孟祥有,梁帅,孙谦浩,孟经伟.基于占空比主动调节的钳位开关电容型DC/DC解耦控制策略[J].电测与仪表,2024,61(5):212-217. Meng Xiangyou,LIANG Shuai,Sun Qianhao,Meng Jingwei.Decoupled control strategy based on duty-ratio active regulation for clamping switched capacitors-based DC/DC application[J].Electrical Measurement & Instrumentation,2024,61(5):212-217.
基于占空比主动调节的钳位开关电容型DC/DC解耦控制策略
Decoupled control strategy based on duty-ratio active regulation for clamping switched capacitors-based DC/DC application
The clamping switch capacitor-based DC/DC (CSC) is an effective module to construct the DC transformer with the capability of DC faults clearing. However, the voltage amplitude of capacitor and AC-link will be influenced directly by the change of DC voltages in the traditional control of CSC because of the coupling effect of DC voltage and capacitor voltage, thus the loss of soft-switching, the increase of current stress and power loss may occur when the DC voltages are unmatched. In view of this issue, a capacitor voltage decoupled control strategy based on the variable duty-ratio is presented for CSC to improve the switching and efficiency performance when the DC voltage is unmatched. The proposed control strategy can guarantee the amplitude of AC voltages is matched in the full-operating-range of CSC automatically, so the efficiency of CSC can be enhanced obviously. The correctness and effectiveness of the proposed control strategy are validated by the prototype.
