Dynamic response enhancement of cascaded DC/DC converter systems using an auxiliary circuit

Xiaotong Liu, Shengwen Fan, Zhenyu Shan, Zhen Li

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Citations (Scopus)

Abstract

The paper presents an approach to enhancing the dynamic response of a cascaded DC/DC converter system, where virtual impedance control schemes are used for stabilization. A cascaded DC/DC converter system may not be stable when the source and load converters are not designed appropriately. Such system can be stabilized by reshaping the input impedance of the load converter with the virtual impedance control method. However, the dynamic performance suffers due to the added virtual-impedance control loop. In this paper, the dynamic performance of the cascaded DC/DC converter system is enhanced with an additional auxiliary circuit that is connected to the output port of the load converter and functions to buffer fast load transients. The simulation result shows that the voltage transient deviation on the load converter is significantly reduced with the proposed method.

Original languageEnglish
Title of host publication2020 IEEE International Symposium on Circuits and Systems, ISCAS 2020 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728133201
Publication statusPublished - 2020
Event52nd IEEE International Symposium on Circuits and Systems, ISCAS 2020 - Virtual, Online
Duration: 10 Oct 202021 Oct 2020

Publication series

NameProceedings - IEEE International Symposium on Circuits and Systems
Volume2020-October
ISSN (Print)0271-4310

Conference

Conference52nd IEEE International Symposium on Circuits and Systems, ISCAS 2020
CityVirtual, Online
Period10/10/2021/10/20

Keywords

  • Cascaded converter system
  • Dynamic response
  • Virtual impedance

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