基于改进参数自适应VSG的逆变器并联控制研究

薛家祥; 胡炫; 张祥颖

薛家祥,胡炫,张祥颖.基于改进参数自适应VSG的逆变器并联控制研究[J].电测与仪表,2025,62(10):198-207.
XUE Jiaxiang,HU Xuan,ZHANG Xiangying.Research of inverter parallel control based on improved parameter adaptive VSG[J].Electrical Measurement & Instrumentation,2025,62(10):198-207.

基于改进参数自适应VSG的逆变器并联控制研究

Research of inverter parallel control based on improved parameter adaptive VSG

DOI：10.19753/j.issn1001-1390.2025.10.023

中文关键词: 虚拟同步发电机虚拟惯量阻尼系数功角特性改进型自适应策略

英文关键词:VSG, virtual inertia, damping coefficient, power angle characteristics, improved adaptive strategy

基金项目:国家自然科学基金资助项目（51875213）；广东省自然科学基金项目（2214050007061）；贵州省科技计划项目（No. ZK(2023)151）

作者中文名	作者英文名	单位
薛家祥	XUE Jiaxiang	华南理工大学机械与汽车工程学院
胡炫	HU Xuan	华南理工大学机械与汽车工程学院
张祥颖	ZHANG Xiangying	华南理工大学机械与汽车工程学院

摘要点击次数: 30

中文摘要:

虚拟同步发电机(virtual synchronous generators,VSG)技术因其能模拟同步发电机的特点，使分布式电源也具有惯性和阻尼系数，而在逆变器系统的并网和多机并联控制策略中广泛应用。为避免当外部扰动较大时，暂态过程中的冲击和振荡使VSG系统失稳，文中提出一种改进型自适应转动惯量和阻尼系数的控制策略。通过分析VSG系统的传递函数，得到不同条件下系统的动态响应曲线，初步确立虚拟惯量和阻尼系数取值。在传统自适应策略的基础上，考虑系统阻尼比，确定了阻尼系数和惯性的函数；并结合功角特性分析结果，将角速度变化值和变化率的正负纳入对转动惯量和阻尼系数取值的考虑，进一步细分自适应取值条件，提出了一种改进的自适应策略。在MATLAB/Simulink上搭建逆变系统的VSG模型，并搭建了双机并联实验平台，验证该改进策略相比固定参数及传统自适应策略能显著提高有功功率和频率稳定性，减小并机系统动态过程中的环流。

英文摘要:

Virtual synchronous generators (VSG) technology is widely used in grid-connected and multi-machine parallel control strategies for inverter systems because of its ability to simulate synchronous generators and make distributed power sources also have inertia and damping coefficients. To avoid the shocks and oscillations in the transient process that destabilize the VSG system when the external disturbances are large, an improved control strategy with adaptive rotational inertia and damping coefficients is proposed in this paper. By analyzing the transfer function of the VSG system, the dynamic response curves of the system under different conditions are obtained, and the values of virtual inertia and damping coefficient are initially established. On the basis of the traditional adaptive strategy, the damping ratio of the system is considered and the functions of the damping coefficient and inertia are determined; and combined with the results of the analysis of the power angle characteristics, the positive and negative values of the angular velocity variation and the rate of variation are incorporated into the consideration of the values of the rotational inertia and the damping coefficient, and the adaptive value conditions are further subdivided, and an improved adaptive strategy is proposed. The VSG model of the inverter system is built on MATLAB/Simulink, and a two-machine parallel experimental platform is built to verify that the improved strategy can significantly improve the active power and frequency stability and reduce the loop current in the dynamic process of the parallel system compared with the fixed parameters and the traditional adaptive strategy.

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