Improved Linear Active Disturbance Rejection Control with Dynamic Event-triggered Mechanism for Hybrid Energy Storage System

The hybrid energy storage system (HESS) technique is important to achieve power release and recovery for the electric vehicles (EVs). This paper proposes an improved linear active disturbance rejection control incorporating with dynamic event-triggered mechanism (DET-iLADRC) method for the battery-supercapacitor HESS. The iLADRC controller employs series lead corrections to enhance the accuracy of disturbance estimation by observing the total disturbance. This leads to improved dynamic response and robustness through feedback and compensating control. In order to improve the computational efficiency of iLADRC, the DET mechanism is introduced, which is more sensitive to state deviation and requires less information to design the triggering condition. The iLADRC controller calculates and updates control signals only when the dynamic triggering condition is activated by the HESS’s state error, eliminating redundant control tasks and reducing the computational burden. The paper also investigates parameter selection and its impact through simulations. Finally, the effectiveness of the proposed method is validated using a scaled-down HESS laboratory setup. Simulation and experimental results demonstrate that DET-iLADRC outperforms the previous event-triggered method in terms of voltage regulation performance and computational efficiency.