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A NOVEL SOFT-SWITCHING MULTIPORT 
BIDIRECTIONAL DC–DC CONVERTER FOR HYBRID 
ENERGY STORAGE SYSTEM 
ABSTRACT: 
A novel multiport isolated bidirectional dc–dc converter for hybrid battery 
and supercapacitor applications is presented, which can achieve zero voltage 
switching for all switches in the whole load range. The bidirectional power flow 
between any two of the ports is free, and the circulating power is low for the well 
matching of the transformer voltages of all time regardless of the voltage variations 
of the battery and supercapacitor.Moreover,the current ripples are greatly 
decreased by interleaved control, which is good for battery and supercapacitor. The 
converter topology and the operation principle are introduced. Detailed analysis on 
soft-switching of all switches is given. On the basis of theoretical analysis, the 
principle and method for parameter designing are provided. A hybrid energy 
management strategy combining bus voltage control and energy management of 
the energy storage devices is proposed and the control scheme is presented.
BLOCK DIAGRAM: 
Low voltage side Multiport 
TOOLS USED: 
Mp lab 
Orcad/pspice 
converter 
Dc voltage side 
Driver unit 
Pulse generator 
12v dc 
5v dc

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JPEEE1459 A Novel Soft-Switching Multiport Bidirectional DC–DC Converter for Hybrid Energy Storage System

  • 1. A NOVEL SOFT-SWITCHING MULTIPORT BIDIRECTIONAL DC–DC CONVERTER FOR HYBRID ENERGY STORAGE SYSTEM ABSTRACT: A novel multiport isolated bidirectional dc–dc converter for hybrid battery and supercapacitor applications is presented, which can achieve zero voltage switching for all switches in the whole load range. The bidirectional power flow between any two of the ports is free, and the circulating power is low for the well matching of the transformer voltages of all time regardless of the voltage variations of the battery and supercapacitor.Moreover,the current ripples are greatly decreased by interleaved control, which is good for battery and supercapacitor. The converter topology and the operation principle are introduced. Detailed analysis on soft-switching of all switches is given. On the basis of theoretical analysis, the principle and method for parameter designing are provided. A hybrid energy management strategy combining bus voltage control and energy management of the energy storage devices is proposed and the control scheme is presented.
  • 2. BLOCK DIAGRAM: Low voltage side Multiport TOOLS USED: Mp lab Orcad/pspice converter Dc voltage side Driver unit Pulse generator 12v dc 5v dc