A Disturbance Rejection Control Strategy of a Single Converter Hybrid Electrical System Integrating Battery Degradation

Yue Zhou, Hussein Obeid, Salah Laghrouche, Mickael Hilairet and Abdesslem Djerdir
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Yue Zhou: FEMTO-ST Institute, FCLAB, Université Bourgogne Franche-Comté, UTBM, CNRS, Rue Ernest Thierry Mieg, F-90000 Belfort, France
Hussein Obeid: FEMTO-ST Institute, FCLAB, Université Bourgogne Franche-Comté, UTBM, CNRS, Rue Ernest Thierry Mieg, F-90000 Belfort, France
Salah Laghrouche: FEMTO-ST Institute, FCLAB, Université Bourgogne Franche-Comté, UTBM, CNRS, Rue Ernest Thierry Mieg, F-90000 Belfort, France
Mickael Hilairet: FEMTO-ST Institute, FCLAB, Université Bourgogne Franche-Comté, UTBM, CNRS, Rue Ernest Thierry Mieg, F-90000 Belfort, France
Abdesslem Djerdir: FEMTO-ST Institute, FCLAB, Université Bourgogne Franche-Comté, UTBM, CNRS, Rue Ernest Thierry Mieg, F-90000 Belfort, France

Energies, 2020, vol. 13, issue 11, 1-19

Abstract: In order to improve the durability and economy of a hybrid power system composed of a battery and supercapacitors, a control strategy that can reduce fluctuations of the battery current is regarded as a significant tool to deal with this issue. This paper puts forwards a disturbance rejection control strategy for a hybrid power system taking into account the degradation of the battery. First, the degradation estimation of the battery is done by the model-driven method based on the degradation model and Cubature Kalman Filter (CKF). Considering the transient and sinusoidal disturbance from the load in such a hybrid system, it is indispensable to smooth the behavior of the battery current in order to ensure the lifespan of the battery. Moreover, the constraints for the hybrid system should be considered for safety purposes. In order to deal with these demands, a cascaded voltage control loop based on a super twisting controller and proportional integral controller with an anti-windup scheme is designed for regulating the DC bus voltage in an inner voltage loop and supercapacitors’ voltage in an outer voltage loop, respectively. The specific feature of the proposed control method is that it operates like a low-pass filter so as to reduce the oscillations on the DC bus.

Keywords: hybrid power system; battery degradation; supercapacitors; disturbance rejection; super twisting controller; anti-windup scheme (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
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