基于双重移相的双向有源全桥DC-DC变换器优化控制策略

doi:10.16180/j.cnki.issn1007-7820.2023.12.012

Abstract

Abstract:

In view of the problem of high backflow power, the hard opening loss of the switching device and poor dynamic performance of bidirectional active full-bridge converter,a control scheme based on dual phase shifting combining backflow power optimization and virtual direct power control is proposed in this study. By analyzing the working principle and working characteristics of the dual phase shift control, the soft switching boundary of zero voltage switching is derived as the constraint condition,with the soft switching as the constraint condition, The blackflow power optimization scheme in the whole power range is obtained by KKT(Karush-Kuhn-Tucker) conditional optimization algorithm.This scheme is combined with virtual direct power method and works simultaneously.When the operation condition changes,it could not only reduced effectively backflow power,but also enhance fast dynamic response.Finally,the MATLAB/Simulink simulation model and a small power converter prototype is built for the comparison experiment to verify the correctness and superiority of the proposed control strategy.

Key words: bi-directional active full bridge converter, dual-phase-shift control, soft switch, KKT, backflow power, virtual direct power control, dynamic performance

CLC Number:

TP273

LI Yudong,LUO Xinquan,LI Peifeng,HUANG Xin. Optimal Control Strategy for Bi-Directional Active Full Bridge DC-DC Converter Based on Dual Phase Shift[J].Electronic Science and Technology, 2023, 36(12): 87-94.

Figures/Tables 14

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参数	数据
输入电压U₁/V	100
参考电压U_2ref/V	60
输入端电容C₁/μF	470
负载端电容C₂/μF	470
开关频率f/kHz	10
电感L/μH	50
变压器变比n	1

Optimal Control Strategy for Bi-Directional Active Full Bridge DC-DC Converter Based on Dual Phase Shift

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