Research on Backflow Power Optimization Strategy for Dual-Active-Bridge DC-DC Converter

doi:10.16628/j.cnki.2095-8188.2023.10.003

Abstract

Abstract:

Aiming at the value of the backflow power of dual-active-bridge DC-DC converter is too large during power transmission, based on the dual-phase-shift control, the segmented optimization control strategy is proposed to optimize the backflow power. In the control strategy, the whole output power is divided by defining the power segmentation point. When the output power is lower than the power segmentation point, zero backflow power operation is realized.When the output power is higher than the power segmentation point, the minimum backflow power operation is realized. Finally, a 250 W experimental prototype is built. The experimental results show that compared with the traditional phase shift control method, the segmented optimization control strategy can effectively reduce the backflow power of the dual-active-bridge DC-DC converter and improve the efficiency of the circuit.

Key words: dual-active-bridge DC-DC converter, backflow power, dual-phase-shift control, segmented optimization

CLC Number:

TM46

KANG Zhiwei, XU Yuzhen. Research on Backflow Power Optimization Strategy for Dual-Active-Bridge DC-DC Converter[J]. LOW VOLTAGE APPARATUS, 2023, 0(10): 14-20.

Figures/Tables 14

References 20

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参数	取值
输入电压U₁/V	100
额定输出电压U₂/V	100
储能电感L /μH	103
一次侧、二次侧支撑电容C₁、C₂/μF	470
工作频率f/kHz	50