Evaluation of topologies and optimal design of a hybrid distribution transformer

Due to the increasing integration of distributed generators, the grid underlies conceptual challenges. To ensure an efficient and reliable operation, more controllable assets are expected in the future grid. The transformer as one of the most important components possesses only limited control capabilities today. By combining a conventional transformer with a converter, a hybrid transformer with comprehensive controllability is obtained. In this paper, suitable concepts are investigated and an optimum design is determined to compare its potential to conventional and solid state transformers.