Core Loss Analysis of Power Transformers with Different Core Steps Using Finite Element Method

In this study, the impact of core steps on transformer performance and core losses is thoroughly analyzed using the Finite Element Method (FEM). Four different core structures, consisting of 5, 7, 9, and 13 steps, are simulated to assess their effects. The analysis is applied to a 3150 kVA, 20/0.4 kV power transformer. The core material utilized is Cold Rolled Grain Oriented (CRGO) steel with a lamination thickness of 0.23 mm. The results of the simulations indicate that the best performance is obtained when 13 steps are used in the construction of the transformer core. Specifically, it is observed that as the number of core steps increases, the core losses are reduced, leading to improved efficiency. This comprehensive study provides valuable insights into optimizing transformer design by adjusting core step configurations to minimize energy losses and enhance overall performance.