Optimum Shielding Design for Losses and Noise Reduction in Power Transformers

In the current study, intensive measurements and finite element method (FEM) simulations to optimize the application of magnetic shunts in power transformers are performed. The investigation accounts the effective parameters influencing the magnetic shunts design for the objective of controlling the leakage flux to reduce the generated losses and noise in transformers. Eventually, design rules for the tank and yoke shunts are developed. The developed design tools are applied on case study transformers with different designs, ratings and short circuit impedances. Results show significant reductions in the generated losses and noise during load operation. The study gives the opportunity to optimize the final power transformer design with saving in materials, and therefore the total cost, while the design is still fulfilling the market requirements for both losses and noise.