Enhancing Stability of DC Cascaded System by Using Nonlinear Inductor and Virtual Inductor Resistance Control in Source-Interface Converter

Shaocong Wang; Henry Shu-Hung Chung; Ruihua Shen; Hongjian Lin; Weimin Wu

doi:10.1109/ECCE58356.2025.11260255

Enhancing Stability of DC Cascaded System by Using Nonlinear Inductor and Virtual Inductor Resistance Control in Source-Interface Converter

Shaocong Wang
, Henry Shu-Hung Chung
, Ruihua Shen
, Hongjian Lin
, Weimin Wu

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

Abstract

Source-interface DC/DC converters are critical in DC cascaded systems for interfacing energy sources and loads but may suffer instability due to output/load impedance mismatches caused by the negative incremental impedance of constant power load (CPL). The article introduces a novel method that utilizes the nonlinear properties of nonlinear inductors within the power stage of a converter to dynamically adjust its output impedance, thereby enhancing the stability range. The concept presented revolves around the establishing of a resistive power versus constant power plane, which serves as a graphical framework to explore and define the stable power range of a circuit in relation to circuit parameters. Significantly, analysis of the power plane reveals a pivotal finding: the stability range of the system is maximized when the resistance of the inductor matches the characteristic impedance of the LC circuit formed by the converter's inductor and output capacitor. A virtual inductor resistance control is thus proposed to ensure compliance with this impedance requirement. Experimental validation was undertaken on a scaled-down converter system.

© 2025 IEEE

Original language	English
Title of host publication	2025 IEEE Energy Conversion Conference Congress and Exposition (ECCE)
Publisher	IEEE
Number of pages	6
ISBN (Electronic)	979-8-3315-4130-9
DOIs	https://doi.org/10.1109/ECCE58356.2025.11260255
Publication status	Published - 2025
Event	17th IEEE Energy Conversion Congress and Expo (ECCE 2025): Connecting Minds, Powering Innovations - Pennsylvania Convention Center, Philadelphia, United States Duration: 19 Oct 2025 → 23 Oct 2025 https://www.ieee-ecce.org/2025/

Conference

Conference	17th IEEE Energy Conversion Congress and Expo (ECCE 2025)
Abbreviated title	IEEE ECCE 2025
Place	United States
City	Philadelphia
Period	19/10/25 → 23/10/25
Internet address	https://www.ieee-ecce.org/2025/

Funding

This work was supported by grants from the Research Grants Council of the Hong Kong Special Administration Region, China, through project # CityU 11219722.

RGC Funding Information

RGC-funded

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10.1109/ECCE58356.2025.11260255

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@inproceedings{740363627a744f7ebc82bf2c30e51d0b,

title = "Enhancing Stability of DC Cascaded System by Using Nonlinear Inductor and Virtual Inductor Resistance Control in Source-Interface Converter",

abstract = "Source-interface DC/DC converters are critical in DC cascaded systems for interfacing energy sources and loads but may suffer instability due to output/load impedance mismatches caused by the negative incremental impedance of constant power load (CPL). The article introduces a novel method that utilizes the nonlinear properties of nonlinear inductors within the power stage of a converter to dynamically adjust its output impedance, thereby enhancing the stability range. The concept presented revolves around the establishing of a resistive power versus constant power plane, which serves as a graphical framework to explore and define the stable power range of a circuit in relation to circuit parameters. Significantly, analysis of the power plane reveals a pivotal finding: the stability range of the system is maximized when the resistance of the inductor matches the characteristic impedance of the LC circuit formed by the converter's inductor and output capacitor. A virtual inductor resistance control is thus proposed to ensure compliance with this impedance requirement. Experimental validation was undertaken on a scaled-down converter system. {\textcopyright} 2025 IEEE",

author = "Shaocong Wang and Chung, \{Henry Shu-Hung\} and Ruihua Shen and Hongjian Lin and Weimin Wu",

