@article{Pjevalica_Petrovic_Pjevalica_Teslic_2016, title={Experimental Detection of Transformer Excitation Asymmetry through the Analysis of the Magnetizing Current Harmonic Content}, volume={22}, url={https://eejournal.ktu.lt/index.php/elt/article/view/14590}, DOI={10.5755/j01.eie.22.2.14590}, abstractNote={<p>The presence of a low DC voltage in a power grid produces an excitation asymmetry for the distribution transformers, resulting in unwanted half-cycle saturation that may impair transformer safety, reliability and efficiency, especially in increasing the reactive power, stray losses and iron losses. This paper highlights a diagnostic method based on the phase value of the particular even harmonics of a transformer excitation current as the basic marker of an excitation asymmetry. In order to achieve a straightforward insight into the nature of even harmonics behaviour, a novel method of decomposition an excitation current waveform into its unhysteretic (pure magnetization) and hysteretic components has been included in the harmonic analysis.</p><p>DOI: <a href="http://dx.doi.org/10.5755/j01.eie.22.2.14590">http://dx.doi.org/10.5755/j01.eie.22.2.14590</a></p>}, number={2}, journal={Elektronika ir Elektrotechnika}, author={Pjevalica, Nebojsa and Petrovic, Nenad and Pjevalica, Velibor and Teslic, Nikola}, year={2016}, month={Apr.}, pages={43-48} }