Research on bidirectional DC-DC converter based on improved particle swarm optimization algorithm

The staggered parallel technique can effectively reduce the ripple of the output voltage and current and the stress of each phase current, so as to improve the quality of the output power and improve the steady-state and dynamic performance of the circuit. Based on the analysis of the operation characteristics of the three-phase staggered parallel bidirectional DC/DC converter and the establishment of its mathematical model, a method of PI shifting and current sharing control based on improved particle swarm optimization of PI parameters is proposed. According to the above, MATLAB/SIMULINK simulation verification was carried out. The results show that the current sharing control method using the three-phase inductor current inner loop can solve the current sharing problem caused by the system parameter inconsistency, and the improved particle swarm optimization can make the output voltage more stable and reach the stable state faster when the load changes.