Leakage flux generated in the power transformers cause stray losses in metallic parts of the transformer.Stray losses largely affect the transformer hot spot which leads to thermal failure.It is necessary to mitigate ...Leakage flux generated in the power transformers cause stray losses in metallic parts of the transformer.Stray losses largely affect the transformer hot spot which leads to thermal failure.It is necessary to mitigate the impact of leakage flux on metallic parts by employing magnetic shunts and eddy current shields.Preeminently clamping structures like flitch plate and end frames experience substantial losses,hence combinations of shielding can be used for better loss reduction.In this study,a case study is performed on a 315 MVA,420/27 kV single-phase generator power transformer.This work is based on coupled three-dimensional(3D)finite-element analysis(FEA)of the transformer model.A new type of magnetic shunt is explored;also different design combinations of shielding are specified in this work for efficient mitigation of hot spots as well as tank walls.展开更多
文摘Leakage flux generated in the power transformers cause stray losses in metallic parts of the transformer.Stray losses largely affect the transformer hot spot which leads to thermal failure.It is necessary to mitigate the impact of leakage flux on metallic parts by employing magnetic shunts and eddy current shields.Preeminently clamping structures like flitch plate and end frames experience substantial losses,hence combinations of shielding can be used for better loss reduction.In this study,a case study is performed on a 315 MVA,420/27 kV single-phase generator power transformer.This work is based on coupled three-dimensional(3D)finite-element analysis(FEA)of the transformer model.A new type of magnetic shunt is explored;also different design combinations of shielding are specified in this work for efficient mitigation of hot spots as well as tank walls.
