基于倍频采样的两相交错并联三电平双向直流变换器功率均衡解耦控制策略

doi:10.19595/j.cnki.1000-6753.tces.211057

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摘要该文提出一种两相交错并联三电平双向DC-DC变换器功率均衡解耦控制策略,并有效地减少了电流传感器的使用。通过对变换器拓扑工作原理的分析,得出两相交错三电平拓扑的等效两电平分析方法。在此基础上,提出基于总电流分时倍频采样功率均衡解耦控制策略,使变换器的电压调节与相间电流均衡控制实现了完全解耦。此外,将常规均衡控制所需的四路电流采样,减少为两路,达到了简化控制结构的目的。建立基于等效拓扑下的小信号模型,利用该模型对所提方案进行理论验证,并给出控制器参数的具体设计方案。最后通过小功率物理仿真实验对所提控制策略进行了有效验证。

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	樊启高
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关键词 ：交错并联, 三电平双向直流变换器, 功率均衡解耦控制, 倍频采样策略

Abstract：A decoupled power-balancing control strategy for the two-phase interleaved parallel three-level bidirectional DC-DC converter is proposed in this paper, and the use of current sensors is effectively reduced. By analyzing the working principle of topology, an equivalent two-level analysis method under the two-phase interleaved parallel topology is obtained. On this basis, a decoupled power-balancing control strategy based on total current time-sharing and frequency-doubling sampling is proposed to fully decouple the voltage regulation of the converter from the current-balancing control between phases. In addition, the four channels of current sampling required by the conventional balance control are reduced to two channels, which simplifies the control structure. A small signal model based on the equivalent topology is established, and the specific design scheme of the controller parameters is given. Finally, the proposed control strategy is verified by a physical experiment.

Key words： Interleaved parallel three-level bidirectional DC converter decoupled power- balancing control frequency-doubling sampling strategy

收稿日期: 2021-07-15

PACS:

TM46

基金资助:中国博士后科学基金（2020M681692）和江苏省自然科学基金（BK20200623）资助项目

通讯作者: 毕恺韬男,1989年生,讲师,研究方向为大功率储能功率变换技术。E-mail: bkt1989@163.com

作者简介: 樊启高男,1986年生,副教授,硕士生导师,研究方向为新能源发电及机电一体化技术。E-mail: qgfan@jiangnan.edu.cn

引用本文:

樊启高, 卢禹卓, 毕恺韬, 安群涛, 朱一昕. 基于倍频采样的两相交错并联三电平双向直流变换器功率均衡解耦控制策略[J]. 电工技术学报, 2022, 37(14): 3654-3664. Fan Qigao, Lu Yuzhuo, Bi Kaitao, An Quntao, Zhu Yixin. Decoupled Power-Balancing Control Strategy for Two-Phase Interleaved Parallel Bidirectional DC Converter Based on Frequency-Doubling Sampling. Transactions of China Electrotechnical Society, 2022, 37(14): 3654-3664.

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