Control of Power Electronic Converters
Technical Lecture Session
Control of DC-DC Converters
DC transformers, dual-active-bridge (DAB), adaptive control, modularization, voltage/current sharing
This paper proposes an adaptive control method for the dc transformer (DCT) of flexible dc system to achieve automatic voltage regulation and bidirectional power transferring like ac transformers in any operation scenario. In the proposed methods, each module is controlled as rated voltage ratio mode, thus the input voltage sharing can be realized. Meanwhile, this method does not need the master controller to monitor the operating state, share the signal bus or switch the control method throughout the operating process, so the reliability, flexibility and modularity of the DCT are improved. Finally, experimental results have verified the excellent performance of the proposed adaptive control method.