Research on Frequency Small-signal Stability Analysis of Multi-parallel Virtual Synchronous Generator-based System

被引：0

作者：

Zeng D. ^{[1
]}

Yao J. ^{[1
]}

Zhang T. ^{[1
]}

Sun P. ^{[1
]}

Liu K. ^{[1
]}

Pei J. ^{[1
]}

机构：

[1] State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Shapingba District, Chongqing

来源：

Yao, Jun (topyj@163.com) | 1600年 / Chinese Society for Electrical Engineering卷 / 40期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

Frequency stability; Multi-parallel system; Participation factor; Small-signal model; Virtual synchronous generator(VSG);

D O I：

10.13334/j.0258-8013.pcsee.191217

中图分类号：

学科分类号：

摘要：

Different from the single virtual synchronous generator(VSG)-based grid-connected systems, the multi-parallel VSG-based grid-connected systems have more complex interactions between devices. Consequently, the traditional analysis method cannot analyze the dynamic stability performance of the system accurately. In order to study the frequency characteristics of the VSGs and power grid, this paper firstly derived the general small-signal model of the multi-machine parallel VSG-based system. Secondly, combined with the participation factor locus of the state variables of the system eigenvalues, the influences of the line impedance, the output power and the parameters of the active control loop on the eigenvalues of the low frequency band were analyzed in detail. In this way, the influence of parameters on the frequency of VSGs and power grid were obtained. Finally, the correctness of the investigated influence law on the system frequency stability was verified by simulation under different working conditions. © 2020 Chin. Soc. for Elec. Eng.

引用

页码：2048 / 2061

页数：13

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