MULTI-PORT DC-DC CONVERTER AND APPLICATION THEREFOR

摘要

A kind of multiport DC-DC auto-transformer, for realizing the interconnection transmission between the different direct current system of multiple voltage class, the auto-transformer includes 2N-1 inverter, the 2N-1 inverter is sequentially connected in series in DC side, and it is connected to alternating current circuit in exchange side, and the positive and negative anodes of the anode of i-th of inverter in the 2N-1 inverter being sequentially connected in series and the cathode of 2N-i inverters respectively with i-th of direct current system are correspondingly connected with; Wherein, N is the number of direct current system, and i is the serial number of inverter. Further disclose the capacity design method of inverter and the control method of above-mentioned auto-transformer in above-mentioned auto-transformer. The auto-transformer can make the most of power transmitted between each direct current system may not need by DC-AC-DC converting, but the electrical interconnection being directly between each direct current system is transmitted, the voltage rating and running wastage for greatly reducing each inverter, to reduce operating cost.