Research on Circuit Parameter Model of DC Converter Based on Charge and Discharge Characteristics of Supercapacitor

In this paper, A type controller for supercapacitor bidirectional DC/DC converter control is designed. This project first constructs a complete state space modeling method for an integrated supercapacitor DC/DC converter system based on multicellular cells. An integral circuit is used to ensure that the output of the system is free from any steady-state error. Secondly, the control circuit is set to the optimal closed-loop pole and the inductance current observed by Kalman filter is used as the output signal to control the circuit. The LMI method is used to optimize the controller. The charge and discharge test of the supercapacitor is carried out to verify the feasibility and correctness of the control strategy proposed in this project. The system has high stability margin, good dynamic and static performance, simple parameter design and small calculation.