Decoupling Design Method for DC Virtual Inertia and Voltage Loop Stability Margin

Jintao Lei; Rujing Zhang; Xin Xiang; Chushan Li; Chengmin Li; Wuhua Li; Xiangning He

doi:10.17775/CSEEJPES.2021.08240

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Decoupling Design Method for DC Virtual Inertia and Voltage Loop Stability Margin

Regular Papers | 更新时间：2026-10-16

- Decoupling Design Method for DC Virtual Inertia and Voltage Loop Stability Margin
- CSEE Journal of Power and Energy Systems Vol. 11, Issue 5, Pages: 2303-2313(2025)
- 作者机构：
  
  1. College of Electrical Engineering, Zhejiang University,Hangzhou,China
  2. Zhejiang University-University of Illinois at Urbana Champaign Institute, Zhejiang University, Haining,China
- 作者简介：
- 基金信息：
- DOI：10.17775/CSEEJPES.2021.08240
  CLC：
- Published：01 September 2025
- 稿件说明：
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Jintao Lei, Rujing Zhang, Xin Xiang, et al. Decoupling Design Method for DC Virtual Inertia and Voltage Loop Stability Margin[J]. CSEE Journal of Power and Energy Systems, 2025, 11(5): 2303-2313.
DOI：

Jintao Lei, Rujing Zhang, Xin Xiang, et al. Decoupling Design Method for DC Virtual Inertia and Voltage Loop Stability Margin[J]. CSEE Journal of Power and Energy Systems, 2025, 11(5): 2303-2313. DOI： 10.17775/CSEEJPES.2021.08240.

摘要

Abstract

Implementation of large virtual inertia with high stability margin is a significant challenge for DC microgrid systems. In this paper

a filter time constant

a new degree of freedom

is utilized to enhance voltage loop stability and its relationship with virtual inertia and stability margin is further explored. Then

the virtual resistance concept is introduced as an intuitive design parameter to decouple stability margin from virtual inertia. In this way

large virtual inertia can be realized in a simple and practical way

making it easy to be emulated quantitatively and applied in engineering practice. Moreover

performance analysis of virtual resistance is conducted

which suggests virtual resistance with proper value brings little effect on its dynamic response while greatly enhances stability margin. Finally

the proposed decoupling method is validated in both simulation and experiment.

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