Efficient fault detection of distribution transformers has great
worth when installation of distribution transformers in the field
is taken into account. Computer software has been developed which
makes it possible to detect the region of fault location and
evaluate the strength of insulation puncturing. It is capable of
locating the position of fault along with total percentage of
insulation breakdown region. Different evaluation tests are
performed which are capable to recognize not only visible faults
but also those faults in the windings of distribution transformers
which cannot be captured. Such kinds of faults in transformers
generally pass the impulse test but when they are installed in the
field they are subjected to cause the insulation failure of
windings. The evaluation techniques remarkably cop up with such
kind of insulation breakdowns and present a good quality approach
of evaluation for undesired dominant frequencies. With the help of
this research a new method of impulse testing can be introduced.
The scope of this research is to facilitate the transformer
designers and manufacturers to improve their designing techniques
of insulations which is not yet introduced.
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