Mechanism Analysis of Power Low-frequency Oscillations in Parallel System of Multiple Virtual Synchronous Generators

被引：0

作者：

Liu, Yuxin ^{[1
]}

Peng, Ke ^{[1
]}

Zhao, Zida ^{[1
]}

Jiang, Yan ^{[1
]}

Cai, Yuanxin ^{[1
]}

机构：

[1] School of Electrical and Electronic Engineering, Shandong University of Technology, Zibo

来源：

Dianli Xitong Zidonghua/Automation of Electric Power Systems | 2024年 / 48卷 / 19期

基金：

中国国家自然科学基金;

关键词：

applicable boundary analysis; parallel system; power oscillation; renewable energy integration; sensitivity analysis; single-generator equivalent model; virtual synchronous generator (VSG);

D O I：

10.7500/AEPS20231229004

中图分类号：

学科分类号：

摘要：

The virtual synchronous generator improves the inertia level and inertia support capacity of the renewable energy generation system by simulating the external characteristics of the conventional synchronous generator. However, the virtual synchronous generator also has the problem of power low-frequency oscillation of the conventional synchronous generator. This paper studies the mechanism of low-frequency oscillation in the parallel system of multiple virtual synchronous generators. First, the single-generator equivalent model of the parallel system of multiple virtual synchronous generators is established, and the mathematical expression of the equivalent model is deduced. Then, the analytical expression of the low-frequency oscillation frequency portrayed by active and reactive components is established. Furthermore, more the parameter influencing the oscillation frequency of reactive power is analyzed in terms of sensitivity to achieve the order reduction of the model. The influence laws of system parameters and control parameters on the oscillation frequency are revealed. Finally, the effectiveness of the model and the correctness of the theoretical analysis are verified by the simulation and experiments. © 2024 Automation of Electric Power Systems Press. All rights reserved.

引用

页码：89 / 100

页数：11

共 23 条

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