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doi = "10.1109/ECCE58356.2025.11260255",

language = "English",

booktitle = "2025 IEEE Energy Conversion Conference Congress and Exposition (ECCE)",

publisher = "IEEE",

address = "United States",

note = "17th IEEE Energy Conversion Congress and Expo (ECCE 2025) : Connecting Minds, Powering Innovations, IEEE ECCE 2025 ; Conference date: 19-10-2025 Through 23-10-2025",

url = "https://www.ieee-ecce.org/2025/",

}

Wang, S , Chung, HS-H , Shen, R, Lin, H & Wu, W 2025, Enhancing Stability of DC Cascaded System by Using Nonlinear Inductor and Virtual Inductor Resistance Control in Source-Interface Converter. in 2025 IEEE Energy Conversion Conference Congress and Exposition (ECCE). IEEE, 17th IEEE Energy Conversion Congress and Expo (ECCE 2025), Philadelphia, Pennsylvania, United States, 19/10/25. https://doi.org/10.1109/ECCE58356.2025.11260255

Enhancing Stability of DC Cascaded System by Using Nonlinear Inductor and Virtual Inductor Resistance Control in Source-Interface Converter. / Wang, Shaocong ; Chung, Henry Shu-Hung ; Shen, Ruihua et al.
2025 IEEE Energy Conversion Conference Congress and Exposition (ECCE). IEEE, 2025.

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

TY - GEN

T1 - Enhancing Stability of DC Cascaded System by Using Nonlinear Inductor and Virtual Inductor Resistance Control in Source-Interface Converter

AU - Wang, Shaocong

AU - Chung, Henry Shu-Hung

AU - Shen, Ruihua

AU - Lin, Hongjian

AU - Wu, Weimin

PY - 2025

Y1 - 2025

N2 - Source-interface DC/DC converters are critical in DC cascaded systems for interfacing energy sources and loads but may suffer instability due to output/load impedance mismatches caused by the negative incremental impedance of constant power load (CPL). The article introduces a novel method that utilizes the nonlinear properties of nonlinear inductors within the power stage of a converter to dynamically adjust its output impedance, thereby enhancing the stability range. The concept presented revolves around the establishing of a resistive power versus constant power plane, which serves as a graphical framework to explore and define the stable power range of a circuit in relation to circuit parameters. Significantly, analysis of the power plane reveals a pivotal finding: the stability range of the system is maximized when the resistance of the inductor matches the characteristic impedance of the LC circuit formed by the converter's inductor and output capacitor. A virtual inductor resistance control is thus proposed to ensure compliance with this impedance requirement. Experimental validation was undertaken on a scaled-down converter system. © 2025 IEEE

AB - Source-interface DC/DC converters are critical in DC cascaded systems for interfacing energy sources and loads but may suffer instability due to output/load impedance mismatches caused by the negative incremental impedance of constant power load (CPL). The article introduces a novel method that utilizes the nonlinear properties of nonlinear inductors within the power stage of a converter to dynamically adjust its output impedance, thereby enhancing the stability range. The concept presented revolves around the establishing of a resistive power versus constant power plane, which serves as a graphical framework to explore and define the stable power range of a circuit in relation to circuit parameters. Significantly, analysis of the power plane reveals a pivotal finding: the stability range of the system is maximized when the resistance of the inductor matches the characteristic impedance of the LC circuit formed by the converter's inductor and output capacitor. A virtual inductor resistance control is thus proposed to ensure compliance with this impedance requirement. Experimental validation was undertaken on a scaled-down converter system. © 2025 IEEE

UR - https://www.webofscience.com/wos/woscc/full-record/WOS:001665554100746

U2 - 10.1109/ECCE58356.2025.11260255

DO - 10.1109/ECCE58356.2025.11260255

M3 - RGC 32 - Refereed conference paper (with host publication)

BT - 2025 IEEE Energy Conversion Conference Congress and Exposition (ECCE)

PB - IEEE

T2 - 17th IEEE Energy Conversion Congress and Expo (ECCE 2025)

Y2 - 19 October 2025 through 23 October 2025

ER -

Enhancing Stability of DC Cascaded System by Using Nonlinear Inductor and Virtual Inductor Resistance Control in Source-Interface Converter

Abstract

Conference

Funding

RGC Funding Information

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GRF: Use of Nonlinear Inductors in Source-Interface Converters to Compensate for Instability in DC Distribution Networks

Cite this

Enhancing Stability of DC Cascaded System by Using Nonlinear Inductor and Virtual Inductor Resistance Control in Source-Interface Converter

Abstract

Conference

Funding

RGC Funding Information

Access Output

Other Access Options

Permanent Link

Other Files and Links

Fingerprint

Projects

GRF: Use of Nonlinear Inductors in Source-Interface Converters to Compensate for Instability in DC Distribution Networks

Cite this