NDLI: Frequency coupling characteristics of electromagnetic oscillation in grid-connected converters

Content Provider	IET Digital Library
Author	Wang, Yuzhi Wang, Liang Jiang, Qirong
Abstract	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.
Starting Page	4339
Ending Page	4346
Page Count	8
ISSN	17518687
Volume Number	13
e-ISSN	17518695
Issue Number	Issue 19, Oct (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/13/19
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2019.0633
Journal	IET Generation, Transmission & Distribution
Publisher Date	2019-08-22
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Control of Electric Power System Coupling Component Coupling Mechanism Coupling Paths Current Control Demodulator Discriminators And Mixers Electric Current Control Electromagnetic Oscillation First-order Component Frequency Coupling Characteristic Frequency Coupling Phenomenon Frequency Distribution Characteristic Grid-connected Converter Grid-connected Voltage Source Converter Higher-order Component Magnitude Relationship Mathematical Analysis Modulator Overmodulation Phase Locked Loop Power Converter Power Grid Power Supplies to Apparatus Three-phase Domain VSC Controller
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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