An Interleaving 90° Three-Level DC-DC Converter and Current Sharing Control

2018 IEEE International Power Electronics and Application Conference and Exposition (PEAC) Pub Date : 2018-11-01 DOI:10.1109/PEAC.2018.8590427

Pengcheng Li, Chunjiang Zhang, Zhizhong Kan, Yuliang Fu

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引用次数: 2

Abstract

A new topology of an interleaving three-level bidirectional DC/DC converter with voltage-loop control, which is suitable for single bus DC microgrid, was proposed in this paper. The three-level DC/DC converter can make the voltage stress of switching device half of the voltage of the high voltage terminal and common location of input and output, while the two bridges interleaving 90° can reduce the input current ripple, improve the life of the energy storage unit. The operating principle of the proposed interleaving three-level bidirectional DC/DC converter as well as the influence of the duty ratio on the operating state are analyzed in this paper to establish a state-space averaging model. Using the double loop control did not reduce the dynamic response speed of the converter, and the current loop suppresses the interphase circulation. The current sharing control for the converter is to stabilize the voltage of dc bus. Experimental results obtained from a 1kW converter prototype confirm the steady-state and the dynamic characteristics of the bidirectional energy transfer.

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交错90°三电平DC-DC变换器及电流共享控制

提出了一种适用于单母线直流微电网的具有电压环控制的交错三电平双向DC/DC变换器的新拓扑结构。三电平DC/DC变换器可使开关器件的电压应力降低到高压端子和输入输出共用位置电压的一半，同时两桥90°交错可减小输入电流纹波，提高储能单元的寿命。本文分析了所提出的交错三电平双向DC/DC变换器的工作原理以及占空比对工作状态的影响，建立了状态空间平均模型。采用双环控制并没有降低变换器的动态响应速度，而且电流环抑制了相间循环。变换器的共流控制是为了稳定直流母线的电压。在1kW变流器样机上的实验结果证实了双向能量传递的稳态和动态特性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2018 IEEE International Power Electronics and Application Conference and Exposition (PEAC)

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