Frequency coupling characteristics of electromagnetic oscillation in grid-connected converters

被引：11
|
作者：
Wang, Yuzhi [1 ]
Wang, Liang [2 ]
Jiang, Qirong [1 ]
机构：
[1] Tsinghua Univ, Dept Elect Engn, Beijing, Peoples R China
[2] Beijing Inst Technol, Sch Automat, 5 South Zhongguancun St, Beijing, Peoples R China
来源：
IET GENERATION TRANSMISSION & DISTRIBUTION | 2019年 / 13卷 / 19期
基金：
中国国家自然科学基金;
关键词：
power grids; power convertors; electric current control; phase locked loops; frequency coupling characteristics; electromagnetic oscillation; grid-connected converters; grid-connected voltage source converter; coupling components; frequency coupling phenomenon; magnitude relationship; first-order components; three-phase domain; higher-order components; VSC controller; coupling paths; phase-locked loop; overmodulation; coupling mechanism; frequency distribution characteristics; VOLTAGE-SOURCE CONVERTERS; STABILITY ANALYSIS; SEQUENCE; DQ; SYSTEMS; SSR;
D O I：
10.1049/iet-gtd.2019.0633
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Under certain conditions, grid-connected voltage source converter (VSC) may result in electromagnetic oscillations. Many coupling components with different frequencies could be observed in converter outputs when oscillation happens. The characteristics and mechanism of frequency coupling phenomenon in oscillations of VSC are studied. The magnitude relationship between first-order components in the three-phase domain is drawn by impedance model. The two first-order components will result in higher-order components due to the non-linearity of VSC controller. There are mainly three coupling paths in a controller: phase-locked loop, DC voltage fluctuation and overmodulation. The coupling mechanism and frequency distribution characteristics are investigated in this study. Theoretical results are validated by simulations with PSCAD/EMTDC.
引用
收藏
页码：4339 / 4346
页数：8
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