Power-Synchronization Control of Grid-Connected Voltage-Source Converters

In this paper, a novel control method of grid-connected voltage-source converters (VSCs) is proposed. The method can be generally applied for all grid-connected VSCs but may be of most importance in high-voltage dc (HVDC) applications. Different from the previous control methods, the proposed method...

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Veröffentlicht in:IEEE transactions on power systems 2010-05, Vol.25 (2), p.809-820
Hauptverfasser: Lidong Zhang, Harnefors, Lennart, Nee, Hans-Peter
Format: Artikel
Sprache:eng
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Zusammenfassung:In this paper, a novel control method of grid-connected voltage-source converters (VSCs) is proposed. The method can be generally applied for all grid-connected VSCs but may be of most importance in high-voltage dc (HVDC) applications. Different from the previous control methods, the proposed method utilizes the internal synchronization mechanism in ac systems, in principle, similar to the operation of a synchronous machine. By using this type of power-synchronization control, the VSC avoids the instability caused by a standard phase-locked loop in a weak AC-system connection. Moreover, a VSC terminal can give the weak ac system strong voltage support, just like a normal synchronous machine does. The control method is verified by both analytical models and time simulations.
ISSN:0885-8950
1558-0679
1558-0679
DOI:10.1109/TPWRS.2009.2032231