Open AccessResearch on transformer winding for deformation fault diagnosis based on K ‐fault diagnosis method
Author(s) -
Lin Junjie,
Chen Huizhe,
Gao Xinyue
Publication year - 2017
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2017.0750
Subject(s) - transformer , electromagnetic coil , fault (geology) , autotransformer , current transformer , finite element method , engineering , voltage , computer science , structural engineering , electrical engineering , distribution transformer , geology , seismology
Transformer is a vital power equipment to pass and transform energy in power system. Here, K ‐fault diagnosis method is presented as a new preventive way to detect radial displacement of transformer windings when it is unable to move the cover of the transformer. With the aid of ANSOFT MAXWELL simulation platform, three‐dimensional (3D) simulation model for the test high‐voltage winding consisted of 14 discs with 18 turns per disc has been built firstly. Parameters of components in ladder equivalent model of transformer winding can be calculated by using 3D finite‐element method. Both establishing ladder equivalent circuit model and acquiring FRA curves can be completed through PSPICE simulation platform. Secondly, change parameters of transformer fault component into fault current uniformly. Meanwhile, limit the number of failures in k or less in the network. If the node fault current is not zero, the corresponding branch is fault. Thirdly, calculate the actual change value to locate the fault component. Finally, obtain the deformation of the fault components with the help of computer operation. Based on the results, it can be concluded that K ‐fault diagnosis method can detect the radial displacement of the winding when the number of fault locations is no more than 2.