Model-free Predictive Voltage Control of Dual Active Bridge Converter Based on Adaptive Linear Extended State Observer - Details

author：

Yu, Xinhong (Yu, Xinhong.) ^[1] | Cao, Jiansheng (Cao, Jiansheng.) ^[2] | Xu, Libin (Xu, Libin.) ^[3] | Hu, Cungang (Hu, Cungang.) ^[4] | Wang, Fengxiang (Wang, Fengxiang.) ^[5]

Indexed by：

EI Scopus

Abstract：

The　model　predictive　control　is　parameter　dependent,　the　traditional　disturbance　observer　applied　in　dual　active　bridge　converter,　such　as　the　estimation　compensation,　may　lag　behind　the　external　disturbances,　and　the　fixed　gain　is　not　able　to　adapt　to　the　change　of　external　wide-range　disturbances.　Therefore,　a　model-free　predictive　voltage　control　strategy　based　on　adaptive　linear　extended　state　observer　is　proposed.　Firstly,　the　voltage　prediction　ultra-local　model　of　the　dual　active　bridge　converter　is　constructed　by　combining　the　predictive　control　and　model-free　control　methods,　instead　of　the　traditional　physical　model,　which　reduces　the　parameter　dependence.　Secondly,　the　linear　extended　state　observer　is　designed　to　provide　feedback　compensation　for　the　dynamic　part　of　the　ultra-local　model　to　improve　the　control　accuracy.　At　the　same　time,　by　online　fitting　the　voltage　error　trend,　the　observer　bandwidth　is　adaptively　adjusted　to　realize　the　over-advanced　compensation.　Finally,　the　cost　function　is　designed　to　solve　the　optimal　shift　ratio　for　model-free　predictive　voltage　control.　The　experimental　results　verify　the　effectiveness　of　the　method　in　improving　the　robustness　and　dynamic　of　the　system.　©　2024　Science　Press.　All　rights　reserved.

Keyword：

Adaptive control systems Cost functions Electric inverters Model predictive control Predictive control systems Robust control Robustness (control systems) State estimation

Community：

[ 1 ] [Yu, Xinhong]National and Local Joint Engineering Research Center for Electrical Drives and Power Electronics, Quanzhou Institute of Equipment Manufacturing, Haixi Institute, CAS, Quanzhou; 362216, China
[ 2 ] [Cao, Jiansheng]National and Local Joint Engineering Research Center for Electrical Drives and Power Electronics, Quanzhou Institute of Equipment Manufacturing, Haixi Institute, CAS, Quanzhou; 362216, China
[ 3 ] [Cao, Jiansheng]College of Mechanical and Electrical Engineering, Fujian Agriculture and Forestry University, Fuzhou; 350100, China
[ 4 ] [Xu, Libin]National and Local Joint Engineering Research Center for Electrical Drives and Power Electronics, Quanzhou Institute of Equipment Manufacturing, Haixi Institute, CAS, Quanzhou; 362216, China
[ 5 ] [Xu, Libin]College of Electrical Engineering and Automation, Fuzhou University, Fuzhou; 350108, China
[ 6 ] [Hu, Cungang]School of Electrical Engineering and Automation, Anhui University, Hefei; 230601, China
[ 7 ] [Wang, Fengxiang]National and Local Joint Engineering Research Center for Electrical Drives and Power Electronics, Quanzhou Institute of Equipment Manufacturing, Haixi Institute, CAS, Quanzhou; 362216, China
[ 8 ] [Wang, Fengxiang]College of Electrical Engineering and Automation, Fuzhou University, Fuzhou; 350108, China