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

fYear

2010

fDate

25-27 June 2010

Firstpage

4235

Lastpage

4238

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical and Control Engineering (ICECE), 2010 International Conference on

Conference_Location

Wuhan

Print_ISBN

978-1-4244-6880-5

Type

conf

DOI

10.1109/iCECE.2010.1029

Filename

5629637