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A novel algorithm for detection of transformer's turn to turn faults using modified differential current and primary negative sequence current
Version 3 2019-08-25, 19:19
Version 2 2019-08-25, 18:41
Version 1 2019-08-25, 15:22
conference contribution
posted on 2019-08-25, 19:19 authored by Mohammad GholamiMohammad Gholami, Ehsan Hajipour, Mehdi VakilianTransformers are one of the most
important and strategic component in generation, transmission and
distribution systems. Therefore, it is essential to avoid any scenario
in which a risk may threaten this important network equipment.
Differential protection as a main protection scheme of transformers has
typically not been sensitive enough to detect winding minor turn-to-turn
faults (less than 10%). Therefore, this paper after surveying existing
algorithm in literature and discuss their defects, tries to develop new
algorithm for detecting minor turn-to-turn faults of transformers. To
that end, root mean square of negative sequence current of primary side
of transformers is used and new concept of modified differential current
is introduced. The proposed algorithm is tested on a typical
transformer and the results are discussed.