DC Transformers in DC Distribution Systems

With the rapid development of power electronics technology and its successful application, many demonstration projects medium/low-voltage DC (M-LVDC) distribution systems have been constructed. The transformer (DCT) is key equipment in M-LVDC system for interconnecting MVDC LVDC buses. In this paper, characteristics DCTs are summarized. existing topologies analyzed, relevant control strategies researched, including steady-state control, transient cascaded control. engineering application examples introduced by interpreting medium low-voltage project Wujiang City, Suzhou. Finally, challenges faced DCT given, future trend predicted. This perspective provides a constructive basis an important reference systems.