Stability Constraints Analysis of MMC Based on Capacitor Voltage Harmonic Compensation

MMC impedance contains a large number of unpredictable resonant points due to its internal harmonic coupling, which hampers the stability analysis and oscillation suppression. Subject to this, existing research focuses on MMC have mainly investigated stability based on observing impedance curves, re...

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Bibliographic Details
Published in:IEEE journal of emerging and selected topics in power electronics 2024-12, p.1-1
Main Authors: Xu, Zigao, Yang, Guisen, Li, Binbin
Format: Article
Language:English
Subjects:
capacitor voltage harmonic compensation
Capacitors
control parameter design
Couplings
Harmonic analysis
harmonic coupling
Impedance
Oscillators
Power harmonic filters
Power system stability
stability constraints
Stability criteria
Thermal stability
Voltage control
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Summary:MMC impedance contains a large number of unpredictable resonant points due to its internal harmonic coupling, which hampers the stability analysis and oscillation suppression. Subject to this, existing research focuses on MMC have mainly investigated stability based on observing impedance curves, resulting in a lack of generalizability of their conclusions. This paper is based on a capacitor voltage harmonic compensation (CVHC) control that can completely eliminate all MMC internal harmonics coupling, and thus supresses resonant points. The exhaustive MMC linear model under CVHC is established by the harmonic linearization method to provide a theoretical basis for analytical design of MMC control. Based on the model, the control stability and the grid-connection stability are analyzed separately, leading to the quantitative stability constraints of the MMC controller parameters. Finally, the impedance shaping effect of CVHC and the stability improvement of the proposed stability constraints are verified by simulation and experimental results.
ISSN:2168-6777
DOI:10.1109/JESTPE.2024.3517553