Advanced System-level Model Reduction Method for Multi-converter DC Power Systems

扫码查看

原文链接

维普
万方数据

外文摘要：For dynamic stability analysis and instability mech-anism understanding of multi-converter medium voltage DC power systems with droop-based double-loop control,an ad-vanced system-level model reduction method is proposed.With this method,mathematical relationships of control parameters(e.g.,current and voltage control parameters)between the system and its equivalent reduced-order model are established.First,open-loop and closed-loop equivalent reduced-order models of current control loop considering dynamic interaction among converters are established.An instability mechanism(e.g.,unrea-sonable current control parameters)of the system can be revealed intuitively.Theoretical guidance for adjustment of current control parameters can also be given.Then,considering dynamic interac-tion of current control among converters,open-loop and closed-loop equivalent reduced-order models of voltage control loop are established.Oscillation frequency and damping factor of DC bus voltage in a wide oscillation frequency range(e.g.,10-50 Hz)can be evaluated accurately.More importantly,accuracy of advanced system-level model reduction method is not compromised,even for MVDC power systems with inconsistent control parameters and different number of converters.Finally,experiments in RT-BOX hardware-in-the-loop experimental platform are conducted to validate the advanced system-level model reduction method.

外文关键词：

Closed-loop reduced-order modelinstability mechanismopen-loop reduced-order modelstability analysissystem-level model reduction method

作者：

Lin Zhu、Xueshen Zhao、Xialin Li、Li Guo、Bo Zhao、Zhanfeng Deng、Hao Lu、Chengshan Wang

展开 >

作者单位：

Key Laboratory of Smart Grid of Ministry of Education,Tianjin University,Tianjin 300072,China

Research Institute of State Grid Zhejiang Electric Power Co.,Ltd.,Hangzhou 310014,China

State Grid Global Energy Interconnection Research Institute,Beijing 102209,China

基金：

National Key Research and Development Program of ChinaChina Postdoctoral Science FoundationNational Natural Science Foundation of China

项目编号：

2020YFB15068002021M69237851977142

出版年：

2024

DOI：

10.17775/CSEEJPES.2021.08530

中国电机工程学会电力与能源系统学报(英文版)

中国电机工程学会

中国电机工程学会电力与能源系统学报(英文版)

CSTPCDEI

ISSN：2096-0042

年,卷(期)：2024.10(4)