• Home|About JOPS|Editorial Board| Ethics Statement|Indexed-in|Contact us|Peer Review|Chinese
Latest Papers more>>
WANG Guixin,XIAO Botao.Modeling and Decoupling Control of Current-fed Dual Active Bridge Bidirectional DC-DC Converter[J].JOURNAL OF POWER SUPPLY,2020,18(3):71-79
Modeling and Decoupling Control of Current-fed Dual Active Bridge Bidirectional DC-DC Converter
Received:November 15, 2018  Revised:October 02, 2019
View Full Text  View/Add Comment  Download reader
DOI:10.13234/j.issn.2095-2805.2020.3.71
Keywords:current-fed dual active bridge bidirectional DC-DC converter  equation of state  small signal modeling  decoupling control
Fund Project:the Open Fund of Microgrid Engineering Technology Research Center of Hubei Province(2015KDW03)
     
AuthorInstitutionEmail
WANG Guixin School of Electrical Engineering and New Energy, China Three Gorges University, Yichang , China
XIAO Botao School of Electrical Engineering and New Energy, China Three Gorges University, Yichang , China
Hits: 291
Download times: 1331
Abstract:
      For a current-fed dual active bridge bidirectional DC-DC converter, its operating principle and steady-state characteristics are analyzed. By listing its equations of state in a half-cycle, its small-signal model is established and the system’s transfer function is derived. Due to the intercoupling between the phase shift angle and duty cycle when the system is under closed-loop control, the system’s dynamic performance will deteriorate. To eliminate the intercoupling by means of decoupling control, a steady-state decoupling control strategy is proposed. On the one hand, a controller is designed by analyzing the pairing relation between the control and controlled volumes, which is based on a relative gain matrix. On the other hand, the system’s steady-state decoupling matrix is obtained based on its steady-state process gain matrix. The interactions between the two control loops are significantly reduced by introducing the system’s steady-state decoupling matrix. Finally, the effectiveness and feasibility of the proposed control strategy were verified by simulation and experimental results.
Close