Transformer inter-turn short circuit modeling and its application

Aiming at transformer inter-turn short problem, this paper presents an idea which is equivalent the shorted winding to two different windings. The modeling of equivalence is proposed with the low voltage side inter-turn short of three windings as an example. First, the shorted three-winding transfor...

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Bibliographic Details
Published inDianli Xitong Baohu yu Kongzhi Vol. 42; no. 8; pp. 140 - 145
Main Authors Yang, Li-Cai, Sun, Jie-Zhong, Liu, Wei, Zhou, Wei, Qin, Kai
Format Journal Article
LanguageChinese
Published 16.04.2014
Subjects
Computer simulation
Equivalence
Low voltage
Mathematical models
Matlab
Short circuits
Transformers
Winding
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Summary:Aiming at transformer inter-turn short problem, this paper presents an idea which is equivalent the shorted winding to two different windings. The modeling of equivalence is proposed with the low voltage side inter-turn short of three windings as an example. First, the shorted three-winding transformer is equivalent to a four-winding transformer. Then a formula in the middle and low voltage sides is derived, according to which shorted information is calculated and the decrease of middle and low voltage sides is deduced and the latter decreases more seriously. The model is applied successfully to the simulation and analysis of the Guangxi power grid 220 kV transformer inter-turn short circuit by MATLAB, the simulation curve and result of analysis are coincide with examination results and recorded curve, which verify the correctness of the model.
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ISSN:1674-3415