenvalue problem; maximum equivalent stress; mechanical strength; mechanical stress; short circuit faults; von Mises equivalent stress; winding modes; winding natural frequencies; Circuit faults; Electromagnetic analysis; Electromagnetic forces; Finite element methods; Magnetic analysis; Magnetic forces; Performance analysis; Power transformers; Tensile stress; Vibrations;
Conference_Titel :
Universities Power Engineering Conference, 2004. UPEC 2004. 39th International
Conference_Location :
Bristol, UK
Print_ISBN :
1-86043-365-0