Research on digital control strategy of interleaved parallel BUCK converter with nonlinear loop compensation
In view of the low voltage and high current output of hydrogen fuel cell, which cannot be used as the power supply of communication base station, a power electronic interleaved parallel BUCK converter is designed, and a digital control strategy with nonlinear loop compensation is proposed. In this paper, two BUCK circuits are connected in parallel, the control signal is 180° two-phase staggered pulse width control, the mathematical model of voltage loop and current loop is established by using small signal model, and the control strategy adopts double closed-loop control of current inner loop and voltage outer loop. In order to achieve fast quasi-stable control, the compensation and correction design of the two-loop control strategy is carried out respectively, and the simulink model of the interleaved BUCK converter is built through the loop compensation digital control strategy. The simulation results confirmed the effectiveness of this study by verifying that the converter achieves a stable 48V DC output within the input range.
small signal modelloop compensationinterleaved paralleldigital control strategy
万方数据
维普
