Problem Analysis by Iron Core Structure of the Transformer on Asymmetric three Phase lines and Prevention Measures

Abstract

-The study analyzed problems by iron core structure of the three phased transformer on asymmetric three phase lines, which included line disconnections, ground faults, COS OFF, and unbalanced loads on the power distribution system. In particular, by analyzing PT combustion cases within the MOF, the study was able to analyze the combustion cause of the core-type transformer and its effect on the system, conduct simulations and practice demonstrations on the characteristics for each iron core structure of the three phase transformer using PSCAD/EMTDC, and suggest measures to prevent the combustion of the core-type transformer.

Stand-Alone Microgrid Inverter Controller Design for Nonlinear, Unbalanced Load with Output Transformer

“…Three-phase, four-wire inverters for removing the zero sequence component and negative sequence component have been studied [9][10][11][12][13], but these studies do not address the zero sequence component impedance caused by the transformer structure. There have also been studies on the zero sequence component impedance caused by the transformer structure in electric power distribution systems [14][15][16], but there have been no previous studies on stand-alone inverters.…”