Solid State Transformers Bi-directional control based on Dual Active Bridge

The electrical distribution network is continuously changing due the fact that in recent years the distributed generation sources interacting with it have increased, this impacts direcly the energy consumption dynamics because the network does not just deliver energy but can also receive it. These new operating conditions requires new and modern conditioning stages and power flow control rules to ensure optimal system performance. One of the alternatives currently being studied and developed to face this challenge are Solid State Transformers (SST). These devices are composed by Power Electronic Converters and have diverse attractive features which make them a vital, world-class study case; one of his main requirements its to ensure a proper operation on the SST power flux direction. This paper describes a control proposal applied to a Dual Active Bridge (DAB) converter, which is part of an SST; the proposal serves as the starting point to establish new control rules that satisfy the basics criteria that a bidirectional converter needs to meet.