High Frequency Transformers for Solid-State Transformer Applications

Abstract

This paper focuses on the study of the high frequency transformer incorporated in solid- state transformers, specifically on the development of the steps that enable the design of an optimized high frequency transformer and its equivalent model based on the desired characteristics. The impact of operating a transformer at high frequency and the respective solutions that allow this impact to be reduced are analyzed, alongside the numerous advantages that the utilization of these transformers has over traditional 50/60 Hz transformers. Furthermore, the power scheme of the solid-state transformer is outlined, focusing on the power converters, which are immediately before and after the high frequency transformer (HFT). We also investigate a control technique that allows for correct operation and the existence of power bidirectionality. In a novel approach, this paper demonstrates the systematic steps for designing an HFT according to the desired specifications of each given project, helping students and engineers achieve their objectives in power-electronic applications. Moreover, this paper aims at increasing the knowledge of this area of power electronics and facilitating the development of new topologies with high power density, which are very important to the integration of renewable power sources and other applications. Finally, a simulation is presented to validate a high frequency transformer and its control technique.

Life Cycle Cost Estimation and Analysis of Transformers Based on Failure Rate

“…Saniya Khan [7] discussed the application and recent applications of SSTs as a substitute for low-frequency transformer (LFTs), and explored the future challenges of the real-time implementation of SSTs and proposed research directions. Nuno Santos [8] focused on researching high-frequency transformers in solid-state transformers, especially the steps of designing and optimizing high-frequency transformers and their equivalent models based on the required characteristics. The efficient management of substation equipment not only demands the implementation of effective technical monitoring and analysis of the equipment, but also necessitates judicious management strategies and economically prudent personnel allocation to optimize cost savings.…”