Stability analysis of parallel virtual synchronous generators and suppression of low-frequency oscillations

Peng Zhang; Haixin Wang; Mingchao Xia; Dan Doru Micu; Hassan Bevrani; Zhe Chen; Guiqing Ma; Fei Zheng; Junyou Yang; Jincheng Li; Shouhang Zhou

doi:10.1049/enc2.70036

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Stability analysis of parallel virtual synchronous generators and suppression of low-frequency oscillations

更新时间：2026-05-21

- Stability analysis of parallel virtual synchronous generators and suppression of low-frequency oscillations
- Energy Conversion and Economics Vol. 7, Issue 2, (2026)
- 作者机构：
  
  1. School of Electrical Engineering, Shenyang University of Technology,Shenyang,China
  2. Contribution: Methodology, Software, Visualization, Writing - original draft
  3. ,and
  4. Contribution: Methodology, Writing - review & editing
  5. Contribution: Writing - review & editing
  6. Department of Electrotechnics, EnTReC Technical University of Cluj-Napoca, Cluj-Napoca,Romania
  7. Contribution: Visualization, Writing - review & editing
  8. Department of Electrical Engineering, University of Kurdistan, Sanandaj,Iran
  9. Department of Energy Technology, Aalborg University, Aalborg,Denmark
  10. Contribution: Software, Writing - review & editing
  11. State Grid (Liaoning) Electric Vehicle Service Co., Ltd.,Shenyang,China
- 作者简介：
- 基金信息：
- DOI：10.1049/enc2.70036
  CLC：
- Published：2026
- 稿件说明：
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Peng Zhang, Haixin Wang, Mingchao Xia, et al. Stability analysis of parallel virtual synchronous generators and suppression of low-frequency oscillations[J]. Energy Conversion and Economics, 2026, 7(2).
DOI：

Peng Zhang, Haixin Wang, Mingchao Xia, et al. Stability analysis of parallel virtual synchronous generators and suppression of low-frequency oscillations[J]. Energy Conversion and Economics, 2026, 7(2). DOI： 10.1049/enc2.70036.

摘要

Abstract

With the increasing penetration of power electronic devices in power systems

virtual synchronous generator (VSG) technology has garnered widespread attention for its ability to provide inertia and damping support to the grid. However

while simulating the external characteristics of synchronous generators

this technology also introduces inherent rotor oscillation issues. Particularly in multi-machine parallel operation

insufficient system damping can easily lead to low-frequency oscillations

threatening system stability and equipment safety. To address this issue

this paper first establishes a small-signal model for multi-VSG parallel grid connection. Subsequently

a Phillips-Heffron model tailored for multi-VSG parallel structures is constructed

revealing the fundamental cause of system oscillations under disturbances. Building upon this foundation and drawing inspiration from traditional power system stabilizer design principles

a virtual power system stabilizer control strategy tailored for multi-VSG parallel grid-connected systems is proposed. Finally

the proposed control strategy is validated through MATLAB/Simulink simulations. The simulation results demonstrate that

compared to conventional control methods

the proposed VPSS control strategy effectively suppresses low-frequency oscillations in the system

significantly enhancing overall stability.

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