Title :
Stability Analysis of Large Transformer Windings
Author :
Zhu, Weilu ; Yan, Caihong ; Zhao, Lanying
Author_Institution :
Sch. of Electr. Eng. & Inf. Sci., Hebei Univ. of Sci. & Technol., Shijiazhuang, China
Abstract :
By analyzing the transient short-circuit current and leakage magnetic field in a transformer, it is proposed that the axial short-circuit electric force is a dynamic one. In order to give the force effect on the windings, clamps and pressboards, a mass-spring vibrating system is used as a model for study. The theoretical analysis is verified by simulation using MATLAB. Preventive measures are proposed based on the discussion of reasons for the axial instability in transformers.
Keywords :
magnetic leakage; short-circuit currents; stability; transformer windings; MATLAB simulation; axial instability; axial short-circuit electric force; clamps; large transformer windings; leakage magnetic field; mass-spring vibrating system; pressboards; stability analysis; transient short-circuit current analysis; Electrodynamics; Force; Magnetic fields; Power transformer insulation; Windings; axial displacement; electrodynamic force; radial leakage magnetic field; short-circuit current; spring vibrating system of particle; transformer;
Conference_Titel :
Electrical and Control Engineering (ICECE), 2010 International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-6880-5
DOI :
10.1109/iCECE.2010.1029
