Developing an off-board rapid battery charging station is quite challenging since it must handle numerous battery chemistries with varying power requirements while maintaining high power conversion efficiency and small size. Furthermore, numerous modular topologies are widely employed to meet the battery's high power requirements while decreasing voltage and current stress on power switches, permitting the use of low-power rating switches. In such modular architectures, power balance among modules must be ensured to avoid overvoltage/overcurrent. Furthermore, such modular systems require many sensors, raising system costs. The traditional observers commonly used to reduce the sensor number introduce large errors between the actual and estimated system states and possess poor transient performance. To address these shortcomings, this paper proposes an improved extended state observer for modular DAB-based battery charging of electric vehicles. Numerical simulations using MATLAB/Simulink demonstrate the proposed system's robustness against disturbances and show how the transient response of the system is greatly improved.
A Reduced-Sensor Modular Dual Active Bridge-Based Battery Charging System for Electric Vehicles Using an Improved Linear Extended State Observer / Nkembi, A. A.; Cova, P.; Kortabarria, I.; Sacchi, E.; Delmonte, N.; Portesine, M.. - ELETTRONICO. - 2024-June:(2024), pp. 2464-2472. (Intervento presentato al convegno PCIM Europe 2024; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management tenutosi a Norimberga (Germania) nel 11 - 13 giugno 2024) [10.30420/566262347].
A Reduced-Sensor Modular Dual Active Bridge-Based Battery Charging System for Electric Vehicles Using an Improved Linear Extended State Observer
Nkembi A. A.;Cova P.;Kortabarria I.;Delmonte N.;
2024-01-01
Abstract
Developing an off-board rapid battery charging station is quite challenging since it must handle numerous battery chemistries with varying power requirements while maintaining high power conversion efficiency and small size. Furthermore, numerous modular topologies are widely employed to meet the battery's high power requirements while decreasing voltage and current stress on power switches, permitting the use of low-power rating switches. In such modular architectures, power balance among modules must be ensured to avoid overvoltage/overcurrent. Furthermore, such modular systems require many sensors, raising system costs. The traditional observers commonly used to reduce the sensor number introduce large errors between the actual and estimated system states and possess poor transient performance. To address these shortcomings, this paper proposes an improved extended state observer for modular DAB-based battery charging of electric vehicles. Numerical simulations using MATLAB/Simulink demonstrate the proposed system's robustness against disturbances and show how the transient response of the system is greatly improved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.