VSC Input-Admittance Modeling and Analysis Above the Nyquist Frequency for Passivity-Based Stability Assessment

The interconnection stability of a grid-connected voltage-source converter can be assessed via the dissipative properties of its input admittance. In this paper, the modeling of the current control loop is revisited with the aim to improve the accuracy of the input-admittance model above the Nyquist...

Full description

Saved in:
Bibliographic Details
Published inIEEE transactions on industrial electronics (1982) Vol. 64; no. 8; pp. 6362 - 6370
Main Authors Harnefors, Lennart, Finger, Raphael, Xiongfei Wang, Haofeng Bai, Blaabjerg, Frede
Format Journal Article
LanguageEnglish
Published New York IEEE 01.08.2017
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Admittance
Computer simulation
Converter control
Converters
Destabilization
dissipation
Electrical impedance
Model accuracy
Modelling
Nyquist frequencies
passivity
Power conversion
Power system stability
Pulse width modulation
resonances
Resonant frequency
Stability analysis
stabilization
voltage-source converters (VSCs)
Online AccessGet full text

Cover

More Information
Summary:The interconnection stability of a grid-connected voltage-source converter can be assessed via the dissipative properties of its input admittance. In this paper, the modeling of the current control loop is revisited with the aim to improve the accuracy of the input-admittance model above the Nyquist frequency of the converter control system. Particular care is taken in the modeling of the pulsewidth-modulation and sampling processes. It is shown that, in order to eliminate the risk for destabilization of poorly damped grid resonances, dissipativeness of the input admittance is desirable not only for frequencies below, but also above, the Nyquist frequency. Validation is made by simulations and experiments.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2017.2677353