<?xml version='1.0' encoding='utf-8'?>
<oai_dc:dc xmlns:dc='http://purl.org/dc/elements/1.1/' xmlns:oai_dc='http://www.openarchives.org/OAI/2.0/oai_dc/' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xsi:schemaLocation='http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd'>
<dc:creator>Boşneaga, V.A.</dc:creator>
<dc:creator>Suslov, V.M.</dc:creator>
<dc:date>2017</dc:date>
<dc:description xml:lang='en'><p>Based on the previously proposed model the simulations were made and characteristic features<br />of steady asymmetric modes of three-phase core type (three leg) transformer were investigated for zigzag<br />winding connection, taking into consideration the electromagnetic coupling of windings, located on<br />different legs. Calculations and analysis were conducted based on distribution transformer 100 kVA,<br />10/0.4 kV and include the most typical steady unbalanced conditions, arising at various short circuits,<br />including those, accompanied by the presence of zero sequence magnetic flux. For the considered modes<br />vector diagrams of currents and voltages, as well as the relative values of the magnetic flux were<br />constructed, which provide a clear visual representation of their features. It was demonstrated, that if the<br />numbers of secondary windings turns are unequal, zigzag scheme no longer has advantages in asymmetric<br />modes. These advantages also disappear at single-phase short-circuit of one secondary winding.<br />Additional measures should be taken for the reliable protection against such short-circuits and prevention<br />of transformer damage.</p></dc:description>
<dc:source>Управляемые электропередачи () 24-29</dc:source>
<dc:subject>Power Transformer</dc:subject>
<dc:subject>core type</dc:subject>
<dc:subject>three limbs</dc:subject>
<dc:subject>asymmetric modes</dc:subject>
<dc:subject>zigzag</dc:subject>
<dc:subject>zero sequence</dc:subject>
<dc:subject>magnetic flux</dc:subject>
<dc:title>Three-phase Three Legs Power Transformers Asymmetrical Modes Study for Zigzag Windings Connection</dc:title>
<dc:type>info:eu-repo/semantics/article</dc:type>
</oai_dc:dc>