Zigzag transformer - some new applications with a note to energy efficiency
by Kartik P. Basu; Naeem M. Hanoon
International Journal of Power and Energy Conversion (IJPEC), Vol. 6, No. 3, 2015

Abstract: Zigzag transformer is only used as a grounding transformer in a three-phase delta connected power supply system. Equal DC current flowing through the windings of a zigzag transformer does not produce any core saturation and it may be used as an interfacing device for AC supply with DC in a power system. This property of the transformer may be used to transmit DC and AC power simultaneously through the same transmission line. It may also be used to get three-phase voltage from three-wire, two-phase supply and may be used to maintain three-phase load voltage when any one phase of the three-phase supply line trips. This paper emphasises the role of zigzag transformer as a common interfacing device in all these new applications with some comments on the change of energy efficiency of the power system.

Online publication date: Tue, 07-Jul-2015

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