Voltage Stabilization Strategy Based on Linear-Nonlinear Switching ADRC for Low-Voltage Interface Converter in DC Microgrid

As the main effective form of new energy utilization, DC microgrid realized energy flow through interface converters on the DC bus. In order to ensure the stability of the supply of low-voltage loads considering a variety of complex conditions. Accordingly, a linear-nonlinear switching active disturbance rejection control (SADRC) is proposed in this paper. Its nonlinear characteristics are used to optimize the control effect, and using its linear active disturbance rejection characteristics to accelerate the inhibition of large disturbance. In addition, the stability and control performance of SADRC is theoretically analyzed. Finally, the anti-disturbance characteristics of different controllers under different working conditions are obtained through experimental platform, so as to complete the verification of the correctness and effectiveness of SADRC.