Research on Stability Improvement of the Cascaded DC-DC Converters Based on AC Signal Sampling Control Method

被引：21

作者：

Gu, Yu ^{[1
]}

Zhang, Donglai ^{[1
]}

Wu, Xiaofan ^{[1
]}

Zhang, Xiaofeng ^{[2
]}

机构：

[1] Harbin Inst Technol, Shenzhen Grad Sch, Power Elect & Elect Drives Res Ctr, Shenzhen 518055, Peoples R China

[2] China Acad Space Technol, Beijing 100094, Peoples R China

来源：

IEEE TRANSACTIONS ON POWER ELECTRONICS | 2018年 / 33卷 / 05期

关键词：

AC signal sampling; cascaded system; impedance matching; stability; DISTRIBUTED POWER-SYSTEMS; LOAD IMPEDANCE SPECIFICATION; VOLTAGE POSITIONING SYSTEM; DESIGN; REGULATORS; CRITERION;

D O I：

10.1109/TPEL.2017.2724580

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Cascaded instability of the cascaded power supply system has restricted the development of the dc distributed power system for a long time. In this paper, by analyzing the cascaded instability essential cause of the dc-dc cascaded system, a control method based on output voltage ac signal component sampling feedback is presented to improve the cascaded stability. Meanwhile, the small signal analysis interprets the physical meaning of the cascaded instability, and then analyzed the control method from the frequency characteristics and control loop point of view. Finally, based on the above-mentioned analysis and discussion, a cascaded dc-dc system comprising two Buck converters has been built and tested. The simulation and experimental results verify the validity and reliability of the proposed ac signal sampling component control method on cascaded stability improvement.

引用

页码：4547 / 4559

页数：13

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