Low-frequency oscillation mechanism analysis of flexible DC distribution system based on MMC

被引：0

作者：

Zhang H. ^{[1
]}

Peng K. ^{[1
]}

Liu Y. ^{[1
]}

Jiang S. ^{[1
]}

机构：

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

来源：

Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2021年 / 41卷 / 05期

基金：

中国国家自然科学基金;

关键词：

DC voltage time scale; Flexible DC distribution system; Low-frequency oscillation; Modular multilevel converter; Reduced-order model; Second-order differential equation;

D O I：

10.16081/j.epae.202103016

中图分类号：

学科分类号：

摘要：

Taking the master-slave controlled flexible DC distribution system as the research object, the high-order mathematical model of flexible DC distribution system under DC voltage time scale is proposed in time domain. Furthermore, the order of mathematical model is reduced by introducing impedance coefficient. By analyzing the reduced-order mathematical model, the influences of control parameters and circuit parameters, such as the capacitance of sub-module and the sub-module number, on the system oscillation frequency are studied, and the low-frequency oscillation mechanism of flexible DC distribution system is revealed. Finally, a simulation model of flexible DC distribution system based on MMC(Modular Multilevel Converter) is built by MATLAB/Simulink, and the simulative results verify the correctness of theoretical analysis. © 2021, Electric Power Automation Equipment Press. All right reserved.

引用

页码：22 / 28

页数：6

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