Modeling and Analysis of Power-frequency Oscillation in Multi-virtual Synchronous Generator Parallel Systems

LI Junming; SHI Rongliang; LI Junhui; BAI Xinyuan; LAI Zhenhui

doi:10.20204/j.sp.2026.05012

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Modeling and Analysis of Power-frequency Oscillation in Multi-virtual Synchronous Generator Parallel Systems

更新时间：2026-05-20

- Modeling and Analysis of Power-frequency Oscillation in Multi-virtual Synchronous Generator Parallel Systems
- Vol. 54, Issue 5, Pages: 98-105(2026)
- 作者机构：
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- DOI：10.20204/j.sp.2026.05012
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- Published：2026
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黎俊铭,石荣亮,李军徽,白馨元,赖振晖.多虚拟同步机并联系统的功频振荡建模与分析[J].智慧电力,2026,54(5):98-105.

doi:10.20204/j.sp.2026.05012
黎俊铭,石荣亮,李军徽,白馨元,赖振晖.多虚拟同步机并联系统的功频振荡建模与分析[J].智慧电力,2026,54(5):98-105. DOI： 10.20204/j.sp.2026.05012.

doi:10.20204/j.sp.2026.05012 DOI：

摘要

多虚拟同步机（VSG）并联系统存在功率与频率振荡风险，威胁着系统运行的安全性和稳定性。现有小信号建模方法结构复杂，难以全面揭示系统在不同扰动下的功频响应特性。为此，首先基于机电比拟原理，在不同扰动条件下构建了多VSG并联系统的机械导纳模型，推导了系统功频响应的传递函数。其次，将基于该传递函数的频域响应结果与MATLAB/Simulink时域仿真结果进行对比分析，揭示并验证了多VSG并联系统在不同参数下的功频振荡特性及其变化规律。最后，通过2台100 kVA-VSG并联系统的实验，进一步验证了所建机械导纳模型和相关理论分析的正确性。

Abstract

Multi-virtual synchronous generator (VSG) parallel systems face the risk of power and frequency oscillations

which threaten the safety and stability of system operation. Existing small-signal modeling methods are structurally complex and cannot fully reveal the power-frequency response characteristics of the system under different disturbances. To address this issue

first

based on the electromechanical analogy principle

a mechanical admittance model of a multi-VSG parallel system is constructed under different disturbance conditions

and the transfer function of the system's power-frequency response is derived. Second

the frequency-domain response results based on this transfer function are compared and analyzed with time-domain simulation results from MATLAB/Simulink

revealing and validating the power-frequency oscillation characteristics and their variation laws of the multi-VSG parallel system under different parameters. Finally

experiments on a two-unit 100 kVA VSG parallel system further verify the correctness of the established mechanical admittance model and the associated theoretical analysis.

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references

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