Multi-input bidirectional DC-DC converter is quite vital for a single system to interface multiple sources and allow energy exchange between sources and loads.In this paper,a general multi-input DC-DC converter topolo...Multi-input bidirectional DC-DC converter is quite vital for a single system to interface multiple sources and allow energy exchange between sources and loads.In this paper,a general multi-input DC-DC converter topology and its control strategy are proposed for hybrid energy storage system.This converter can connect any number of power sources and make any ports controllable bidirectionally.To interface N power sources,only N+1 controllable power switches are needed,which makes converter more compact with largely reduced power devices and driving circuits.Without loss of generality,a case with two sources(N=2)is utilized as a typical study case for experimental verification.Experimental results show this converter can interface two individual power sources simultaneously and ensure flexible power flow control with all ports bi-directionally.N=2 converter structure can be developed as an integrated converter module,which is able to combine with traditional bidirectional buck/boost DC-DC converter(BBDC)to construct series-connected or parallel connected integrated converters for multi-source applications.展开更多
基金supported in part by the National Natural Science Foundation of China under Grant 52077105in part by the Natural Science Foundation of Jiangsu Province China under Grant BK20211285in part by Excellent Research and Innovation Teams in Universities in Anhui Province under Grant 2023 AH010021。
文摘Multi-input bidirectional DC-DC converter is quite vital for a single system to interface multiple sources and allow energy exchange between sources and loads.In this paper,a general multi-input DC-DC converter topology and its control strategy are proposed for hybrid energy storage system.This converter can connect any number of power sources and make any ports controllable bidirectionally.To interface N power sources,only N+1 controllable power switches are needed,which makes converter more compact with largely reduced power devices and driving circuits.Without loss of generality,a case with two sources(N=2)is utilized as a typical study case for experimental verification.Experimental results show this converter can interface two individual power sources simultaneously and ensure flexible power flow control with all ports bi-directionally.N=2 converter structure can be developed as an integrated converter module,which is able to combine with traditional bidirectional buck/boost DC-DC converter(BBDC)to construct series-connected or parallel connected integrated converters for multi-source applications.
