Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
704943 | Electric Power Systems Research | 2009 | 8 Pages |
Abstract
In the paper new algorithms for detection of internal inter-turn faults in power transformers are described. Such faults are extremely difficult to detect since they induce negligible increase of the currents at the transformer terminals, although the currents flowing at the fault place are very high and dangerous for the transformer to be protected. The algorithms developed are based on the differential equation of the equivalent circuit of the transformer. In one version additional information from a CT installed inside of the triangle of delta side windings is used, which brings very promising results. Theoretical investigations are supported and illustrated with simulation studies performed both with MATLAB and EMTP-ATP programs.
Related Topics
Physical Sciences and Engineering
Energy
Energy Engineering and Power Technology
Authors
Andrzej Wiszniewski, Waldemar Rebizant, Ludwig Schiel,