多vsg并网系统工频振荡建模、分析与抑制

IF 5 2区工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

International Journal of Electrical Power & Energy Systems Pub Date : 2025-09-26 DOI:10.1016/j.ijepes.2025.111129

Junming Li , Rongliang Shi , Zheng Dong , Junhui Li , Xing Zhang

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引用次数: 0

摘要

虚拟同步发电机（VSG）通过模仿传统同步发电机（TSG）来增强可再生能源系统的惯性响应，但继承了TSG的工频振荡问题。共耦合点处的电网阻抗导致VSG控制回路之间的相互作用，使多VSG并网系统的动态性能变得复杂。本文研究了多vsg并网系统工频振荡的建模、分析和抑制问题。首先，基于机电类比原理建立了多vsg并网系统的机械导纳模型，并推导了各种扰动下的传递函数。随后，将传递函数的频域响应与仿真结果进行对比分析，揭示了多vsg并网系统在不同系统参数下的工频振荡特性。最后，针对多vsg并网系统的振荡特性，提出了一种基于有源功率前馈补偿（APFC）的工频振荡抑制策略，并给出了设计参数。通过MATLAB/Simulink仿真和实验测试，验证了所提振荡抑制策略的有效性。

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Power-frequency oscillation modeling, analysis and suppression of multi-VSG grid-connected system

The virtual synchronous generator (VSG) enhances the inertia response of renewable energy system by mimicking traditional synchronous generators (TSG), but inherits the power-frequency oscillation issue of TSG. The grid impedance at the point of common coupling (PCC) leads to the interaction between VSG control loops, which complicates the dynamic performance of the multi-VSG grid-connected system. This paper investigates the modeling, analysis and suppression of the power-frequency oscillation for the multi-VSG grid-connected system. Initially, a mechanical admittance model of the multi-VSG grid-connected system is developed based on the electromechanical analogy principle, and the transfer functions under various disturbances are derived. Subsequently, the frequency-domain response of the transfer function is compared and analyzed with the simulation results to reveal the power-frequency oscillation behavior of the multi-VSG grid-connected system under varying system parameters. Finally, a power-frequency oscillation suppression strategy for the multi-VSG grid-connected system, based on active power feedforward compensation (APFC), is proposed in alignment with its oscillation characteristics, and the design parameters are provided. The efficacy of the proposed oscillation suppression strategy is validated through MATLAB/Simulink simulation and experimental testing.

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来源期刊

International Journal of Electrical Power & Energy Systems 工程技术-工程：电子与电气

CiteScore

12.10

自引率

17.30%

发文量

1022

审稿时长

51 days

期刊介绍： The journal covers theoretical developments in electrical power and energy systems and their applications. The coverage embraces: generation and network planning; reliability; long and short term operation; expert systems; neural networks; object oriented systems; system control centres; database and information systems; stock and parameter estimation; system security and adequacy; network theory, modelling and computation; small and large system dynamics; dynamic model identification; on-line control including load and switching control; protection; distribution systems; energy economics; impact of non-conventional systems; and man-machine interfaces. As well as original research papers, the journal publishes short contributions, book reviews and conference reports. All papers are peer-reviewed by at least two referees.